Senior Platform & Backend Engineer – Python, AWS, Data APIs

Theia Insights is building foundational financial intelligence products for institutional investors. This role focuses on producing reliable, scalable REST endpoints (FastAPI) and managing access to large datasets using Pandas, Parquet/Arrow and DuckDB.

You’ll own the identity layer (OAuth2, JWT, API keys) in a multi-tenant SaaS setup on AWS and contribute to data-facing services and occasional frontend work.