Fullstack Engineer

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.