Hamza Ahmed Siddiqui
I am a mobile app engineer with over four years of experience in Swift, SwiftUI, and Objective-C, alongside hands-on exposure to hybrid application development.
About
I am a mobile app engineer with over four years of experience in Swift, SwiftUI, and Objective-C, alongside hands-on exposure to hybrid application development. I specialize in building scalable, testable mobile applications with clean architecture in Agile environments. I am committed to delivering high-quality user experiences backed by solid testing, both manual and automated.
In my career, I have developed secure and optimized financial applications, enhanced media experiences, and modernized legacy codebases for improved maintainability and performance. I am experienced in RESTful APIs, server-driven UI, cloud-based features, and automated CI/CD workflows to ensure efficient and reliable product delivery.
- 9 years' experience
- Joined August 2025
Languages
- EnglishAdvanced
- GermanAdvanced
Industry experience
- Software & Internet
- Financial Services
- Media & Entertainment
Work experience· 6 roles
Developed and optimized the Mercedes me Finance application, delivering secure contract document downloads, mileage tracking, and multiple payment method management (SEPA, credit cards, direct debit). Architected and migrated legacy UIKit flows to SwiftUI, reducing technical debt by 60% and improving maintainability and performance. Designed and implemented a high-performance document handling feature for large PDF downloads using URLSession and async/await to improve load times and reliability. Established robust quality practices, achieving over 80% unit test coverage with XCTest and automating PR validation workflows via GitHub Actions and Fastlane. Integrated advanced analytics and monitoring using Firebase event tracking to measure feature adoption and guide data-driven product decisions.
Led development and optimization of the Mercedes me Finance Application, delivering secure contract document downloads, mileage tracking, and payment method management (SEPA, credit cards, direct debit). Architected and migrated legacy UIKit flows to SwiftUI, reducing technical debt by 60% and improving maintainability and performance. Designed a high-performance document handling feature optimizing large PDF downloads using URLSession and async/await to enhance load times and reliability. Established robust quality practices with 80%+ unit test coverage using XCTest and automated PR validation workflows via GitHub Actions and Fastlane. Integrated advanced analytics and monitoring by adding Firebase event tracking to measure feature adoption and guide data-driven product decisions.
Developed personalized media experiences using AV Foundation and Media Player frameworks, including on-demand radio, video playback, and live news streaming with background audio. Enhanced cross-platform mobile delivery by maintaining and extending a React Native app, adding new features and resolving production issues on iOS. Implemented robust analytics with Firebase to track user engagement and retention, supporting data-driven product improvements. Modernized legacy codebases by refactoring Objective-C modules to Swift, improving maintainability and reducing bugs. Strengthened quality and release pipelines by achieving 75% XCTest coverage and optimizing CI/CD workflows with GitHub Actions, reducing deployment time by 40%.
Education
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