Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm a mobile app developer specializing in iOS (Objective-C, Swift, SwiftUI) and Android (Java, Kotlin, Jetpack Compose) platforms. I thrive in Agile environments, troubleshooting, feature implementation, and delivering app store releases across both iOS and Android. I value clean architecture, SOLID principles, and scalable code that stands up to real-world use.\n\nI enjoy collaborating with cross-functional teams, driving architecture decisions, and continuously improving performance, reliability, and user experience. I’m passionate about producing high-quality solutions and guiding projects from concept to release.…I'm a mobile app developer specializing in iOS (Objective-C, Swift, SwiftUI) and Android (Java, Kotlin, Jetpack Compose) platforms. I thrive in Agile environments, troubleshooting, feature implementation, and delivering app store releases across both iOS and Android. I value clean architecture, SOLID principles, and scalable code that stands up to real-world use.\n\nI enjoy collaborating with cross-functional teams, driving architecture decisions, and continuously improving performance, reliability, and user experience. I’m passionate about producing high-quality solutions and guiding projects from concept to release.

Marwan Aziz

App Developer, Web Developer, Developer, +3





I'm a mobile app developer specializing in iOS (Objective-C, Swift, SwiftUI) and Android (Java, Kotlin, Jetpack Compose) platforms. I thrive in Agile environments, troubleshooting, feature implementation, and delivering app store releases across both iOS and Android. I value clean architecture, SOLID principles, and scalable code that stands up to real-world use.\n\nI enjoy collaborating with cross-functional teams, driving architecture decisions, and continuously improving performance, reliability, and user experience. I’m passionate about producing high-quality solutions and guiding projects from concept to release.…I'm a mobile app developer specializing in iOS (Objective-C, Swift, SwiftUI) and Android (Java, Kotlin, Jetpack Compose) platforms. I thrive in Agile environments, troubleshooting, feature implementation, and delivering app store releases across both iOS and Android. I value clean architecture, SOLID principles, and scalable code that stands up to real-world use.\n\nI enjoy collaborating with cross-functional teams, driving architecture decisions, and continuously improving performance, reliability, and user experience. I’m passionate about producing high-quality solutions and guiding projects from concept to release.

Available to hire

I’m a mobile app developer specializing in iOS (Objective-C, Swift, SwiftUI) and Android (Java, Kotlin, Jetpack Compose) platforms. I thrive in Agile environments, troubleshooting, feature implementation, and delivering app store releases across both iOS and Android. I value clean architecture, SOLID principles, and scalable code that stands up to real-world use.\n\nI enjoy collaborating with cross-functional teams, driving architecture decisions, and continuously improving performance, reliability, and user experience. I’m passionate about producing high-quality solutions and guiding projects from concept to release.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Android App Developer at Asset Insights

August 1, 2025 - November 1, 2025

Built the Android version of the PodFlo app from scratch and delivered it to the Play Store for testing. Worked closely with backend, iOS, product, and QA teams, consuming REST APIs and WebSocket streams for real-time data. Structured the project for scalability and maintainability with clear module separation. Used Kotlin and Jetpack Compose with MVVM and a modular architecture. Implemented Hilt for dependency injection and enforced code quality with Lint and Detekt. Set up CI/CD pipelines and managed code through Azure DevOps.

Lead Mobile Developer at GymCatch

August 1, 2023 - August 1, 2025

Led feature development across iOS and Android, integrating REST and GraphQL APIs for core app functionality. Implemented and maintained payment flows using Stripe and GoCardless, including subscriptions and recurring payments. Proficient in Swift (iOS) and Kotlin (Android). Expertise in Xcode (iOS) and Android Studio (Android). Apply Agile for efficient project management. Optimise performance, scalability, and resilience with comprehensive unit and UI testing.

Mobile App Developer (Freelance / Self-Employed)

February 1, 2023 - Present

Delivered iOS and Android solutions for multiple clients, including IRIS Software Systems and FDP. Developed production features using Swift, SwiftUI, Objective-C, Kotlin, and Jetpack Compose. Integrated REST and GraphQL APIs for core application functionality. Owned full delivery lifecycle: architecture, CI/CD, testing, App Store & Play Store releases, and stakeholder collaboration.

iOS Engineer at BBC

August 1, 2022 - December 1, 2022

iOS development. Objective-C, Swift & SwiftUI. Agile Scrum. CD/CI (Jenkins, GitHub, Fastlane). CocoaPods. Bug fixing, adding new features and app store releasing. Jira project management. Unit & UI testing. Swift Package Manager

Co-Founder at APP4IDEA

August 1, 2019 - August 1, 2022

Co-Founder and Director of App4Idea; managed day-to-day company operations, specialising in Android and iOS development.

iOS Developer at Healthily (Your.MD)

August 1, 2020 - August 1, 2022

iOS development. Swift & SwiftUI. Agile Scrum. Support QA to get tasks done. CocoaPods. CD/CI (CircleCI, GitLab, Fastlane). Bug fixing, adding new features and app store releasing. Jira project management. Swift Package Manager

Mobile Developer at ERT

March 1, 2019 - June 1, 2020

Building SDKs and libraries used by other Apps. Reactive Swift. XCTest & XCUITest. Agile Scrum & SAFe. Scrum master. CocoaPods. CD/CI (TC, GitLab, Fastlane). Bug fixing and adding new features to iOS & Android Apps. Android & iOS localisation. Jira project management. Swift Package Manager

Mobile Developer at Conker Group

June 1, 2017 - February 1, 2019

iOS & Android development, CocoaPods. Bug fixing and adding new features to iOS & Android Apps. iOS Enterprise distribution. App Store distribution. Google Play Console distribution.

Mobile Developer at Music Magpie Entertainment

March 1, 2016 - June 1, 2017

iOS & Android development. Maintain and improve existing iOS & Android Apps. Business/Data Analysis frameworks integration using CocoaPods. App Store deployment and distribution. Google Play Console, distribution. TestFlight distribution.

Junior iOS Developer at Epyx Ltd

August 1, 2014 - March 1, 2016

iOS development. Maintain and enhance iOS & Android Apps. Fix incident issues. Provide advice and consultation for customer support. iOS & Android deployment.

Web Developer at De Montfort University

April 1, 2014 - July 1, 2014

Developing web pages using Drupal open source management tool. Project management. Integrate different APIs with Solr, to provide advanced search functionality.

iOS Research & Development at De Montfort University

June 1, 2013 - December 1, 2013

A good understanding how augmented reality Apps are work and implemented. Install and test iOS applications. Integrate 3D compatible frameworks with iOS. A Good understanding of the compatibility between iOS libraries and 3D modelling software. Mentor and use the device motion data.

Mobile App Developer (Freelance / Self-Employed) at Freelance / Self-Employed

February 1, 2023 - Present

Mobile Developer at ERT.

March 1, 2019 - June 1, 2020

Building SDKs and libraries used by other Apps. Reactive Swift. XCTest & XCUITest. Agile Scrum & SAFe. Scrum master. CocoaPods. CD/CI (TC, GitLab, Fastlane). Bug fixing and feature work for iOS & Android Apps. Localisation.

Junior iOS Developer at Epyx Ltd.

August 1, 2014 - March 1, 2016

iOS development. Maintain and enhance iOS & Android Apps. Fix incidents. Provide customer support guidance. iOS & Android deployment.