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Confident and goal-oriented JavaScript developer and senior full-stack engineer with 13 applications. Focused not only on writing code, but also on infrastructure around it—documentation, test coverage thinking, and maintainability. Looking for an ambitious team to build innovative products, bringing experience across GraphQL/REST APIs, cloud and microservices on AWS, Kubernetes and observability, plus AI multi-agent recommendation platform evaluation and monitoring.…Confident and goal-oriented JavaScript developer and senior full-stack engineer with 13 applications. Focused not only on writing code, but also on infrastructure around it—documentation, test coverage thinking, and maintainability. Looking for an ambitious team to build innovative products, bringing experience across GraphQL/REST APIs, cloud and microservices on AWS, Kubernetes and observability, plus AI multi-agent recommendation platform evaluation and monitoring.

Yurii Kovalchuk

Full Stack Developer, Software Engineer, Back-End Developer, +3

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Confident and goal-oriented JavaScript developer and senior full-stack engineer with 13 applications. Focused not only on writing code, but also on infrastructure around it—documentation, test coverage thinking, and maintainability. Looking for an ambitious team to build innovative products, bringing experience across GraphQL/REST APIs, cloud and microservices on AWS, Kubernetes and observability, plus AI multi-agent recommendation platform evaluation and monitoring.…Confident and goal-oriented JavaScript developer and senior full-stack engineer with 13 applications. Focused not only on writing code, but also on infrastructure around it—documentation, test coverage thinking, and maintainability. Looking for an ambitious team to build innovative products, bringing experience across GraphQL/REST APIs, cloud and microservices on AWS, Kubernetes and observability, plus AI multi-agent recommendation platform evaluation and monitoring.

Available to hire

Confident and goal-oriented JavaScript developer and senior full-stack engineer with 13 applications. Focused not only on writing code, but also on infrastructure around it—documentation, test coverage thinking, and maintainability.

Looking for an ambitious team to build innovative products, bringing experience across GraphQL/REST APIs, cloud and microservices on AWS, Kubernetes and observability, plus AI multi-agent recommendation platform evaluation and monitoring.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Work Experience

Senior Full Stack Engineer at NDA client

August 1, 2022 - Present

Designed and developed GraphQL and RESTful backend services for client-side and backend integrations. Built client interfaces using React and Vue. Led the development and implementation of an AI multi-agent recommendation platform, including evaluation and monitoring of agent behavior and performance. Worked with Next.js and PostgreSQL, Redis, Kubernetes, AWS, and AWS Lambda. Focused on monitoring/observability and reliable microservices architecture on AWS using MSA patterns.

Senior Full Stack Engineer at Client under NDA

August 1, 2022 - Present

Designed and developed GraphQL and RESTful APIs for backend services. Built client-side interfaces using React and Vue. Led implementation of an AI multi-agent recommendation platform and evaluated/monitored AI agent behavior and performance. Worked across cloud and infrastructure including AWS, Kubernetes, and microservices architecture with AWS Lambda, PostgreSQL, and Redis. Improved system observability by adding monitoring and ensuring reliable operations.

Senior Full Stack Engineer at Client under NDA (Remote)

August 1, 2022 - Present

Designed and developed GraphQL and RESTful APIs for backend services. Built client-side interfaces using React and Vue. Implemented an AI multi-agent recommendation platform and evaluated/monitored AI agent behavior and performance. Worked with PostgreSQL, Redis, Kubernetes, AWS, and AWS Lambda. Improved monitoring and observability practices. Led collaboration with product/engineering and ensured API/UI integration and maintainable implementations.

Tech Lead at Sense Ukraine

September 1, 2020 - November 1, 2016

Took part in feature planning, estimating, and delivering tasks with appropriate timestamps and quality. Created technical tickets and wrote clear definitions of expected functionality. Mentored people and managed technical debt. Implemented integration tests infrastructure for independent microservices and configured CI/CD pipelines with shared code quality and standards. Wrote and promoted technical solutions by feature request.

Tech Lead / Senior Full Stack Engineer at Sense Ukraine (Data analytics platform)

September 1, 2020 - November 1, 2016

Owned responsibility for communication with the product team and defined high-level estimates for new functionality. Created technical tickets and clear definitions of expected functionality. Mentored people and managed technical debt. Implemented isolated integration tests infrastructure for independent microservices and configured CI/CD with shared code quality standards. Wrote and promoted technical solutions by feature requests and delivered improvements in test coverage for existing and new features.

Senior Full Stack Engineer at Sense Ukraine

November 1, 2016 - June 1, 2013

Took part in feature planning, estimation, and delivered with appropriate time-stamp and quality. Improved test coverage for existing and new features. Implemented and propagated style guide designs system. Designed and built client-side plugins for infrastructure. Worked with TypeScript, AngularJS, Node.js, MongoDB, Kubernetes, and AWS in a data analytics platform context.

Mid Front-End Developer at Guilty People / ISM e Company

June 1, 2013 - November 1, 2016

Single front-end developer on a project, building well-designed websites with complex structure and multiple animations/effects. Implemented high-load single-page websites with different promotional animations for popular brands. Developed familiar games using newer HTML5 features and delivered production-ready UI.

Middle Front-End Developer at Guilty People / ISME Company

June 1, 2013 - Present

Single front-end developer for a single project. Built a portfolio of web work. Implemented well-designed websites with complex structure and many animations/effects. Developed high-load single-page websites with different promotional animations for popular brands. Developed familiar games using the newest HTML5 features. Tech included JavaScript, jQuery, Angular, CSS, and HTML.