Senior Fullstack Developer
About The Position
At Newcode.ai, we’re on a mission to reshape how organizations put AI to work in their day-to-day operations. In few months, we’ve moved from vision to reality—building products our clients truly love. As part of our fast-growing and highly ambitious team, you won't just drive the future of AI—you’ll help define it. You'll build features the whole way through: the FastAPI service and data work on the back, the React interface on the front. Most of what we build puts a language model in front of someone doing real work, so a typical feature might mean wiring up retrieval and an LLM call on the backend, then building the streaming, document-heavy UI that makes it usable. We want someone who can carry a feature from idea to production without handing it over a wall. You should be at home in a Celery task and in a React component, and able to handle routine work on either side without waiting for a specialist to unblock you.
Requirements
- At least five years building and shipping fullstack work. Depth matters more to us than the number.
- Comfortable on both sides for real: you can design a clean API and build a good UI on top of it.
- You care how it turns out: readable code, a UI that feels right, an architecture you'd defend.
- You use AI coding tools (Claude Code, Cursor, Copilot) and use them well. They make you faster; they don't write code you don't understand, and you wouldn't pass sloppy AI output in review.
- Keen to go deeper on LLMs, RAG, and agents.
- Fine working in a startup that shifts under you.
- React: 5+ years
- TypeScript: 3+ years
- FastAPI / Python: 3+ years
- PostgreSQL
- Redis: 2+ years
- Tailwind CSS: 1+ year
Nice To Haves
- Next.js
- React Query
- Zustand
- shadcn/ui
- LangChain or LlamaIndex
- streaming over SSE or WebSocket
Responsibilities
- Building AI features end to end, API through UI.
- Making models usable: streaming responses, real-time updates, and interfaces that handle a lot of documents without feeling slow.
- Owning quality and architecture on both sides of a feature.
- Pulling in our frontend or backend specialists when something needs real depth, and handling the rest yourself.
Benefits
- Work flexibly, in English, from anywhere in the EU.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
