Berlin, Germany
Sepehr Behroozi
Senior iOS Software Engineer
I ship reliable iOS apps at scale — automating the release lifecycle, tracing performance regressions, and keeping crash-free rate high for tens of millions of monthly users.
- 10+years iOS
- 9apps in release
- 20Mmonthly active users
- 99.95%crash-free users
- weeklyrelease cadence
iOS engineer with 10+ years shipping and publishing apps at scale. At Delivery Hero I automate the release lifecycle for 9 apps serving ~20M monthly active users — moving the train from biweekly to weekly, raising crash-free users from 99.7% to 99.95%, and building the on-call and alerting infrastructure that keeps it that way. Several years deep in Swift, with solid hands-on Objective-C, and lately I've been shipping AI tooling that helps engineers develop, review, and ship faster.
Career trace
Berlin, Germany
- Automated the release flow for 9 apps shipping to ~20M monthly active users, taking the release train from biweekly to weekly using Fastlane, Bash, and Swift scripts on Bitrise.
- Lead engineer for error-monitoring standards and alerting; raised crash-free users from 99.7% to 99.95%.
- Established the 24/7 client on-call rotation for iOS and Android across verticals, built on that monitoring and alerting infrastructure.
- Drove the reduction of app-hang rate across domains, using CPU and Time Profiler, OSLog, and OSSignposter to measure and mitigate performance regressions.
- Shipped AI skills and MCP tooling for design-system migration, incident investigation, and PR review guidance.
Tehran, Iran
- Built payment applications including Ghabzino (utility bill payment inquiries) and Khalafi (traffic fine inquiry and payment).
- Lead developer for the iOS client of the MyTehran app.
Tehran, Iran
- Worked on the Alibaba online itinerary app — flight, bus, and train ticket booking and itinerary management.
Tehran, Iran
- Worked on a freight booking and tracking app pairing freight owners with truck and transit drivers.
Tehran, Iran
- Worked on a local business discovery and location-based social network app, with check-ins and venue ratings.
Skills
LanguagesSwift · SwiftUI · Objective-C · Reactive Programming · Swift Concurrency
Release & CI/CDFastlane · Bitrise · Bash · Multi-variant release automation
ReliabilityError monitoring · Alerting · On-call design · Crash & app-hang reduction
PerformanceXcode Instruments · CPU & Time Profiler · OSLog · OSSignposter
AlsoAI tooling & MCP · High-scale problem solving · Cross-team communication
Education
University of Zanjan2010 – 2015B.Sc. in Computer Software Engineering
Zanjan, Iran
