Software Engineer: Platform and Backend (Mid-career / Senior)

Theia Insights builds foundational financial intelligence products, including industry classification, knowledge graphs and factor risk models, for institutional investors. We serve some of the largest asset managers, hedge funds, index providers and sell-side banks.

As an engineer on the Platform team you'll productise our data and build the ways customers access and work with it. You'll own the analytical services, APIs and MCP connectors that let customers query our data directly from the tools they already use, and build first-party applications powered by our data.

Build and operate async REST endpoints (FastAPI, Pydantic) that serve large datasets reliably and quickly.

Work with large tabular data in pandas, Parquet/Arrow and DuckDB, and manage the memory and performance trade-offs of moving big datasets efficiently.

Own the identity and access layer, including AWS technologies for identity, authorisation and data distribution, supporting access to data through multiple channels.

Design and build new access points for our data, such as APIs, analytical services and MCP connectors.

Run services on AWS, with infrastructure in AWS CDK shipped via CodePipeline.

Productionise code from the data and quantitative teams.