About the role
Responsibilities:
- Build APIs and business logic in NestJS; the service layer that everything else hangs off.
- Write Temporal workflow definitions in TypeScript: durable, long-running processes that stay alive for days across restarts, retries and waits on the outside world.
- Build the React + Vite interface that gives operators visibility into what the system is doing and why.
- Work in Python on the data side Polars and DuckDB over Parquet to transform datasets far too large to hold in memory.
- Wire up Azure infrastructure: blob storage, queues, containerised deploys.
- Write the tests that matter. Output can be perfectly well-formed and still be wrong. Catching that is the interesting part of the job.
Requirements:
- Roughly 2 years of professional engineering, with real shipped work behind you. We care about what you have built, not where.
- Strong TypeScript and comfort in Python. You do not need both at expert level, but you should be genuinely unbothered by moving between them.
- Solid SQL and a working feel for how data is actually shaped in the wild: messy, inconsistent, missing columns.
- You read documentation and source code before asking. When something breaks, your instinct is to find out why rather than to try another thing.
- You write clearly. Much of this job is describing a system precisely to someone who cannot see your screen.
Nice to Have:
- Exposure to workflow engines Temporal, Airflow, Step Functions, or any durable-execution model.
- Anything you have built with LLMs where the output had to be correct rather than merely plausible.
- Columnar data tooling: Polars, DuckDB, Arrow, Parquet.
- Docker, CI, infrastructure-as-code.