Senior Fullstack AI Engineer — Remote EU

Newcode; Chicago (IL); On-site; USD 120,000 - 180,000; Full time

Job summary

Newcode.ai in Chicago is seeking a senior fullstack engineer to own features end-to-end—from backend FastAPI services to a responsive React UI. The role emphasizes building robust APIs, streaming updates, and interfaces capable of handling large document workloads.

You’ll push for high-quality code, thoughtful architecture, and practical AI tooling usage, with a startup mindset that adapts quickly and ships value rapidly.

Qualifications

• At least five years building and shipping fullstack work, depth matters more than quantity.
• Able to design clean APIs and build a good UI on top of them.
• 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) effectively and don’t rely on AI to write code you don’t understand.
• Keen to dive deeper into LLMs, RAG, and agents.
• Comfortable in a startup that shifts quickly.

Responsibilities

• Building AI features end to end, API through UI.
• Making models usable: streaming responses, real-time updates, and interfaces that handle many documents without feeling slow.
• Owning quality and architecture on both sides of a feature.
• Collaborating with frontend or backend specialists when deeper work is needed, and handling the rest yourself.

Skills

React

TypeScript

FastAPI

Python

API design

Tools

Next.js

React Query

Zustand

shadcn/ui

LangChain

LlamaIndex

WebSocket

SSE

Job description

Newcode.ai in Chicago is seeking a senior fullstack engineer to own features end-to-end—from backend FastAPI services to a responsive React UI. The role emphasizes building robust APIs, streaming updates, and interfaces capable of handling large document workloads.

You’ll push for high-quality code, thoughtful architecture, and practical AI tooling usage, with a startup mindset that adapts quickly and ships value rapidly.