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Oleksandr Andrushchenko

Oleksandr Andrushchenko

Software Engineer & Solution Architect

https://github.com/oleksandr-andrushchenko https://t.me/wild_s7 https://www.linkedin.com/in/oleksandr-andrushchenko-26ab3078 https://www.instagram.com/wild.snowgirl@HackerRank@HackerRank https://www.hackerrank.com/profile/o_andrushchenko@SysDesPro@SysDesPro https://sysdespro.com/oleksandr-andrushchenko@LeetCode@LeetCode https://leetcode.com/u/Oleksandr_Andrushchenko
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About Me

Senior Software Engineer with 15+ years of experience building and optimizing scalable applications across healthcare, fintech, e-commerce, media, and logistics. Skilled in Python, JavaScript/TypeScript, PHP, cloud architecture (AWS Certified Solutions Architect & Developer), and database design (RDBMS, NoSQL). Delivered 30+ projects, improving performance, scalability, and reliability. Experienced in architectural decision-making and driving projects from concept to deployment.

Projects (38)

Segma

Segma

Internal
Marketing message delivery platform
Senior PHP Developer
Experience with Impact Scale https://www.impactscale.org
  • Built and optimized backend services with Laravel.
  • Improved database performance and API response times.
  • Designed efficient PostgreSQL schemas for high-load systems.
  • Enhanced caching and queuing for scalability.
  • Integrated carrier APIs and internal microservices.
  • Delivered clean, testable, fault-tolerant PHP code.
  • Collaborated with DevOps, QA, and product teams on new features.
  • Mentored junior developers and reviewed code.
  • Implemented Docker and Git workflows for CI/CD.
  • Refined RESTful APIs for better interoperability.
PHP · Laravel · PostgreSQL · RabbitMQ · Redis · REST APIs · Docker · Git
Oct 2025 - Present · 2 mos
Vancouver. WA · Hybrid
Ambry Tracker

Ambry Tracker

Internal
Laboratory workflow tracker
Software Engineer
Experience with Ambry Genetics https://www.ambrygen.com
  • Built and optimized APIs (Python/FastAPI), backends (PHP/Symfony), and frontends (React.js)
  • Designed and optimized storage, query, and search layers (MySQL, MongoDB, Elasticsearch)
  • Automated manual operations and achieving up to 20× faster execution and higher reliability (TS, etc.)
  • Supported and troubleshot lift-and-shift migrations to AWS (EC2, LB, Networking, etc.)
  • Upgraded programming languages, frameworks, and dependencies (e.g., PHP, Symfony, Node.js) to modern, secure versions
  • Delivered integrations with enterprise systems (SAP, QT, RP) and internal microservices
  • Authored and maintained technical documentation (code style, architecture, data flow diagrams)
  • Contributed to architectural design for scalable, real-time systems (AWS, Docker, REST APIs)
  • Mentored junior developers and conducted technical interviews to expand the engineering team
Python (Programming Language) · FastAPI · Node.js · React.js · JavaScript · PHP · Symfony · MySQL · Elasticsearch · MongoDB · Redis · Amazon Web Services (AWS) · RabbitMQ · REST APIs · DevOps · Docker · Git
Feb 2024 - Jul 2025 · 1 yr 6 mos
Aliso Viejo, CA · Remote
Ambry Query

Ambry Query

Internal
Analytics system
Software Engineer
Experience with Ambry Genetics https://www.ambrygen.com
  • Maintained and extended legacy backend systems (Python/Django)
  • Developed new features and services using the MERN stack (MongoDB, Express.js, React.js, Node.js, GraphQL)
  • Designed and maintained communication layers (HTTP APIs, WebSocket, RabbitMQ) and real-time and asynchronous operations (Apache Kafka)
  • Integrated internal enterprise systems (AT, RP, SAP) to streamline data exchange
  • Optimized and refactored database queries (PostgreSQL, MongoDB) for faster performance
  • Diagnosed and resolved production issues, improving system stability and user experience
  • Conducted technical interviews to assess and recruit developers
Python (Programming Language) · Django · Express.js · React.js · Node.js · TypeScript · MongoDB · PostgreSQL · Redis · Amazon Web Services (AWS) · RabbitMQ · GraphQL · WebSocket · Apache Kafka · Docker · Git
Jul 2024 - Jul 2025 · 1 yr 1 mo
Aliso Viejo, CA · Remote
See more at https://oleksandr-andrushchenko.com/#projects

Blueprint Visionaries

https://blueprintvisionaries.netStartup
Blueprint-to-energy model conversion
Lead Software Engineer
  • Designed and built full-stack solutions from scratch — APIs (FastAPI), backends (Python), and frontends (React.js, Bootstrap)
  • Designed and optimized database models and queries (PostgreSQL) for performance and scalability
  • Architected a scalable order-processing pipeline (AWS EventBridge, Step Functions, SQS, Lambda, etc.)
  • Managed and provisioned AWS infrastructure (CloudFormation)
  • Implemented automated CI/CD pipelines (GitHub Actions) to streamline deployments
  • Delivered integrations with external and AI-powered systems (AWS SageMaker, OpenAI, Ekotrope, SnuggPro, etc.)
  • Collaborated with stakeholders to define requirements, prioritize features, and align deliverables
  • Diagnosed and resolved production issues to maintain system reliability and user satisfaction
Python · FastAPI · React.js · JavaScript · PostgreSQL · AWS Lambda · AWS SageMaker · OpenAI API · Detectron · REST APIs · Systems Design · Solution Architecture · Amazon Web Services (AWS) · Artificial Intelligence (AI) · Large Language Models (LLM) · Bootstrap · Docker · GitHub · Git
Aug 2023 - Dec 2024 · 1 yr 5 mos
Missoula, MT · On-site
Paysera Parcels

Paysera Parcels

https://www.paysera.com/v2/en/blog/paysera-to-launch-parcel-network
Parcel locker network
Senior Full Stack Engineer
Experience with Paysera https://www.paysera.com/v2/en-GB/index
  • Designed and developed event-driven APIs (Express.js/Node.js), frontends (React.js), and communication protocols (HTTP, AMQP, Protobuf/WebSocket)
  • Designed and optimized database storage and queries (MySQL, MongoDB, Redis)
  • Developed SDKs for internal and external use (PHP/Symfony, TypeScript)
  • Implemented CI/CD pipelines and containerized deployments (Docker, GitLab CI, Helm, Kubernetes)
  • Documented APIs and projects, and mentored junior developers (RAML, Confluence)
  • Delivered integrations with internal systems (Payments, Notifications, etc.)
Express.js · Node.js · React.js · TypeScript · REST APIs · PHP · Symfony · MySQL · MongoDB · Redis · Systems Design · Grafana · RabbitMQ · WebSocket · Docker · Kubernetes · Git
Oct 2020 - Jan 2023 · 2 yrs 4 mos
Vilnius, Lithuania · Remote
IRIS CRM

IRIS CRM

https://www.nmi.com/products/merchant-relationship-management
Merchant CRM system
Senior Full Stack Developer
Experience with NMI https://www.nmi.com
  • Developed and maintained high-traffic customers onboardings
  • Optimized customers onboardings, resulting in a decrease of processing time
PHP · API Development · REST APIs · APIs · MySQL · JavaScript · Git · Docker · Laravel · GraphQL
Apr 2022 - Jan 2023 · 10 mos
Schaumburg, IL · Remote

SysDesPro

https://sysdespro.comFounder
Software system design blog
Lead Software engineer
  • Built and deployed a universal, high-performance blog platform from scratch
  • Integrated AWS services (S3, CloudFront, Lambda) for scalable, serverless deployment
  • Ensured responsive, accessible, and SEO-friendly design across devices
Python (Programming Language) · FastAPI · Amazon Web Services (AWS) · Bootstrap · JavaScript · jQuery · Postgres · AWS Lambda · DynamoDB · CloudFormation · Amazon Cognito
Jul 2025 - Nov 2025 · 5 mos
Missoula, MT · On-site

Oleksandr Andrushchenko

https://oleksandr-andrushchenko.comFounder
Personal website
Software engineer
  • Built and deployed a professional website from scratch
  • Backend: Python, FastAPI, Docker
  • Frontend: JavaScript, Bootstrap
  • AWS: S3, CloudFront, Route 53, SNS, Lambda, IAM, ACM, CloudWatch, CloudFormation
  • CI/CD: GitHub Actions, Makefile
Python (Programming Language) · FastAPI · Amazon Web Services (AWS) · Bootstrap · JavaScript · AWS Lambda
Jun 2025 - Jul 2025 · 2 mos
Missoula, MT · On-site
Rumble

Rumble

https://rumble.com
Online video platform
Senior PHP Engineer
Experience with Rumble Inc. https://rumble.com
  • Enhanced and optimized the existing codebase to improve performance, maintainability, and scalability
  • Developed and integrated new features that increased user engagement and contributed to rise in customer satisfaction
  • Identified and resolved bugs, leading to a reduction in reported issues and improvement in system stability
PHP · HTML · CSS · MySQL · JavaScript · Docker · Git
Jul 2023 - Oct 2023 · 4 mos
Longboat Key, FL · Remote
Dofasting

Dofasting

https://dofasting.com
Weight loss app
Senior Software Developer
Experience with Kilo Health https://kilo.health
  • Developed and optimized the backend REST API service using PHP and Laravel, supporting seamless communication between the app and server
  • Designed and maintained the MySQL database, ensuring efficient data storage and retrieval
  • Integrated RabbitMQ for message queuing, enhancing the app's scalability and reliability, and enabling real-time updates for users
  • Utilized Docker for containerization, streamlining the deployment process and reducing environment inconsistencies
  • Collaborated with cross-functional teams to ensure the backend services met the needs of the front-end application and users
PHP · API Development · APIs · GraphQL · Laravel · MySQL · PHPUnit · Git · TypeScript · JavaScript · Python · Django
Jul 2021 - Dec 2021 · 6 mos
Vilnius, Lithuania · Remote
Paysera - PrivatBank

Paysera - PrivatBank

https://www.paysera.com/v2/en/privatbank-cash-pickup
Paysera with PrivatBank integration
Senior Backend Engineer
Experience with Paysera https://www.paysera.com/v2/en-GB/index
  • Developed and deployed a secure, end-to-end cash transfer service (Python/Django, PostgreSQL, React.js)
  • Designed a reliable transaction processing pipeline with bank API integrations (SOAP/WSDL) to ensure accuracy and consistency
  • Enforced security and compliance through encryption, audit logging, and secure data handling
  • Monitored (Sentry, Grafana, Prometheus) and resolved production issues to maintain high system availability
Python (Programming Language) · Django · PostgreSQL · React.js · SOAP · APIs · Grafana · Prometheus · Sentry · Docker · Git
Aug 2022 - Jan 2023 · 6 mos
Vilnius, Lithuania · Remote
Paysera Delivery

Paysera Delivery

https://www.paysera.com/v2/en/checkout-delivery-service
Delivery providers aggregator service
Full Stack Developer
Experience with Paysera https://www.paysera.com/v2/en-GB/index
  • Developed and maintained RESTful APIs for multi-vendor delivery services (PHP/Symfony, React.js)
  • Integrated and tested new vendor APIs to expand service options (Venipak, DHL, DPD, etc.)
  • Designed and optimized database queries and storage for delivery tracking and order management (MySQL, Redis)
  • Participated in Agile processes, ensuring timely feature delivery and maintaining high code quality with robust test coverage (PHPUnit)
  • Implemented error handling, logging, and monitoring to improve system reliability (Sentry, Grafana)
  • Documented APIs and internal processes to improve knowledge sharing and onboarding (Confluence)
  • Mentored junior developers and conducted code reviews
  • Delivered integrations with internal systems (Payments, Notifications, Parcel Network, etc.)
PHP · Symfony · REST APIs · React.js · TypeScript · MySQL · Redis · DevOps · Docker · Kubernetes · Git
Jul 2021 - Jan 2023 · 1 yr 7 mos
Vilnius, Lithuania · Remote

Exam Me

https://github.com/oleksandr-andrushchenko/exam-me-apiFounder
Online educational platform
Senior Software Engineer (Full Stack)
  • Architected and implemented a robust backend using Node.js, GraphQL, and MongoDB, optimizing performance and scalability
  • Developed and optimized a modern React.js frontend, improving usability and interface responsiveness
Solution Architecture · PostgreSQL · React.js · AWS · MongoDB · GraphQL · Jest · Python · JavaScript · Git · Node.js · Docker · TypeScript
Dec 2023 - Jan 2025 · 1 yr 2 mos
Missoula, MT · On-site

Team4dev

https://web.archive.org/web/20211226202802/http://team4dev.net/FounderRetired
Software outsourcing development
CTO. Lead Developer
Web Development · Systems Design
Mar 2020 - Feb 2022 · 2 yrs
Kyiv, Ukraine · On-site
Dragonfish

Dragonfish

https://www.broadwaygamingb2b.com
Online gaming platform
Lead Developer
  • Fully redesigned and transferred old portal
JavaScript · HTML · DevOps · WordPress · PHP · CSS · System Design
Mar 2020 - Aug 2020 · 6 mos
Kyiv, Ukraine · Remote
Feedbacks UA

Feedbacks UA

https://t.me/Anonimni_Vidhuky_Ukraina_BotFounder
Telegram chatbot for Ukraine users
Senior Software Engineer (Back End)
  • Spearheaded the design and development
  • Delivered fully working functionality, created from scratch
  • Utilized AWS services
PHP · APIs · Symfony · AWS · PHPUnit · Web Crawling · Git · Doctrine · Docker · Systems Design · Solution Architecture
May 2022 - Jan 2023 · 9 mos
Boca Raton, FL · On-site
Feedbacks USA

Feedbacks USA

https://t.me/Anonymous_Feedbacks_USA_BotFounder
Telegram chatbot for U.S. users
Senior Software Engineer (Back End)
  • Spearheaded the design and development
  • Delivered fully working functionality, created from scratch
  • Utilized AWS services
PHP · APIs · Symfony · AWS · PHPUnit · Web Crawling · Git · Doctrine · Docker · Systems Design · Solution Architecture
Oct 2021 - Apr 2023 · 1 yr 7 mos
Boca Raton, FL · On-site
Vulkan

Vulkan

https://vulkancasino.uaRetired
Online casino
Senior Full Stack Engineer
Experience with Yellow Stone https://yellowstone.com.ua/en
  • Integrations with various gambling providers
  • Maintained and optimized existing services using Yii2 framework and Golang
  • Integrated 3rd party gambling vendors via API, increasing the platform's game offerings by ~200%
  • Processed and analyzed large datasets with Percona (MySQL), generating critical reports that informed business decisions
  • Delivered high-quality, scalable code, adhering to SOLID, DRY, and KISS principles
  • Participated in code reviews and daily Agile meetings
JavaScript · Git · Spring Boot · PHP · RabbitMQ · Go (Programming Language) · MySQL · Laravel · Yii · Memcached · Grafana
Dec 2019 - Sep 2020 · 10 mos
Kyiv, Ukraine · On-site
BeFind

BeFind

https://befind.com.ua
Jobs abroad for ukrainians
Project coordinator
WordPress · Web Development · Systems Design
Nov 2019 - Oct 2020 · 1 yr
Kyiv, Ukraine · Remote

Girlway UA

https://web.archive.org/web/20220115060708/http://girlway.com.uaFounderRetired
E-commerce platform
CTO, Lead Developer
JavaScript · DevOps · Elasticsearch · Sphinx · PHP · MySQL · Systems Design · APIs
Jun 2016 - Feb 2022 · 5 yrs 9 mos
Kyiv, Ukraine

Girlway RU

https://web.archive.org/web/20220128174509/http://girlway.com.ruFounderRetired
E-commerce platform
CTO, Lead Developer
JavaScript · DevOps · Elasticsearch · Sphinx · PHP · MySQL · Systems Design · APIs
Jan 2017 - Feb 2022 · 5 yrs 2 mos
Kyiv, Ukraine
Mr Bet

Mr Bet

https://mr.bet
Online casino
Senior Full Stack Engineer
Experience with Yellow Stone https://yellowstone.com.ua/en
  • Integrations with various gambling providers
  • Maintained and optimized existing services using Yii2 framework and Golang
  • Integrated 3rd party gambling vendors via API, increasing the platform's game offerings by ~200%
  • Processed and analyzed large datasets with Percona (MySQL), generating critical reports that informed business decisions
  • Delivered high-quality, scalable code, adhering to SOLID, DRY, and KISS principles
  • Participated in code reviews and daily Agile meetings
JavaScript · Git · Spring Boot · PHP · RabbitMQ · Go (Programming Language) · MySQL · Laravel · Yii · Memcached · Grafana
Dec 2019 - Sep 2020 · 10 mos
Kyiv, Ukraine · On-site
Pelican program

Pelican program

https://pelicanprogram.com
Gambling partnership program
Senior Full Stack Engineer
Experience with Yellow Stone https://yellowstone.com.ua/en
  • Supported and enhanced the web application using Laravel framework and Golang
  • Optimized system performance, improving logging and request processing speeds
  • Processed large volumes of data with Percona (MySQL), enabling the generation of detailed reports that improved partnership strategies
  • Mentored junior developers, accelerating their growth and improving team productivity
  • Collaborated daily with the project manager and product owner, streamlining communication and reducing project delivery time
JavaScript · Git · PHP · RabbitMQ · Python · MySQL · Yii · Memcached · Grafana · MongoDB
Dec 2019 - Sep 2020 · 10 mos
Kyiv, Ukraine · On-site
Metro Markets

Metro Markets

https://metro-markets.de
Online marketplace platform
Senior PHP Developer
Experience with Ciklum https://www.ciklum.com
  • Participated in development of backend API services using Symfony framework, supporting core marketplace functionalities and ensuring seamless integration with front-end components
  • Optimized database performance with MySQL, Memcache, and Redis
  • Implemented message queuing with RabbitMQ, enhancing system reliability and enabling efficient processing of high-volume transactions
  • Utilized Docker for containerized deployments, streamlining the development process and reducing deployment time
  • Conducted thorough unit and functional testing using PHPUnit, ensuring robust and error-free code
  • Collaborated with front-end developers to integrate backend services with frontend
PHP · Elasticsearch · API Development · APIs · Symfony · MySQL · PHPUnit · Doctrine · Git
Dec 2018 - Mar 2019 · 4 mos
Kyiv, Ukraine
Pepper

Pepper

https://nl.pepper.com
Discount sharing platform
Senior Software Engineer
Experience with Pepper https://nl.pepper.com
  • Developed and integrated new admin features, streamlining administrative workflows and improving user management efficiency
  • Collaborated with front-end and back-end teams to ensure seamless feature integration and enhance overall platform performance
PHP · API Development · APIs · Laravel · MySQL · PHPUnit · JavaScript · Git
Jun 2017 - Sep 2017 · 4 mos
Berlin, Germany · On-site
Mydealz

Mydealz

https://www.mydealz.de
Shopping community platform
Senior Software Engineer
Experience with Pepper https://nl.pepper.com
  • Developed and deployed chat bots for Facebook, enhancing user engagement and automating customer interactions
  • Implemented functional improvements and resolved critical bugs, boosting system reliability
  • Optimized search functionality using Elasticsearch, improving search accuracy and speed
  • Contributed to Agile processes, ensuring timely delivery of features and maintaining high code quality
PHP · API Development · APIs · Laravel · MySQL · PHPUnit · JavaScript · Git
Jun 2017 - Sep 2017 · 4 mos
Berlin, Germany · On-site
Sinoptik

Sinoptik

https://sinoptik.ua
#1 Weather portal in Ukraine
Senior PHP Developer
Experience with UkrNet https://www.ukr.net
  • Managed a team of 4 developers, overseeing the architecture, development, and deployment of web services, APIs, and web applications
  • Designed and implemented architecture for handling large data sets, optimizing data migration strategies, and reducing time processing
  • Led project management efforts, including risk analysis and SCRUM methodology implementation, improving project delivery speed
  • Maintained and optimized dedicated server environments
  • Developed critical application components, enhancing system security and stability
  • Conducted interviews and onboarded new developers, contributing to team growth and maintaining a high standard of technical expertise
PHP · MariaDB · Memcached · Yii · MySQL · JavaScript · jQuery · Python · Git · HTML · CSS · Sphinx · Redis · Systems Design
Jan 2017 - Jun 2017 · 6 mos
Orakul

Orakul

https://orakul.com
Horoscope web-platform
Senior PHP Developer
Experience with UkrNet https://www.ukr.net
  • Led the development of the horoscope platform
  • Architected and implemented features using PHP and Laravel, ensuring scalability and flexibility in a high-traffic environment
  • Optimized database interactions with MongoDB and MySQL, improving data retrieval speeds
  • Integrated RabbitMQ for efficient message queuing, resulting in more reliable and faster communication between services
  • Collaborated with cross-functional teams to enhance the platform’s performance
PHP · MariaDB · Memcached · Yii · MySQL · JavaScript · Git · HTML · Sphinx
Mar 2017 - Jun 2017 · 4 mos

Znaj Org

https://web.archive.org/web/20181121025938/http://znaj.orgFounderRetired
Online news aggregator
Lead Full Stack Engineer
JavaScript · DevOps · PHP · Web Crawling · MySQL · Systems Design
Jul 2017 - Jan 2019 · 1 yr 7 mos
Kyiv, Ukraine · On-site
Minicabit

Minicabit

https://www.minicabit.com
Taxi service platform
Software engineer
Experience with Softheme https://polytech.software
  • Supported, bug-fixed, and developed new features for internal admin websites, PHO admin site, and the main website, all written in PHP
  • Improved user management and implemented features like auto reallocation, cab filters, and PayPal integration, enhancing user experience and increasing booking efficiency
  • Optimized and refactored old code, resulting in a boost in system performance
  • Collaborated closely with mobile developers to enhance API functionality, contributing to a smoother user experience across platforms
  • Led the transition from PHP to Node.js as part of a team, modernizing the technology stack and reducing server response times
  • Delivered robust, maintainable code with comprehensive test coverage (PHPUnit for PHP, Jasmine for JavaScript), ensuring long-term system stability
PHP · API Development · APIs · PostgreSQL · Symfony · Express.js · Node.js · REST APIs · MySQL · PHPUnit · JavaScript · Git · Docker · React.js
Sep 2015 - Jan 2017 · 1 yr 5 mos
London, United Kingdom · Remote

Utumi

Co-founderStartupRetired
C2C online rent platform
CTO. Lead Developer
  • Spearheaded the design and development
  • Delivered fully working functionality, created from scratch
WordPress · PHP · Systems Design · DevOps · JavaScript
Jun 2019 - Sep 2019 · 4 mos
Kyiv, Ukraine · On-site
Adobe E-Sign

Adobe E-Sign

https://www.adobe.com/acrobat/business/integrations.html
Adobe E-Sign with cloud providers integrations
Lead Developer
Experience with Softheme https://polytech.software
  • Various providers: Google Drive, Box etc.
  • Maintained and enhanced the primary RESTful API service using Symfony (PHP), ensuring seamless integration with Adobe E-Sign
  • Developed new vendor API integrations (e.g., Google Drive, Box), expanding document storage options and improving user flexibility
  • Contributed to Agile processes, including code reviews, daily stand-ups, and retrospectives, leading to a reduction in development cycle time
  • Delivered high-quality, scalable code adhering to SOLID, DRY, and KISS principles
  • Achieved system architecture goals, providing a highly available, scalable service for document signing and storage, reducing downtime
PHP · API Development · PostgreSQL · Symfony · REST APIs · PHPUnit · JavaScript · Git · Docker · APIs · Doctrine
May 2015 - Apr 2016 · 1 yr
San-Francisco, CA · Remote
Dukascopy workflows

Dukascopy workflows

Internal
Workflows system
Software Engineer (Full stack)
Experience with Dukascopy Bank SA https://www.dukascopy.com/swiss/english/home
  • Developed and deployed a secure, end-to-end cash transfer service (Python/Django, PostgreSQL, React.js)
  • Designed a reliable transaction processing pipeline with bank API integrations (SOAP/WSDL) to ensure accuracy and consistency
  • Enforced security and compliance through encryption, audit logging, and secure data handling
  • Monitored (Sentry, Grafana, Prometheus) and resolved production issues to maintain high system availability
PHP · jQuery · API Development · APIs · REST APIs · MySQL · JavaScript · Git · HTML · CSS · Oracle Database
Apr 2014 - Sep 2014 · 6 mos
Kyiv, Ukraine · On-site
FXComm

FXComm

https://www.dukascopy.com/fxcomm
Social network for traders
Software Engineer (Full stack)
Experience with Dukascopy Bank SA https://www.dukascopy.com/swiss/english/home
  • Developed key features for the social network, including user profile pages, activity feeds, and financial functionalities such as internal currency implementation and money transfers
  • Created and integrated new features, such as a JavaScript gallery widget and dynamic contest creation functionality, enhancing user engagement
  • Collaborated with Oracle developers on system architecture, optimizing data handling and social engine integrations
  • Led architecture design for new features, improving system scalability and performance
  • Improved system reliability through bug-fixing, resulting in reduction in reported issues
  • Generated financial reports for contests and ensured project page availability, contributing to a more reliable and user-friendly platform
PHP · jQuery · API Development · APIs · REST APIs · MySQL · JavaScript · Git · HTML · CSS · Oracle Database · Java · Systems Design
Mar 2013 - Sep 2014 · 1 yr 7 mos
Kyiv, Ukraine · On-site
Teaser Ads

Teaser Ads

Internal
Teaser ads campaigns management platform
PHP Developer
Experience with WebCase
  • Developed and supported ads management platform to increase user engagement, resulting in a boost in click-through rates on featured content
  • Created and optimized various reports, providing actionable insights that enhanced content management and advertising strategies
  • Built aggregators, trackers, and parsers, automating data collection and processing, which improved performance and operational efficiency
  • Collaborated on backend development using PHP 5 and MySQL, ensuring seamless data flow and robust system performance
  • Automated tasks with Cron jobs, reducing manual intervention and increasing system reliability
PHP · APIs · MySQL · JavaScript · Web Application Development
May 2012 - Jan 2013 · 9 mos
Kyiv, Ukraine · On-site
FS.UA

FS.UA

https://web.archive.org/web/20130620042801/http://fs.uaRetired
#2 TV & Movie platform in Ukraine
PHP Developer
Experience with WebCase
  • Developed and supported ads management platform to increase user engagement, resulting in a boost in click-through rates on featured content
  • Created and optimized various reports, providing actionable insights that enhanced content management and advertising strategies
  • Built aggregators, trackers, and parsers, automating data collection and processing, which improved performance and operational efficiency
  • Collaborated on backend development using PHP 5 and MySQL, ensuring seamless data flow and robust system performance
  • Automated tasks with Cron jobs, reducing manual intervention and increasing system reliability
PHP · HTML · CSS · JavaScript · APIs · MySQL · Web Application Development · Git
May 2012 - Jan 2013 · 9 mos
Kyiv, Ukraine · On-site
Miniarsenal UA

Miniarsenal UA

https://web.archive.org/web/20161230033550/http://miniarsenal.com/ru/Retired
E-commerce Bitrix platform
Lead Full Stack Developer
Experience with Aniart https://www.aniart-online.com
  • Developed multiple e-commerce websites from scratch using the Bitrix platform, delivering fully functional and user-friendly online e-commerce platforms
  • Implemented custom features and integrations with PHP and JavaScript, enhancing site functionality and user experience
  • Optimized database performance with MySQL, reducing page load times and improving overall site responsiveness for existing e-commerce platforms
  • Integrated jQuery for dynamic and interactive user interfaces
  • Managed version control with Git, ensuring smooth development processes and effective team collaboration
Web Application Development · JavaScript · Bitrix · HTML · PHP · MySQL · Memcached · jQuery · CSS · Git
Nov 2011 - May 2012 · 7 mos
Kyiv, Ukraine
ICE-cat import

ICE-cat import

https://bintime.com/cases/supporting-ecommerce-through-one-global-product-catalog
ICE-cat integrations
Junior PHP Developer
Experience with BINTIME IT Company https://bintime.com
  • Developed and customized Magento products importer module to enhance e-commerce functionality
  • Optimized database queries with MySQL, improving data retrieval efficiency and reducing load times
  • Collaborated with cross-functional teams to deliver high-quality modules on time, ensuring seamless integration with existing systems
PHP · MySQL · Magento
May 2011 - Oct 2011 · 6 mos
Kyiv, Ukraine · On-site

Hard Skills

Languages & RuntimesNode.jsPythonGolangJavaTypeScriptJavaScriptPHP
Frameworks & LibrariesCodeigniterFastAPIYiiSymfonyExpress.jsReact.jsZendDjangoLaravel
API & ProtocolsAMQPgRPCGraphQLHTTPWebsocketsSOAPRPCREST APITCP/UDT
DB & StorageAWS RDSAWS S3MongoDBRedisAWS DynamoDBElasticsearchMySQLPostgreSQL
AWSECSCloudFormationDynamoDBSNSEC2LambdaSESCloudFrontRoute 53S3EventBridgeRDSSQSSageMaker
DevOps & EnvKubernetesApacheGithub ActionsDockerLinuxRabbitMQNginxTerraformGitAWS
Artificial IntelligenceChatGPTAWS SageMakerDetectronOpenAI

Work Experience (5)

Impact Scale

Senior PHP Developer

Impact Scale https://www.impactscale.org - Contract
Project: Segma Internal
Senior PHP Developer
  • Built and optimized backend services with Laravel.
  • Improved database performance and API response times.
  • Designed efficient PostgreSQL schemas for high-load systems.
  • Enhanced caching and queuing for scalability.
  • Integrated carrier APIs and internal microservices.
  • Delivered clean, testable, fault-tolerant PHP code.
  • Collaborated with DevOps, QA, and product teams on new features.
  • Mentored junior developers and reviewed code.
  • Implemented Docker and Git workflows for CI/CD.
  • Refined RESTful APIs for better interoperability.
PHP · Laravel · PostgreSQL · RabbitMQ · Redis · REST APIs · Docker · Git
Oct 2025 - Present · 2 mos
Vancouver, WA · Hybrid
Ambry Genetics

Software Engineer

Ambry Genetics https://www.ambrygen.com - Full-time
Project #1: Ambry Tracker Internal
Software Engineer
  • Built and optimized APIs (Python/FastAPI), backends (PHP/Symfony), and frontends (React.js)
  • Designed and optimized storage, query, and search layers (MySQL, MongoDB, Elasticsearch)
  • Automated manual operations and achieving up to 20× faster execution and higher reliability (TS, etc.)
  • Supported and troubleshot lift-and-shift migrations to AWS (EC2, LB, Networking, etc.)
  • Upgraded programming languages, frameworks, and dependencies (e.g., PHP, Symfony, Node.js) to modern, secure versions
  • Delivered integrations with enterprise systems (SAP, QT, RP) and internal microservices
  • Authored and maintained technical documentation (code style, architecture, data flow diagrams)
  • Contributed to architectural design for scalable, real-time systems (AWS, Docker, REST APIs)
  • Mentored junior developers and conducted technical interviews to expand the engineering team
Python (Programming Language) · FastAPI · Node.js · React.js · JavaScript · PHP · Symfony · MySQL · Elasticsearch · MongoDB · Redis · Amazon Web Services (AWS) · RabbitMQ · REST APIs · DevOps · Docker · Git
Project #2: Ambry Query Internal
Software Engineer
  • Maintained and extended legacy backend systems (Python/Django)
  • Developed new features and services using the MERN stack (MongoDB, Express.js, React.js, Node.js, GraphQL)
  • Designed and maintained communication layers (HTTP APIs, WebSocket, RabbitMQ) and real-time and asynchronous operations (Apache Kafka)
  • Integrated internal enterprise systems (AT, RP, SAP) to streamline data exchange
  • Optimized and refactored database queries (PostgreSQL, MongoDB) for faster performance
  • Diagnosed and resolved production issues, improving system stability and user experience
  • Conducted technical interviews to assess and recruit developers
Python (Programming Language) · Django · Express.js · React.js · Node.js · TypeScript · MongoDB · PostgreSQL · Redis · Amazon Web Services (AWS) · RabbitMQ · GraphQL · WebSocket · Apache Kafka · Docker · Git
Feb 2024 - Jul 2025 · 1 yr 6 mos
Aliso Viejo, CA · Remote
Paysera

Senior Software Engineer (Full stack)

Paysera https://www.paysera.com/v2/en-GB/index - Contract
Senior Full Stack Engineer
  • Designed and developed event-driven APIs (Express.js/Node.js), frontends (React.js), and communication protocols (HTTP, AMQP, Protobuf/WebSocket)
  • Designed and optimized database storage and queries (MySQL, MongoDB, Redis)
  • Developed SDKs for internal and external use (PHP/Symfony, TypeScript)
  • Implemented CI/CD pipelines and containerized deployments (Docker, GitLab CI, Helm, Kubernetes)
  • Documented APIs and projects, and mentored junior developers (RAML, Confluence)
  • Delivered integrations with internal systems (Payments, Notifications, etc.)
Express.js · Node.js · React.js · TypeScript · REST APIs · PHP · Symfony · MySQL · MongoDB · Redis · Systems Design · Grafana · RabbitMQ · WebSocket · Docker · Kubernetes · Git
Senior Backend Engineer
  • Developed and deployed a secure, end-to-end cash transfer service (Python/Django, PostgreSQL, React.js)
  • Designed a reliable transaction processing pipeline with bank API integrations (SOAP/WSDL) to ensure accuracy and consistency
  • Enforced security and compliance through encryption, audit logging, and secure data handling
  • Monitored (Sentry, Grafana, Prometheus) and resolved production issues to maintain high system availability
Python (Programming Language) · Django · PostgreSQL · React.js · SOAP · APIs · Grafana · Prometheus · Sentry · Docker · Git
Full Stack Developer
  • Developed and maintained RESTful APIs for multi-vendor delivery services (PHP/Symfony, React.js)
  • Integrated and tested new vendor APIs to expand service options (Venipak, DHL, DPD, etc.)
  • Designed and optimized database queries and storage for delivery tracking and order management (MySQL, Redis)
  • Participated in Agile processes, ensuring timely feature delivery and maintaining high code quality with robust test coverage (PHPUnit)
  • Implemented error handling, logging, and monitoring to improve system reliability (Sentry, Grafana)
  • Documented APIs and internal processes to improve knowledge sharing and onboarding (Confluence)
  • Mentored junior developers and conducted code reviews
  • Delivered integrations with internal systems (Payments, Notifications, Parcel Network, etc.)
PHP · Symfony · REST APIs · React.js · TypeScript · MySQL · Redis · DevOps · Docker · Kubernetes · Git
Oct 2020 - Jan 2023 · 2 yrs 4 mos
Vilnius, Lithuania · Remote
See more at https://oleksandr-andrushchenko.com/#experience
Softheme

Senior Software Engineer

Softheme https://polytech.software - Full-time
Software engineer
  • Supported, bug-fixed, and developed new features for internal admin websites, PHO admin site, and the main website, all written in PHP
  • Improved user management and implemented features like auto reallocation, cab filters, and PayPal integration, enhancing user experience and increasing booking efficiency
  • Optimized and refactored old code, resulting in a boost in system performance
  • Collaborated closely with mobile developers to enhance API functionality, contributing to a smoother user experience across platforms
  • Led the transition from PHP to Node.js as part of a team, modernizing the technology stack and reducing server response times
  • Delivered robust, maintainable code with comprehensive test coverage (PHPUnit for PHP, Jasmine for JavaScript), ensuring long-term system stability
PHP · API Development · APIs · PostgreSQL · Symfony · Express.js · Node.js · REST APIs · MySQL · PHPUnit · JavaScript · Git · Docker · React.js
Lead Developer
  • Various providers: Google Drive, Box etc.
  • Maintained and enhanced the primary RESTful API service using Symfony (PHP), ensuring seamless integration with Adobe E-Sign
  • Developed new vendor API integrations (e.g., Google Drive, Box), expanding document storage options and improving user flexibility
  • Contributed to Agile processes, including code reviews, daily stand-ups, and retrospectives, leading to a reduction in development cycle time
  • Delivered high-quality, scalable code adhering to SOLID, DRY, and KISS principles
  • Achieved system architecture goals, providing a highly available, scalable service for document signing and storage, reducing downtime
PHP · API Development · PostgreSQL · Symfony · REST APIs · PHPUnit · JavaScript · Git · Docker · APIs · Doctrine
Sep 2015 - Jan 2017 · 1 yr 5 mos
Kyiv, Ukraine · On-site
Dukascopy Bank SA

Software Engineer (Full stack)

Dukascopy Bank SA https://www.dukascopy.com/swiss/english/home - Full-time
Project #1: Dukascopy workflows Internal
Software Engineer (Full stack)
  • Developed and deployed a secure, end-to-end cash transfer service (Python/Django, PostgreSQL, React.js)
  • Designed a reliable transaction processing pipeline with bank API integrations (SOAP/WSDL) to ensure accuracy and consistency
  • Enforced security and compliance through encryption, audit logging, and secure data handling
  • Monitored (Sentry, Grafana, Prometheus) and resolved production issues to maintain high system availability
PHP · jQuery · API Development · APIs · REST APIs · MySQL · JavaScript · Git · HTML · CSS · Oracle Database
Software Engineer (Full stack)
  • Developed key features for the social network, including user profile pages, activity feeds, and financial functionalities such as internal currency implementation and money transfers
  • Created and integrated new features, such as a JavaScript gallery widget and dynamic contest creation functionality, enhancing user engagement
  • Collaborated with Oracle developers on system architecture, optimizing data handling and social engine integrations
  • Led architecture design for new features, improving system scalability and performance
  • Improved system reliability through bug-fixing, resulting in reduction in reported issues
  • Generated financial reports for contests and ensured project page availability, contributing to a more reliable and user-friendly platform
PHP · jQuery · API Development · APIs · REST APIs · MySQL · JavaScript · Git · HTML · CSS · Oracle Database · Java · Systems Design
Mar 2013 - Sep 2014 · 1 yr 7 mos
Kyiv, Ukraine · On-site
30+
Projects Completed
15+
Years of Experience
1,200,000+
Lines of Code
20+
Happy Customers

Expertise (6)

Custom Web Application Development

Design and build robust, scalable web applications using technologies like PHP, Python, Node.js, React.js, and PostgreSQL/MySQL

Cloud Architecture Design & Migration (AWS)

Plan, build, or migrate systems to AWS using services like Lambda, DynamoDB, SQS, EventBridge, and Docker on ECS/EKS

API Design & Integration Services

Design RESTful and GraphQL APIs, or integrate with third-party services (e.g., LLMs, Gateways, internal APIs), with a focus on reliability, documentation, and security

See more at https://oleksandr-andrushchenko.com/#services

Software Architecture Consulting & Technical Audits

Assess an existing system’s architecture and codebase, then provide guidance on how to improve scalability, performance, maintainability, or align with business goals

DevOps Automation & CI/CD Setup

Implement CI/CD pipelines (GitHub Actions, GitLab, etc.), Docker-based deployment, testing automation, and infrastructure as code (e.g., Terraform, CloudFormation)

Data Modeling & Backend Optimization

Design scalable relational (PostgreSQL, MySQL) and NoSQL (DynamoDB, MongoDB) schemas, implement caching (Redis, Memcache), and fine-tune query and backend performance

Licenses & Certifications (7)

AWS Certified Solutions Architect – Professional

AWS Certified Solutions Architect – Professional

Ongoing
Amazon Web Services (AWS)
AWS Certified Solutions Architect – Associate

AWS Certified Solutions Architect – Associate

https://www.credly.com/badges/7b014c67-bb03-4db8-a638-4ab7b5ebe8ec/public_url
Amazon Web Services (AWS)
May 29, 2024 - May 29, 2027 · 3 yrs
AWS Certified Developer – Associate

AWS Certified Developer – Associate

https://www.credly.com/badges/d40712a6-6137-4491-af71-b70af3ff96e4/public_url
Amazon Web Services (AWS)
Jun 24, 2025 - Jun 24, 2028 · 3 yrs

Education (5)

National Technical University of Ukraine 'Kyiv Polytechnic Institute'

National Technical University of Ukraine 'Kyiv Polytechnic Institute'

https://kpi.ua
Bachelor's degree - Computer Science / Intellectual systems of decision making
Graduated from Educational-scientific complex ‘Institute of applied systematic analysis, National Technical University of Ukraine, Kyiv Polytechnic Institute and got higher basic education in direction of preparation “Computer sciences” and got qualification of Bachelor of Computer Sciences
39420917
Sep 2006 - Jun 2010 · 3 yrs 10 mos
Kyiv, Ukraine
National Technical University of Ukraine 'Kyiv Polytechnic Institute'

National Technical University of Ukraine 'Kyiv Polytechnic Institute'

https://kpi.ua
Specialist's degree (Full college degree) - Computer Science
39420917
Sep 2010 - Feb 2012 · 1 yr 6 mos
Kyiv, Ukraine
National Technical University of Ukraine 'Kyiv Polytechnic Institute'

National Technical University of Ukraine 'Kyiv Polytechnic Institute'

https://kpi.ua
Full general secondary - Mathematics
Educational-scientific complex ‘Institute of applied systematic analysis, National Technical University of Ukraine, Kyiv Polytechnic Institute
29174972
Sep 2004 - Jun 2006 · 1 yr 10 mos
Kyiv, Ukraine
See more at https://oleksandr-andrushchenko.com/#education

High school No. 323 of International Relations

https://323.kyiv.ua
Base general secondary - English Language
Sep 2002 - Jun 2004 · 1 yr 10 mos
Kyiv, Ukraine
Academic Lyceum No. 5

Academic Lyceum No. 5

http://obukhiv-school5.edukit.kiev.ua
Base general secondary
Sep 1995 - Jun 2002 · 6 yrs 10 mos
Obukhiv City, Kyiv Region, Ukraine
Done is better than perfect
Sheryl Sandberg, Lean In (2013)

Latest Publications (9)

Scalability for Dummies — Part 1: Clones

https://sysdespro.com/posts/6c1ebd4f-bd8a-4b80-bdde-1eacc9357a5b
SysDesPro
Nov 23, 2025
Scalability for Dummies — Part 1: Clones

Software System Design Topics

https://sysdespro.com/posts/dbf3c020-a2df-45b2-b9fc-70f35db6b125
SysDesPro
Nov 21, 2025
Software System Design Topics

CAP Theorem in System Design

https://sysdespro.com/posts/1dade755-1375-4da6-97b2-20e52cf5fe0b
SysDesPro
Nov 13, 2025
CAP Theorem in System Design
See more at https://oleksandr-andrushchenko.com/#publications

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https://github.com/oleksandr-andrushchenko
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Credly

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https://www.credly.com/users/oleksandr-andrushchenko-1988
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https://www.linkedin.com/in/oleksandr-andrushchenko-26ab3078

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