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Full-stack developer with 7+ years of experience building web applications, backend services, and automation tools. Skilled in JavaScript/TypeScript, Node.js, React, and Python. Experienced in integrating third-party APIs, optimizing data workflows, and contributing to production environments in cross-functional engineering teams. Strong focus on maintainability, reliability, and incremental delivery.…Full-stack developer with 7+ years of experience building web applications, backend services, and automation tools. Skilled in JavaScript/TypeScript, Node.js, React, and Python. Experienced in integrating third-party APIs, optimizing data workflows, and contributing to production environments in cross-functional engineering teams. Strong focus on maintainability, reliability, and incremental delivery.

Andrii Kovalenko

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

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Full-stack developer with 7+ years of experience building web applications, backend services, and automation tools. Skilled in JavaScript/TypeScript, Node.js, React, and Python. Experienced in integrating third-party APIs, optimizing data workflows, and contributing to production environments in cross-functional engineering teams. Strong focus on maintainability, reliability, and incremental delivery.…Full-stack developer with 7+ years of experience building web applications, backend services, and automation tools. Skilled in JavaScript/TypeScript, Node.js, React, and Python. Experienced in integrating third-party APIs, optimizing data workflows, and contributing to production environments in cross-functional engineering teams. Strong focus on maintainability, reliability, and incremental delivery.

Available to hire

Full-stack developer with 7+ years of experience building web applications, backend services, and automation tools. Skilled in
JavaScript/TypeScript, Node.js, React, and Python. Experienced in integrating third-party APIs, optimizing data workflows, and
contributing to production environments in cross-functional engineering teams. Strong focus on maintainability, reliability, and
incremental delivery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Full-Stack Developer at Onseo

June 1, 2021 - October 1, 2025

Built and maintained internal tools used by operations and support teams. Implemented backend components in Node.js and improved SQL-based workflows for reporting. Developed UI features in React and optimized component performance. Worked with engineering leads to estimate feature requirements and validate deployments for internal users. Integrated OpenAI API for messaging analysis, generating responses, and summarizing customer interactions.

Automation Engineer at Tech Nova Digital Solutions

May 1, 2018 - April 1, 2021

Developed AI-powered CRM features including automated chat responses and lead-routing workflows. Built automation pipelines using n8n and Zapier to reduce manual tasks across support teams. Maintained and documented REST API endpoints supporting internal dashboards. Collaborated with design and product to plan new features and improve existing user flows.

Full-Stack Developer at Intellects of UA

February 1, 2017 - March 1, 2018

Developed backend microservices using Java (Spring Boot) and Node.js. Built data-processing jobs and optimized SQL queries for internal dashboards. Contributed to REST API documentation and code-review processes. Assisted with Docker-based deployments and basic Kubernetes operations. Worked closely with product managers to estimate tasks and deliver sprint commitments.