Month 2025-11: DEFRA/epr-calculator-service focused on delivering a robust Enhanced Error Reporting System, improving customer-facing error clarity and enabling faster diagnosis. Key work centered on formulating clearer, more accurate error reports, ensuring producer and trading names are correctly mapped, and reorganizing the report structure to accelerate triage and diagnostics across production issues.

October 2025 monthly summary for DEFRA EPR projects. This period focused on delivering a robust error reporting workflow and enhancing billing data quality, with concrete commits and refactors that improve reliability and user value.

September 2025 focused on delivering user-facing navigation improvements, configuration alignment, template handling, and enhanced billing auditability across the DEFRA epr-calculator platforms. The month delivered tangible business value through UX consistency, deployment reliability, and clearer billing reconciliation workflows.

Monthly summary for 2025-08: Focused on improving data accuracy and reliability in the DEFRA/epr-calculator-api Billing File Service. Delivered a critical bug fix to ensure missing producers are included in the Accept/Reject process, refactored data retrieval for parent producers, and addressed SonarQube issues. These changes reduce billing errors, improve downstream reporting, and strengthen revenue assurance for producer settlements. No new user-facing features were released this month; the work centered on quality, correctness, and maintainability.

Monthly summary for 2025-07: DEFRA/epr-calculator-service delivered four major features that improve data fidelity, performance, and maintainability, alongside stability fixes that reduce risk in billing calculations. Key outcomes include enhanced tonnage export JSON mapping (including historical invoiced tonnage for level-based mappings), a refactor of producer disposal fees with new data models and nested cost sections, migration from Newtonsoft.Json to System.Text.Json for serialization, and strengthened test robustness for CalcResultSummaryBuilder. These changes deliver clearer billing instructions, faster JSON processing, and a stronger release posture with reduced dependency surface. Business impact includes more accurate billing data, easier maintenance, and faster iteration on pricing rules.

June 2025 Monthly Summary (DEFRA/epr-calculator-service): Delivered enhancements to billing processing and data export capabilities, improved reliability of run status handling, and fixed data mapping and currency issues. These efforts collectively enhanced data quality, analytics readiness, and operational resilience for billing calculations and downstream consumers.

May 2025 Monthly Summary: Delivered end-to-end billing workflow, improved data integrity, and strengthened reliability across the epr-calculator suite. Highlights include implementing Billing File Metadata Storage and end-to-end Billing File Preparation/Submission to FSS, upgrading shared data contracts (NuGet package) across FSS API projects, and enhancing the frontend with a dedicated calculator-run error state and a reliable rerun path. Back-end fixes improved calculation results correctness and tonnage handling to ensure accurate reporting. These changes collectively reduce risk, improve regulatory compliance, and enable scalable billing operations while demonstrating proficiency in C#, EF Core, API design, and frontend testing.

April 2025 monthly summary focusing on delivering business value through reliability improvements, user-context awareness, and enhanced reporting. Key frontend and backend work reduced risk of broken navigation, enabled session-driven financial year handling, and added billing instructions and invoice amount suggestions in reports. Across two repositories, the work aligns with improving user experience and data accuracy while laying groundwork for scalable, testable features.

Monthly summary for 2025-03 focusing on key accomplishments, major features delivered, major bugs fixed, impact, and technologies demonstrated across DEFRA/epr-calculator-service and DEFRA/epr-calculator-frontend.

February 2025 monthly summary focusing on key accomplishments across DEFRA epr-calculator APIs and services. Delivered foundational data-model enhancements and reporting improvements to enable more accurate disposal-cost calculations and scalable submission-period tracking. Implemented data integration for Public Bin (PB) and Household Drinks Containers (HDC), introduced a new SubmissionPeriodLookup model, and enhanced tonnage reporting and CSV exports with standardized units. These changes improve data quality, regulatory readiness, and business reporting capabilities while maintaining strong test coverage and cross-repo alignment.

January 2025: DEFRA/epr-calculator-api delivered measurable business value through two major capabilities: (1) Total Bill Breakdown refactor and header standardization, consolidating calculation logic into a single SetValues workflow, updating headers and tests, and fixing a data-mismatch issue in result files (#152). (2) Asynchronous Calculator API endpoints, making run, status updates, and related GET endpoints async, with updated tests and messaging service integration to improve throughput and scalability. These changes reduced latency, improved data integrity, and enhanced maintainability. Demonstrated skills in C#, asynchronous programming, API design, test-driven development, and messaging integrations.

December 2024 monthly summary for the DEFRA/epr-calculator-api. Delivered key feature enhancements and reliability improvements that directly increase billing accuracy, stakeholder reporting quality, and maintainability. Implemented a dedicated producer for LA Data Prep Costs, extended calculation coverage for SA Setup Costs, and introduced an aggregated total bill calculation across sections with bad debt provisions. Also hardened the calculation workflow with robustness fixes and improved error handling, enabling more reliable runs and faster incident resolution. The changes include data model updates, expanded tests, and clearer reporting of billing outcomes, setting a foundation for future enhancements.