Sergei Vassiljev
Full-Stack Developer
I design and ship fast, accessible web products — from architecture to pixel.
01
Tsubomi.app
Tsubomi brings together guided reading, vocabulary SRS, listening drills, kanji, grammar, and kana practice into one focused study loop built for long-term retention. Already used by 4,000+ registered learners — completely free.
02
Multi-agent research and debate app built with Next.js.
Users enter a topic, then six AI agents run a staged pipeline and stream results live. The app renders pipeline progress, per-agent activity, and a final report.
03
GPT-3 in Medical NLP
Thesis project exploring the possibilities and challenges of using GPT-3 for natural language processing in medicine — demonstrating how it can support medical processes through enhanced text analysis and NLP capabilities.
Experience
Built and launched a full-stack Japanese-learning platform solo, from architecture to production — grew it to 4,000+ registered users.
Designed and supported enterprise software solutions — working across APIs, databases, and system integrations, and translating business needs into reliable applications.
Contributed to an internal resource management tool — designed the UI with Vue.js and built Node.js APIs for seamless data integration.
Provided IT support and troubleshooting across internal systems.
Delivered web development projects for clients as an independent developer.
Contact
Let's work
together.
Open to full-time roles and freelance. I respond within 24 h.