Nikita Petrich

„Nikita and I went through onboarding together at Manifest OS and then worked closely in the same team for a considerable time. He was a Senior Fullstack Engineer there, involved among other things in consolidating the separate portals into the unified one — a rebuild that required merging data model and UI, and correspondingly a lot of care and context. What stayed with me most about working with him: Nikita is extremely self-reliant. He found his way into a complex, grown codebase without anyone having to guide him through it, and was always approachable whenever I had questions. His code was clean, type-safe and tested — he consistently applied SOLID and clean code principles and built reusable components and utilities that the whole team benefited from. That made reviews with him productive rather than tedious. Worth mentioning as well: he didn’t just work on his own tickets. He repeatedly tracked down existing bugs in the system that nobody had noticed before and fixed them directly. A real asset to the team, both technically and personally. I’d work with him again any time and recommend him without reservation.“

„As tech lead for the B2C area I worked with Nikita at Manifest OS on the HubSpot, Cal.com and Bluedot AI integration — him as a Senior Fullstack Engineer, me on the lead side. Specifically it was about event-driven enrichment of initial legal consultation leads: meeting recordings are transcribed via Bluedot, processed further through a webhook and a queue, evaluated by an LLM, and the structured results flow back into the core systems automatically. A chain with plenty of failure modes, which had to be built accordingly resilient (retry, idempotency). Nikita delivered this integration entirely on his own responsibility. I never had to step in — he kept me updated with short, precise status updates, escalated open decisions in time and carried the rest himself. The result was a fully functional AI integration running in production, cleanly implemented and delivered on time. For me that’s the best illustration of how he works: a high degree of autonomy combined with transparent communication. I can clearly recommend Nikita.“

„As Product Manager I owned the Amplitude analytics project at Manifest OS; Nikita, as a Senior Fullstack Engineer, was the one who carried the implementation. He designed and implemented the application-wide event tracking, instrumented all relevant business user flows, tested and validated the events and created the data foundation that made weaknesses and friction points in the user journey visible in the first place. What made the collaboration so easy from a PM perspective is how autonomously Nikita worked: he grasped requirements quickly, identified gaps himself and asked targeted questions rather than making assumptions. He was also strong cross-functionally: he worked closely with our designers and consistently followed the design system instead of building his own one-offs, which noticeably supported the visual consistency of the platform.“

„We are extremely happy with Nikita Petrich's work as a freelance developer! He made a decisive contribution to our AI toy project and delivered a clear, secure and scalable solution. Nikita built a Next.js app for setting the toy up easily as well as a Next.js progressive web application (PWA) for the dashboard through which parents can follow, filter and analyse their children's play sessions. He used state-of-the-art technologies for the implementation, among them React, Next.js 15, Tailwind CSS, shadcn, Supabase and Docker, along with CI/CD pipelines and unit tests to ensure the quality, security and reliability of the applications. We particularly value Nikita's professionalism, his technical expertise and his considered approach — we would work with him again at any time and can recommend him without reservation.“

„We have been working with Nikita for three months now. His performance and commitment clearly exceed what you would expect from a freelancer. He supports us in developing software for notary offices and works through the frontend requirements (React TS) quickly and reliably. Beyond that, he improves the quality of the source code on his own initiative and contributes substantially to the quality assurance of the software. We very much enjoy working with Nikita and recommend him without reservation. He is an excellent choice when frontend solutions need to be implemented cleanly and in a user-friendly way.“

„I would like to recommend Nikita Petrich without reservation for his outstanding work as a full stack developer. He built a bespoke ERP system for our company that has substantially improved our business processes. Points worth highlighting: Technical expertise: using technologies such as React, NestJS, GraphQL and MariaDB, Nikita created a powerful and user-friendly ERP system tailored precisely to our requirements. Efficient inventory management: the solution he implemented allows precise real-time tracking of our stock, which has markedly increased our efficiency. Invoicing: the function for generating PDF invoices has sped up our workflows and minimised errors. Professional collaboration: Nikita convinced us with clear communication, proactive suggestions and thorough training during the implementation. Reliable support: even after the project was completed he is always available for questions and adjustments. Nikita combines technical expertise with a solution-oriented way of working and a high degree of professionalism. We are delighted with his work and can recommend him to any company looking for bespoke software solutions. Many thanks for the excellent collaboration!“

„I am happy to confirm that we have contracted Nikita from July 2021, to February 2023. Nikita was responsible for developing the front-end and the back-end of the platform. Nikita worked independently on our platform and helped us provide the best UI/UX experience due to his experience in the Front-end field. We got to know Nikita as a competent, friendly and engaged person. We believe that Nikita has a tremendous amount of potential and would be an outstanding addition to the team. I would have no reservations about hiring him again and I am confident in recommending Nikita for employment or external support as a contractor.“

„I am glad to give Nikita Petrich a positive reference for his work in our joint project for the XU Group. During our collaboration Nikita worked as a full-stack developer focusing on Angular in the frontend and NestJS in the backend. In that role he consistently convinced through his technical expertise, his reliability and his structured way of working. His ability to grasp complex requirements quickly and turn them into efficient, clean solutions deserves particular mention. Nikita was not only a strong team player professionally but also an asset to the project as a person. Communication with him was always open, constructive and goal-oriented. I can recommend Nikita and am convinced that he will be a valuable support in future projects as well.“