Worked on the UKGovernmentBEIS/inspect_ai repository to deliver the Parallel Browser Sessions feature, refactoring the environment service to support multiple concurrent browser sessions and distinct contexts. This backend development effort focused on enabling clients to create and join separate sessions independently, improving concurrency and scalability for web automation tasks. The technical approach involved redesigning the environment service architecture to manage multiple environments and browser contexts, resulting in better isolation and reliability for browser-driven workflows. Utilizing Python and gRPC, the work emphasized concurrency management and robust tooling, laying a scalable foundation for future multi-session workloads without introducing major bug fixes during the period.