James Coggan

February 2025 – Present · Remote, Spain

• Improved Android crash-free sessions rate from 98% to 99.9% — 10x reduction in user-facing crashes
• Scaled test coverage from 50 to 2,000+ tests (40x); introduced screenshot testing
• Designed and built a custom E2E testing CLI + DSL — same class of tooling built at Meta
• Reduced delivery time by 66% with fewer bugs through incremental delivery
• Pioneering AI-assisted engineering workflows to multiply developer output

April 2021 – November 2024 (3 years 8 months) · Remote / London

• Reduced Android instrumentation test flakiness by 80%
• Led migration of Android + iOS screenshot tests to unified infrastructure, cutting capacity usage by 50%
• Upgraded 1 billion daily Android, iOS, and Chrome tests to latest platform versions
• Redesigned UI/UX of Meta's primary E2E testing solution for 150k+ weekly test executions
• Top 3 interviewer in the organisation for H1 2024 (62 behavioural interviews)

January 2023 – January 2024 · Remote, Spain

• Architected full Android stack from scratch: Kotlin, Jetpack Compose, Coroutine Flow, Circuit (Slack)
• Integrated GPS, gRPC, REST (Retrofit), Room, DI (Dagger/Hilt)
• Full test coverage: instrumentation tests, JUnit, mocking

March 2018 – May 2022 · London

• Selected by Google for outstanding expertise in developer technologies
• Represented Google at Droidcon Tel Aviv, GDG DevFest Kansas City, GDG DevFest Minneapolis, GDG London
• Mentored developers globally on Android and IoT platforms

June 2018 – April 2021 · London

• Led mobile engineering team delivering Android and iOS apps to 21 global markets
• Redesigned team processes, increasing delivery efficiency by 300% while reducing bug ratio by 75%
• Mentored engineers; drove cross-functional collaboration across engineering, design, and product

June 2015 – June 2018 · London

• Set up entire mobile CI/CD pipeline on Bitrise from scratch
• Led architectural redesign of mobile apps
• Transitioned mobile development in-house