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I'm a Senior Full Stack Developer with 15+ years of experience building scalable web applications across the entire technology stack. I specialize in Go, JavaScript/React, Elixir, and Ruby on Rails, with a strong background in modern cloud infrastructure, microservices, and real-time data processing systems. I've led teams, architected high-performance systems, and delivered reliable APIs and dashboards. I enjoy mentoring engineers, implementing robust testing strategies, and shipping maintainable code that scales with business needs.…I'm a Senior Full Stack Developer with 15+ years of experience building scalable web applications across the entire technology stack. I specialize in Go, JavaScript/React, Elixir, and Ruby on Rails, with a strong background in modern cloud infrastructure, microservices, and real-time data processing systems. I've led teams, architected high-performance systems, and delivered reliable APIs and dashboards. I enjoy mentoring engineers, implementing robust testing strategies, and shipping maintainable code that scales with business needs.

Alexandr Korsak

Full Stack Developer, Web Developer, Game Developer, +1

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I'm a Senior Full Stack Developer with 15+ years of experience building scalable web applications across the entire technology stack. I specialize in Go, JavaScript/React, Elixir, and Ruby on Rails, with a strong background in modern cloud infrastructure, microservices, and real-time data processing systems. I've led teams, architected high-performance systems, and delivered reliable APIs and dashboards. I enjoy mentoring engineers, implementing robust testing strategies, and shipping maintainable code that scales with business needs.…I'm a Senior Full Stack Developer with 15+ years of experience building scalable web applications across the entire technology stack. I specialize in Go, JavaScript/React, Elixir, and Ruby on Rails, with a strong background in modern cloud infrastructure, microservices, and real-time data processing systems. I've led teams, architected high-performance systems, and delivered reliable APIs and dashboards. I enjoy mentoring engineers, implementing robust testing strategies, and shipping maintainable code that scales with business needs.

Available to hire

I’m a Senior Full Stack Developer with 15+ years of experience building scalable web applications across the entire technology stack. I specialize in Go, JavaScript/React, Elixir, and Ruby on Rails, with a strong background in modern cloud infrastructure, microservices, and real-time data processing systems.

I’ve led teams, architected high-performance systems, and delivered reliable APIs and dashboards. I enjoy mentoring engineers, implementing robust testing strategies, and shipping maintainable code that scales with business needs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Intermediate

Work Experience

Lead Software Engineer at Blastworks

January 1, 2015 - Present

Architected and developed real-time gaming platform processing 10M+ events daily using Elixir/Phoenix, Go, and Kafka with 99.9% uptime. Built high-performance APIs for Analytics with Go, PostgreSQL, Kafka. Led development of internal dashboards using Elixir (Phoenix) and React JS. Implemented comprehensive testing strategies. Mentored a team of 5 developers on full stack best practices, code review processes, and system design patterns.

Software Developer (Remote Consulting) at Flexe

January 1, 2017 - January 1, 2019

Developed warehouse management dashboards using Ruby on Rails and React, enabling real-time inventory tracking for 50+ facilities. Built barcode scanning service in Golang processing 100K+ shipments daily with 99.99% accuracy. Created responsive frontend components using React and modern JavaScript (ES6+) for logistics tracking interfaces. Integrated third-party APIs for shipping carriers and warehouse automation systems.

Software Developer & Team Lead at GameHouse

January 1, 2012 - January 1, 2015

Led team of 6 Ruby and JavaScript developers building mobile advertising platform serving 5M+ daily impressions. Developed full stack applications using Ruby on Rails, Node.js, MongoDB, Redis, and AngularJS. Built RESTful APIs and real-time features using WebSockets for multi-player game experiences. Implemented containerized deployment pipeline using Docker and Ansible, reducing deployment time by 80%. Wrote comprehensive test suites using RSpec and Cucumber for API endpoints and business logic. Collaborated with product and design teams to prototype and launch new features on 2-week sprint cycles.

Co-founder & Lead Developer at Musicfeed

January 1, 2011 - January 1, 2014

Built music discovery iOS application integrating Spotify, SoundCloud, YouTube, and Mixcloud APIs. Developed backend aggregation system using Ruby and Elixir processing 1M+ social media feeds daily. Created real-time recommendation engine using PostgreSQL, Redis, and ElasticSearch. Implemented microservices communication using RabbitMQ for scalable feed processing. Designed and built responsive web interface using modern JavaScript frameworks.

Software Developer at Yardstick

January 1, 2011 - January 1, 2014

Developed Learning Management System using Ruby on Rails, PostgreSQL, and AngularJS. Built interactive frontend experiences for students and teachers with real-time collaboration features. Implemented full-text search using ElasticSearch for course content and user-generated materials. Practiced TDD methodology with RSpec achieving 95%+ test coverage on critical business logic.

Co-founder & Team Lead at TheHamon

January 1, 2011 - January 1, 2012

Led team of 3 developers building Risk Management web application for financial services clients. Developed full stack application using Ruby on Rails, MySQL, Redis, and Backbone.js. Implemented BDD workflow using Cucumber for client approval and acceptance testing. Practiced pair programming and Agile methodologies (Scrum, Kanban).

Software Developer at Monterosa

January 1, 2011 - January 1, 2011

Developed real-time TV show gaming backend using Ruby on Rails and JavaScript.

Software Developer at Belitsoft

January 1, 2009 - January 1, 2011

Built custom SharePoint and .NET applications with C# and JavaScript.

Ruby/SharePoint Developer at Itransition

January 1, 2007 - January 1, 2009

Developed Facebook applications and e-commerce platforms using Ruby on Rails and JavaScript.