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Senior Full Stack Developer with 15+ years of experience building scalable, high-performance systems and taking products from concept to production. Passionate about clean architecture, reliability, and performance—always going the extra mile to deliver better than requested. Experienced across JavaScript/TypeScript and PHP/Laravel, with strong backend architecture skills (microservices, APIs, distributed systems, SQL databases, and messaging). Comfortable leading technical initiatives end-to-end and collaborating on solution design with high autonomy.…Senior Full Stack Developer with 15+ years of experience building scalable, high-performance systems and taking products from concept to production. Passionate about clean architecture, reliability, and performance—always going the extra mile to deliver better than requested. Experienced across JavaScript/TypeScript and PHP/Laravel, with strong backend architecture skills (microservices, APIs, distributed systems, SQL databases, and messaging). Comfortable leading technical initiatives end-to-end and collaborating on solution design with high autonomy.

Oleg Kunytskyi

Full Stack Developer, Web Developer, Back-End Developer, +2

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Senior Full Stack Developer with 15+ years of experience building scalable, high-performance systems and taking products from concept to production. Passionate about clean architecture, reliability, and performance—always going the extra mile to deliver better than requested. Experienced across JavaScript/TypeScript and PHP/Laravel, with strong backend architecture skills (microservices, APIs, distributed systems, SQL databases, and messaging). Comfortable leading technical initiatives end-to-end and collaborating on solution design with high autonomy.…Senior Full Stack Developer with 15+ years of experience building scalable, high-performance systems and taking products from concept to production. Passionate about clean architecture, reliability, and performance—always going the extra mile to deliver better than requested. Experienced across JavaScript/TypeScript and PHP/Laravel, with strong backend architecture skills (microservices, APIs, distributed systems, SQL databases, and messaging). Comfortable leading technical initiatives end-to-end and collaborating on solution design with high autonomy.

Available to hire

Senior Full Stack Developer with 15+ years of experience building scalable, high-performance systems and taking products from concept to production. Passionate about clean architecture, reliability, and performance—always going the extra mile to deliver better than requested.

Experienced across JavaScript/TypeScript and PHP/Laravel, with strong backend architecture skills (microservices, APIs, distributed systems, SQL databases, and messaging). Comfortable leading technical initiatives end-to-end and collaborating on solution design with high autonomy.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Russian

Fluent

Ukrainian

Fluent

Work Experience

Senior Full Stack Developer at One Royal Support LTD

January 1, 2025 - October 1, 2025

Built full-stack features using JavaScript/Node.js and React.js, including a client portal and real-time financial charting tools. Architected a multi-agent RAG system using LangGraph, Pydantic AI, Redis, and Supabase (vector + SQL search). Designed and developed scalable backend services using a microservices architecture, integrating third-party APIs and ensuring reliable distributed communication. Led feature delivery from architecture and design through implementation, testing, and production deployment, and collaborated with technical leadership on planning and technical decision-making.

Senior Full Stack Developer at ABS Advanced Backoffice Services LTD

July 1, 2021 - November 1, 2024

Developed and maintained full-stack CRM and client portal systems using PHP/Laravel, JavaScript, and PostgreSQL. Built and integrated REST APIs connecting backend services with web applications and third-party platforms. Designed and optimized database schemas and queries for performance and scalability. Integrated and customized SuiteCRM to support complex business workflows, working with asynchronous and message-driven processes for integrations. Containerized applications with Docker and contributed to CI/CD and deployment improvements. Participated in technical planning, estimation, architecture, and solution design.

Senior Software Developer at Notesco Financial Services Limited

February 1, 2019 - July 1, 2021

Developed backend and web-based solutions using PHP and JavaScript, integrating trading systems with SuiteCRM and SugarCRM. Built RESTful APIs on top of legacy SOAP services to improve interoperability across internal and external systems. Implemented API integrations for high-volume financial and CRM workflows. Optimized database queries to improve performance for data-intensive operations and supported scalable backend solutions through architecture and implementation decisions. Reviewed code and assisted junior developers with technical problem-solving and best practices.