November 2025 focused on end-to-end improvements to billing instructions handling across frontend and API, delivering clearer UX and more reliable backend processing to improve billing status accuracy and reduce manual interventions. These coordinated changes enhance data integrity, support for revenue reporting, and customer trust.

Monthly performance summary for 2025-10 covering DEFRA/epr-calculator-service and DEFRA/epr-calculator-api. Focused on delivering robust billing data for cancelled/reappearing producers, improving data mapping and serialization, and ensuring CSV and disposal-cost workflows are stable and observable. Also accelerated platform resilience by upgrading API data dependencies and introducing a structured error tracking facility with migrations and seed data. Result: higher data integrity, more reliable billing exports, better telemetry, and easier maintainability through improved test coverage and documentation of changes.

This month delivered reliability and data integrity improvements across the DEFRA epr-calculator-service and frontend, focusing on accurate packaging tonnage calculations and robust navigation context. Key architectural and UI fixes reduce runtime errors and ensure correct totals for scaled deployments.

July 2025: Delivered a critical bug fix in the DEFRA/epr-prn-rep-exp-frontend to restore SaveSession reliability in the AddInterim Sites Save & Continue flow. The work included targeted unit tests for SaveAndComeBackLater, SaveAndContinue, and invalid actions, ensuring correct controller behavior across multi-step flows. Result: improved reliability of interim-site workflows, reduced risk of session loss, and stronger regression protection through automated tests and clear commit history. Technologies demonstrated: frontend debugging, unit testing, test-driven development practices, Git-based change management, and collaboration via PRs.