Saif ur Rehman

Senior Software Engineer

Funsol Technologies • Full time

Mar 2021 - Present • 5 yrs 5 mos

• Architected and shipped Fit Streak — a Jetpack Compose gym-tracking app with custom animated workout flows, Hilt dependency injection, and offline-first Room database; achieved 4.6-star Play Store rating. • Led end-to-end development of Scoop Messenger, a real-time communication platform leveraging WebRTC (video/audio) and Socket.IO, reducing average call-setup latency by 25% and sustaining a 95%+ crash-free session rate. • Delivered Husky VPN and Bot VPN — secure tunnelling apps integrating OpenVPN/WireGuard protocols; combined installs exceeded 60K with Play Store 4.4 average rating. • Built a high-performance WhatsApp Status Saver / Video Downloader suite surpassing 100K+ installs; optimised media I/O with Kotlin Coroutines + Flow, cutting UI jank by 40%. • Integrated Google AdMob & Google Ad Manager across multiple utility apps, enabling a revenue stream that increased monetisation by 35% quarter-over-quarter. • Led a team of 4 Android engineers — conducted weekly code reviews (cutting defect escape rate by 20%), introduced branch-based CI/CD via GitHub Actions, and drove team velocity improvements of 30%. • Collaborated with product, QA, and UI/UX designers in remote-first Agile sprints, consistently shipping releases on schedule with zero P0 post-release incidents.