Sohrab Yaghoubi

Profile

iOS engineer with 14+ years building native consumer apps at scale at Microsoft (OneDrive, Teams, Stream) and Rogers Media (Sportsnet). Combines deep Swift/UIKit/SwiftUI and AVFoundation expertise with cross-team technical direction, performance engineering, and mentorship, including four years teaching iOS at the University of Toronto.

Technical Expertise

iOS & media: Swift, Objective-C, SwiftUI, UIKit, Combine, Swift Concurrency, AVFoundation, iOS SDK, watchOS, tvOS, Xcode, Instruments, LLDB

Architecture & integration: Native mobile architecture, C++, SQLite, SwiftData, CloudKit, REST and SharePoint Online APIs, deep linking, performance profiling, telemetry, accessibility

Engineering effectiveness: XCTest, XCUITest, Xcode Test Plans, CI/CD, Azure DevOps, GitHub Actions, automated diagnostics, release-quality metrics

AI-assisted development: Claude Code, Codex, GitHub Copilot, and MCP-based workflows

Professional Experience

Senior Software Engineer, iOS | Microsoft (February 2021 – Present)
OneDrive, OnePlayer, Teams, and Stream
- Led the OneDrive iOS Files, Photos, and Library search modernization: defined a shared C++ middleware for API and service calls and SQLite data handling, later adopted by Android, and built the iOS search and filtering UI on it with >90% unit-test coverage.
- Drew on prior OnePlayer team experience to improve OnePlayer, Microsoft’s video playback library, and optimize iOS playback across OneDrive and Teams, cutting p95 startup latency from 12s to 4s (67%) for 15M+ monthly users.
- Shipped inline video playback for OneDrive iOS at >99% playback success rate, driving >10% growth in video usage and >15% growth in video sessions.
- Designed an iOS UI-test platform (Xcode Test Plans, smart retries, diagnostics, recorded runs, dashboards) adopted by 30 engineering teams; added 20+ high-value Files and Photos scenarios, cut CI pipeline time by ~30%, and reduced flaky-test failures by 30%.
- Mentored three Microsoft interns who subsequently earned full-time software engineering roles at Microsoft; all have since progressed to Software Engineer II.
iOS / tvOS Software Engineer | Rogers Media (August 2017 – February 2021)
- Built on-demand video streaming experiences for Sportsnet on iOS and tvOS, serving millions of viewers during major sporting events.
- Built and maintained native iOS and tvOS apps for CityNews and Citytv, partnering with product, design, and service teams on feature delivery, production troubleshooting, and regular releases.

Earlier Engineering Experience

Senior Consultant, Mobile Development | CGI (July 2016 – August 2017)
Delivered native iOS applications for enterprise clients, including implementation, service integration, testing, and release.

Independent iOS Developer / Freelancer | Self-employed (January 2012 – July 2016)
Designed, implemented, and published consumer and business iOS apps and client projects, owning product development from concept to release.

Independent Products & Mentorship

NestLog: Designed, built, and published an independent baby-tracking app in 2025 using SwiftData and CloudKit; owned product decisions, application architecture, implementation, and release.

Other independent apps: Commands for Tesla, Sales Tax Calculator, My Receipts.

Instructor, iOS Development | University of Toronto (January 2018 – April 2022)
Taught native iOS engineering and supported developers learning practical app development.

Education & Research

B.Sc., Computer Engineering – Software | Ferdowsi University of Mashhad

TrackMaze research publication | Human-Computer Interaction International (HCII), 2018