Worked on the companieshouse/limited-partnerships-api and related repositories to enhance data consistency and test reliability across backend and frontend systems. Refactored jurisdiction mapping logic to standardize keys and align data representations between the API, SDK, and web UI, reducing the risk of mismatches in jurisdiction data for downstream integrations. Improved test infrastructure by introducing Testcontainers-based MongoDB integration tests and migrating to Spring Boot’s testing framework, ensuring more reliable and production-like test environments. Optimized build automation by updating Maven packaging processes in the Makefile to skip tests, which reduced build times. Utilized Java, TypeScript, Spring Boot, and Maven throughout.