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Hi, I’m Emile Petrinski, a senior iOS and mobile engineer with extensive experience delivering high-performance, user-centric apps across banking, automotive, and airline sectors. I specialize in Swift, SwiftUI, Core Data, and cloud/backend integration (GraphQL, REST), with a passion for clean, maintainable code and scalable architectures. I lead cross-functional teams from concept to App Store delivery, designing modern architectures (VIPER, MVVM, The Composable Architecture) and implementing automated testing. I’m focused on refining user flows with designers, collaborating with backend/DevOps, and shipping polished experiences that meet security and regulatory requirements, while continuously improving development velocity.…Hi, I’m Emile Petrinski, a senior iOS and mobile engineer with extensive experience delivering high-performance, user-centric apps across banking, automotive, and airline sectors. I specialize in Swift, SwiftUI, Core Data, and cloud/backend integration (GraphQL, REST), with a passion for clean, maintainable code and scalable architectures. I lead cross-functional teams from concept to App Store delivery, designing modern architectures (VIPER, MVVM, The Composable Architecture) and implementing automated testing. I’m focused on refining user flows with designers, collaborating with backend/DevOps, and shipping polished experiences that meet security and regulatory requirements, while continuously improving development velocity.

Emile Petrinski

App Developer, Programmer, UI Designer, +6

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Hi, I’m Emile Petrinski, a senior iOS and mobile engineer with extensive experience delivering high-performance, user-centric apps across banking, automotive, and airline sectors. I specialize in Swift, SwiftUI, Core Data, and cloud/backend integration (GraphQL, REST), with a passion for clean, maintainable code and scalable architectures. I lead cross-functional teams from concept to App Store delivery, designing modern architectures (VIPER, MVVM, The Composable Architecture) and implementing automated testing. I’m focused on refining user flows with designers, collaborating with backend/DevOps, and shipping polished experiences that meet security and regulatory requirements, while continuously improving development velocity.…Hi, I’m Emile Petrinski, a senior iOS and mobile engineer with extensive experience delivering high-performance, user-centric apps across banking, automotive, and airline sectors. I specialize in Swift, SwiftUI, Core Data, and cloud/backend integration (GraphQL, REST), with a passion for clean, maintainable code and scalable architectures. I lead cross-functional teams from concept to App Store delivery, designing modern architectures (VIPER, MVVM, The Composable Architecture) and implementing automated testing. I’m focused on refining user flows with designers, collaborating with backend/DevOps, and shipping polished experiences that meet security and regulatory requirements, while continuously improving development velocity.

Available to hire

Hi, I’m Emile Petrinski, a senior iOS and mobile engineer with extensive experience delivering high-performance, user-centric apps across banking, automotive, and airline sectors. I specialize in Swift, SwiftUI, Core Data, and cloud/backend integration (GraphQL, REST), with a passion for clean, maintainable code and scalable architectures.

I lead cross-functional teams from concept to App Store delivery, designing modern architectures (VIPER, MVVM, The Composable Architecture) and implementing automated testing. I’m focused on refining user flows with designers, collaborating with backend/DevOps, and shipping polished experiences that meet security and regulatory requirements, while continuously improving development velocity.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Mobile Engineer at Himalaya Exchange, Abu Dhabi

April 1, 2021 - Present

Inherited a React Native app from an external agency; maintained and delivered new feature development while stabilizing production and preparing a full in-house rebuild. Led code reviews, implemented CI for mobile builds, and improved release processes to enable smoother, more reliable deployments.

Lead Mobile Engineer at Himalaya Exchange

April 1, 2021 - Present

Lead development of a React Native app (TypeScript) inherited from an external agency; maintained and delivered new feature development while stabilising production and preparing a full in-house rebuild. Architected and led development of fully native iOS and Android apps (Swift, SwiftUI, TCA; Kotlin, Jetpack Compose), implementing a composable modular architecture that reduced code duplication by 40% and improved feature scalability. Leveraged iOS App Clips to isolate single-use flows, cutting build times and accelerating UX previews and QA testing by 30–40%. Led architecture and technical strategy, aligning mobile with backend microservices, DevOps workflows, and roadmaps including Layer 2 scaling, biometric security, and cold wallet integration. Improved app startup time by 40% and reduced crash rates to under 0.2% through targeted refactoring and debt resolution. Collaborated closely with design to refine user flows for a smooth onboarding experience. Developed automated and manu

Senior Mobile Engineer at Emirates Group

April 1, 2020 - March 1, 2021

Spearheaded department-wide SwiftUI implementation across iOS modules; defined technology choices, migration patterns, and best practices. Migrated multiple modules from Objective-C/UIKit to Swift/SwiftUI, improving maintainability and accelerating view development by 3–4×. Converted module dependencies from CocoaPods to Swift Package Manager and integrated SwiftUI with VIPER across iOS teams. Provided hands-on technical guidance, conducted code reviews, and ensured unit/UI test coverage for stable feature delivery. Worked in a cross-functional, multi-country architecture to support localised modules (Germany, Spain) and supported remote teams.

Senior Mobile Engineer at ING Group N.V.

October 1, 2019 - March 1, 2020

Solely developed the Transaction Details module for iOS, iPadOS, and WatchOS, migrating views from UIKit to SwiftUI; reduced code size by 40–60% and improved readability, maintainability, and bug reduction. Implemented the module using MVVM with coordinating controllers, following INGA modular design; migrated dependencies from CocoaPods to Swift Package Manager; rotated across cross-functional iOS teams to provide hands-on guidance and ensure consistent UI/UX across apps.

Lead Mobile Engineer at Volvo Cars AB

January 1, 2015 - August 1, 2019

Led the iOS SDK team (four developers) in a cross-functional mobile setup, architecture decisions, tech choices, task allocation, and code reviews. Designed a modular SDK architecture for car connectivity, offline persistence, and third-party integrations, achieving 30–40% reduction in code duplication. Implemented robust unit testing with XCTest and CI/CD pipelines; led client-facing onboarding and ensured high-quality feature delivery.

Senior Mobile Engineer at Semcon AB

January 1, 2014 - December 1, 2014

Worked on two Greenfield domestic projects: a portable cooler app and an RV control system, focusing on real-time monitoring of hardware devices. Contributed as a sole iOS developer across multiple versions, collaborating closely with embedded engineers, backend engineers, and UX designers to connect hardware, backend services, and user interfaces. Developed custom graphical interfaces using Core Graphics and Core Animation to visualize cooler components, RV dashboards, temperature gauges, and sensor readings.

Mobile Engineer at FSB Tech Ltd

January 1, 2009 - November 1, 2013

Built the company’s first iOS mobile platform from scratch, delivering white-label apps for high-profile clients. Designed a modular SDK with a core layer (authentication, profiles) and industry-specific libraries (sports betting, horse racing, tennis) to optimize memory usage and app size. Integrated live odds via WebSockets and cached non-time-sensitive data via Core Data for offline viewing; implemented compliance features (geo-fencing for regulated markets). Managed beta distributions via TestFlight and built a scalable CI/CD pipeline using Fastlane and Jenkins for automated SDK/app builds.

Mobile Engineer at Cimex Ltd

April 1, 2008 - June 1, 2009

Sole iOS developer for early-stage mobile projects at a digital agency transitioning into mobile. Built a real-time traffic reporting app for Direct.gov using Objective-C, UIKit, URLsession, and MapKit; integrated REST APIs to display live traffic incidents. Developed an annual report viewer app for Aviva PLC enabling board members to browse multi-year reports on iPad with on-device PDF caching. Managed end-to-end App Store deployment and beta testing via TestFlight for client apps. Pioneered mobile development practices in a security-sensitive environment.