Full Stack Engineer - Python/React.js
First seen by Alion on Oct 23, 2026.
About The Role :
You will build features end to end : the API service on the backend, the Next.js application on the frontend, and the design decisions that connect them.
This is a hands-on role with real ownership.
You will help decide how things are built, not just implement someone else's plan.
What You Will Do :
- Build and maintain Python services (FastAPI) that are fast on reads and correct on writes.
- Design the data model and write the SQL behind it.
- Build product screens in Next.js and React that hold up with real data : dense tables, dashboards, forms with complex state.
- Decide what renders on the server and what renders on the client.
- Add logging, metrics, and tracing so problems can be diagnosed in production.
- Write a short design doc before building anything that crosses a service boundary.
- Review other people's code carefully.
What We Are Looking For :
Python backend :
- 5+ years writing production Python, including a modern async framework such as FastAPI.
- Comfortable with async/await, background tasks, and structured error handling.
- You write tests as part of building, not after.
SQL :
- Solid relational modelling and comfort writing non-trivial queries by hand.
- You can read a query plan and explain why something is slow.
- You have run schema migrations on a live system.
Frontend :
- 3+ years of production React, with a real understanding of why a component re-renders.
- Next.js App Router in production : server components, route handlers, caching.
- TypeScript used to model the domain, not just to satisfy the compiler.
- A clear view of what belongs in server state, client state, and the URL.
Architecture and system design :
- You can turn an ambiguous requirement into a design with stated assumptions and trade-offs.
- Comfortable with the fundamentals : idempotency, retries, timeouts, caching and invalidation, consistency.
- You have made a wrong call, caught it, and fixed it.
- We will ask about this.
Nice to have :
- Experience with an analytical database such as Snowflake or BigQuery.
- Event-driven or queue-based systems in production.
- Authorization design : row-level access, tenant isolation.
Skills
Full Stack, Python, React.js, SQL, Next.js, FastAPI, System Design, TypeScript