Monthly summary for 2025-12 focused on the Companies House ch.gov.uk repository. Highlights include delivery of traffic management migration work, validation in staging, and preparation for production rollout. The summary emphasizes business value, technical achievements, and skills demonstrated.

November 2025: Delivered a traffic management migration to a Mesos/ECS-based architecture for companieshouse/ch.gov.uk, enabling staged validation and safer production routing. The migration involved disabling stage listeners, activating ECS listeners to route traffic, and validating performance under real load. Two commits completed the workflow: 'Switching traffic to mesos in staging' and 'Switching traffic back to ECS'. No major bugs were recorded; the work focused on architecture modernization with a clear rollback path back to ECS. Business impact includes improved service availability, resilience during deployments, and readiness for future scaling.

Month: 2025-09 – Repository: companieshouse/ch.gov.uk. Focused on infrastructure routing control to support migration/maintenance in staging. Delivered a feature that can disable the ECS listener across staging profiles to route traffic away during maintenance and re-enable it to route traffic back to staging ECS instances. This reduces maintenance downtime and risk by allowing controlled, reversible traffic routing without affecting production.

Month: 2025-01. Focused on infrastructure configuration hygiene across two repositories by removing a duplicate Terraform variable to prevent environment conflicts. Changes were non-functional (no runtime behavior changes) and aimed at reducing risk, improving maintainability, and enabling smoother future deployments.