Full Stack Developer with Next.JS & NestJS Expertise

“Serhii is entrepreneurial, dependable and quality minded, and he always leaves the codebase better than he finds it. From improving database schemas and migrations, to adding documentation and context where it was missing. His ownership extends beyond his tickets and he is proactive in making things better and proposing ways to improve both the code and the processes. I liked him, so did his teammates and cross functional partners, you will too.”

Senior JS Developer to elevate the AI Product

“Serhii was an incredible talent – he jumped into the project and quickly got up to speed, helping us quickly fix some bugs and get our MVP over the line, clearing all of the QA backlog. Would love to work with him in the future. Very efficient, professional, and easy to work with.”

Senior TypeScript & NestJS Engineer - Agentic AI Platform for Media & Advertising

“Serhii did a really excellent job on our agentic AI platform. We were migrating from c# to node (NestJS) and he helped clean up quite a bit of platform/environment setup in Node & TypeScript that was done incorrectly. Although, he didn't have experience in c# he was able to figure it out very quickly to do database migrations, and port logic to TypeScript. Our project required a lot of experimentation with AI prompts, RAG, vector embeddings etc. and he did an excellent job of creating working autonomous AI agents using the OpenAI Agents SDK. His communication about what he worked on every day was impeccable. He was fast at getting things done.”

Cloud Automation Specialist

“Exceptional work! The freelancer immediately grasped the project requirements and delivered our cloud automation tasks with speed and precision. They maintained clear communication, provided regular updates, and ensured everything was thoroughly tested. Their professionalism, expertise, and attention to detail were truly impressive. I would gladly recommend them!”

April 22, 2026 · Andy managed Serhii directly

“Serhii is exactly the kind of Full-Stack Developer you want on your team when the pressure is on. At Clicktech, we worked in a highly demanding and fast-paced environment, and Serhii consistently stood out for his ability to tackle new challenges head-on. He is incredibly adaptable, quickly picking up new technologies and pivoting when project requirements change. What truly sets Serhii apart, however, is his communication. He bridges the gap between front-end, back-end, and project stakeholders seamlessly, ensuring everyone is always on the same page. He is a resilient, proactive, and highly skilled developer who I would gladly work with again.”

March 23, 2026 · Alejo worked with Serhii on the same team

“Serhii es un compañero de trabajo increíble. Durante nuestro tiempo trabajando juntos, ha demostrado un gran pensamiento analítico y realmente disfruto colaborar con él. Es definitivamente una persona que quiero siempre en mi equipo!”