Worked across OpenMS and Hoppscotch repositories to deliver targeted improvements in data processing accuracy and backend security. In OpenMS, addressed a mass spectrometry data issue by updating MassTrace.cpp to correctly handle single-peak mass traces, ensuring centroid retention time and mass-to-charge values are set directly from the available data point for accurate scientific results. For Hoppscotch, implemented environment-specific CORS configuration using TypeScript and Node.js, allowing flexible origins in development while enforcing strict whitelisting in production. Demonstrated algorithm implementation, backend development, and cross-repository collaboration, with clear commit traceability and a focus on reliability, security, and maintainable software development practices.