Senior Platform & Backend Engineer — AWS, APIs & Data

Theia Insights is seeking a mid-to-senior backend engineer in the UK to build scalable async REST endpoints using FastAPI and Python. You will manage large data pipelines with Pandas, Parquet/Arrow, and DuckDB, while owning identity and access via AWS IAM and OAuth2/OIDC.

Work closely with data teams to design new data access points, run services on AWS, and occasionally contribute to front-end features in TypeScript/React for end-to-end ownership and reliability.