Radun is available for hire
Hire RadunRadun Çiçen
Verified Expert in Engineering
iOS Developer
Lisbon, Portugal
Toptal member since June 17, 2021
Bio
Radun is a senior iOS engineer with nearly six years of experience in mobile app development. He has published over nine high-quality apps, gaining expertise in both startups and large corporations. Skilled in building apps using SOLID principles and clean architecture, he ensures modular, scalable codebases. Radun is an expert in SwiftUI and UIKit and has experience with Objective-C.
Portfolio
DİAS Teknoloji
SwiftUI, UIKit, Swift, Clean Architecture, Modular Design, Leadership...
ArtSync App
SwiftUI, The Composable Architecture (TCA), Augmented Reality (AR)...
Hepsiburada.com
SwiftUI, UIKit, Dependency Injection, Modular Design, MVVM-C...
Experience
- Swift - 5 years
- CocoaPods - 5 years
- App Store - 5 years
- Firebase - 2 years
- SwiftUI - 2 years
- Cloud Firestore - 1 year
- StoreKit - 1 year
- Realm - 1 year
Availability
Full-time
Preferred Environment
Xcode, Slack, SourceTree, Zeplin, Swift
The most amazing...
...: Founded, developed, and launched ArtSync, an AR app that empowers artists to trace images on any surface with precision, multiple layers, and creative tools.
Work Experience
iOS Lead and Architect
2024 - PRESENT
DİAS Teknoloji
- Architected, built, and launched the national vehicle detection system iOS app, called UTTS, from scratch with a modular architecture and clean coding principles, ensuring scalability and maintainability. Deployed it to the App Store.
- Developed multiple reusable Swift Package Manager (SPM) modules and UI components, reducing code duplication and accelerating development across related applications.
- Designed and implemented Xcode templates and code snippets to streamline development, cutting boilerplate code and improving efficiency across teams.
- Led senior iOS developer interviews and played a key role in hiring and structuring the iOS development team to support both UTTS and other company projects.
- Collaborated with senior developers to refine the company's architecture, contributing to the development of scalable super apps for future projects.
Technologies: SwiftUI, UIKit, Swift, Clean Architecture, Modular Design, Leadership, Architecture, Async/Await
Founder
2023 - PRESENT
ArtSync App
- Designed, developed, and published my own app from scratch.
- Enhanced my expertise in app marketing and monetization strategies.
- Determined all the required features and milestones for the app. Prioritized tasks for the MVP app.
Technologies: SwiftUI, The Composable Architecture (TCA), Augmented Reality (AR), LocalStorage, Firebase, App Store, iOS Design Guidelines, RealityKit, Composable Architecture, Combine, Mobile Apps, Mobile App Development, iOS Native Libraries, LiDAR, RevenueCat, File Management, ARKit, Prototyping, Async/Await
Senior iOS Engineer
2024 - 2024
Hepsiburada.com
- Took over and built a payment module for an eCommerce application, integrating multiple payment options, improving the checkout process, and enhancing user experience.
- Directed and supported the development team in adopting a more unit-testable architecture, resulting in better code maintainability and software reliability.
- Assisted in creating a modular structure that allowed app modules to function independently as example projects, improving development workflow and flexibility.
Technologies: SwiftUI, UIKit, Dependency Injection, Modular Design, MVVM-C, Large-scale Projects, Clean Architecture
Senior iOS Engineer
2024 - 2024
Flatlander Studio, LLC
- Developed and launched the InTimer mobile app from the ground up, resulting in a crash-free application on the App Store, providing real-time playing time tracking for multiple sports.
- Implemented in-app purchases and offline data storage using Realm, enabling offline usage and ensuring seamless user experience even without internet connectivity.
- Advised the client on optimal development strategies, offering alternative solutions that reduced development time, enabling the client to stay within budget and meet time limitations.
Technologies: iOS, Swift, SwiftUI, Figma, In-app Purchase (IAP), Monetization, In-app Purchases, Clean Architecture, Prototyping, CI/CD Pipelines, Architecture
Senior iOS Engineer
2024 - 2024
Hepsiburada.com
- Implemented multiple alternative payment methods, enhancing the checkout and payment experience for users.
- Collaborated with a team of over 25 iOS developers, providing cross-functional support and resolving critical issues in various modules.
- Mentored and assisted two mid-level iOS engineers, improving their coding skills, reducing their issue resolution time, and enabling a more frictionless integration into the project.
Technologies: Swift, SwiftUI, Combine, Factory, Dependency Injection, Modular Design, MVVM-C, UIKit, SwiftGen, Sourcery, SourceTree, Git, Clean Architecture, Async/Await
iOS Developer
2021 - 2023
Toptal
- Developed two different apps that target connecting and increasing the interaction between queer people.
- Worked on and assisted the client in not only developing the app but also helping and guiding the app designs, shared my insights, and, in some parts, supported the recruitment process.
- Created an app that is component-based and modular. It allowed for fast development on the developers' side and offered testability implementations in case the client needed them in the future.
Technologies: Swift, iOS, SwiftUI, The Composable Architecture (TCA), Firebase, iTunes Connect, Apps, Mobile Development, Mobile, User Experience (UX), App Store, iOS Design Guidelines, Composable Architecture, Combine, Mobile Apps, Mobile App Development, iOS Native Libraries, Core Animation, Prototyping, Leadership, Architecture, Async/Await
iOS Developer | Team Lead
2020 - 2022
Codeway Studios
- Developed a scanner app that lets users edit, filter, and share multiple documents while keeping a crash-free rate of 99.9%.
- Created and managed a Jira board and implemented rules for smoother and faster task delivery.
- Managed the App Store and TestFlight versioning and release processes.
- Implemented and maintained a detailed event and error logging structure for fixing bugs and understanding user behaviors.
- Participated actively in the design process and supported the designer for better UI designs that were in sync with design guidelines.
Technologies: Swift, Git, SourceTree, iOS, CocoaPods, Core Image, Realm, StoreKit, App Store, iOS Design Guidelines, Jira Administrator, Kanban, Agile Sprints, Team Management, Core Data, Firebase, Crashlytics, TestFlight, iTunes Connect, Apps, iOS SDK, Mobile Development, Mobile, AVFoundation, User Experience (UX), Lottie-iOS, Lottie, LocalStorage, Combine, Mobile Apps, Mobile App Development, iOS Native Libraries, File Management, Core Animation, Clean Architecture, Prototyping, CI/CD Pipelines, Leadership
iOS Developer
2018 - 2020
Armut.com (HomeRun)
- Developed and worked on two apps that connect users (clients) to home services providers in an online marketplace.
- Migrated the provider app from Objective-C to Swift.
- Built a live chat SDK and UI used by the client and provider apps to connect clients and providers.
- Developed a network SDK that can automatically create and update current back-end APIs with a single terminal command.
Technologies: Swift, Objective-C, Git, SourceTree, Bitbucket, CocoaPods, Live Chat, Model View ViewModel (MVVM), Model View Controller (MVC), Core Data, Crashlytics, New Relic, Swagger, APIs, SDKs, iOS, iTunes Connect, Apps, iOS SDK, Mobile Development, Mobile, User Experience (UX), App Store, iOS Design Guidelines, Stripe, Mobile Apps, Mobile App Development, Large-scale Projects, CI/CD Pipelines
Experience
Document and Photo Scanner – Scanner+
https://apps.apple.com/us/app/pdf-scanner-app-scanner-docs/id1504202283I developed and launched Scanner+, a mobile application that transforms iPhones into powerful scanning devices. The app allows users to scan, sign, and share documents in PDF, JPG, and TXT formats and digitize photos with enhanced features for restoration and colorization.
KEY FEATURES
• Multi-page PDF creation with automatic edge detection and image enhancement.
• High-quality scans of printed photos with auto-cropping and color enhancement.
• Optical character recognition for converting scanned documents into searchable text.
• Converts photos and images into searchable PDF files.
• Tools to sign, crop, highlight, and edit documents.
• Seamless export to various platforms, including iMessage, Gmail, Dropbox, Google Drive, and more.
Scanner+ provides a complete solution for managing, organizing, and securing scanned documents on their iPhones. It offers advanced features for document editing, translation, and cloud integration. Available on the App Store.
KEY FEATURES
• Multi-page PDF creation with automatic edge detection and image enhancement.
• High-quality scans of printed photos with auto-cropping and color enhancement.
• Optical character recognition for converting scanned documents into searchable text.
• Converts photos and images into searchable PDF files.
• Tools to sign, crop, highlight, and edit documents.
• Seamless export to various platforms, including iMessage, Gmail, Dropbox, Google Drive, and more.
Scanner+ provides a complete solution for managing, organizing, and securing scanned documents on their iPhones. It offers advanced features for document editing, translation, and cloud integration. Available on the App Store.
ArtSync: Augment Reality Image Tracing Studio
https://apps.apple.com/pt/app/ar-tracing-projector-artsync/id6464393188As the founder, I designed, developed, and launched ArtSync, an augmented reality (AR) art tracing app designed to enhance creativity for artists, hobbyists, and creative enthusiasts. It enables users to trace images onto any surface and offers various tracing styles and tools to support artistic exploration.
KEY FEATURES
• Advanced AR-style tracing for precision and intricate details and classic tracing modes for quick, effective work.
• Create, organize, and experiment with multiple layers and sublayers for flexible artistic control.
• Fine-tune image movement pixel by pixel for maximum accuracy, with additional tools such as camera, grid, and AR features.
• Record high-quality artistic sessions, including time-lapse options to document and share creative processes.
• Save, group, and favorite projects, offering comprehensive control over artwork.
• Transform your device into a light table for seamless image tracing.
ArtSync provides an intuitive, guided user experience and integrates advanced tracing and drawing tools, allowing users to visualize and create with precision.
KEY FEATURES
• Advanced AR-style tracing for precision and intricate details and classic tracing modes for quick, effective work.
• Create, organize, and experiment with multiple layers and sublayers for flexible artistic control.
• Fine-tune image movement pixel by pixel for maximum accuracy, with additional tools such as camera, grid, and AR features.
• Record high-quality artistic sessions, including time-lapse options to document and share creative processes.
• Save, group, and favorite projects, offering comprehensive control over artwork.
• Transform your device into a light table for seamless image tracing.
ArtSync provides an intuitive, guided user experience and integrates advanced tracing and drawing tools, allowing users to visualize and create with precision.
InTimer – Youth Sports Playing Time Tracker
https://apps.apple.com/us/app/intimer-youth-sports-timer/id6553995199I developed and launched InTimer, a mobile application designed to assist volunteer parent coaches in tracking and managing playing time for youth sports teams. The app provides real-time tracking and ensures fair, equal playing time for all athletes across various sports, including soccer, basketball, hockey, and more.
KEY FEATURES
• Real-time playing time tracking for multiple sports
• Efficient substitution management for fair playtime
• Custom lineup creation and saving for easy game setup
• Season-long cumulative playing time tracking for each athlete
InTimer improves game management, promotes fair play, and enhances communication between coaches, parents, and players. The app supports balanced athlete participation, fostering a positive environment for player development. Available on the App Store.
KEY FEATURES
• Real-time playing time tracking for multiple sports
• Efficient substitution management for fair playtime
• Custom lineup creation and saving for easy game setup
• Season-long cumulative playing time tracking for each athlete
InTimer improves game management, promotes fair play, and enhances communication between coaches, parents, and players. The app supports balanced athlete participation, fostering a positive environment for player development. Available on the App Store.
Education
2010 - 2016
Bachelor's Degree in Industrial Engineering
Koç University - Istanbul, Turkey
2010 - 2016
Bachelor's Degree in Mechanical Engineering
Koç University - İstanbul, Turkey
Skills
Libraries/APIs
CocoaPods, Lottie-iOS, iOS Native Libraries, Core Animation, Core Image, Alamofire, LocalStorage, Stripe
Tools
Xcode, Slack, SourceTree, Zeplin, iTunes Connect, Git, GitHub, GitLab, Jira, Bitbucket, Crashlytics, TestFlight, Fastlane, OneSignal, Auto Layout, CircleCI, SwiftGen, Sourcery, Figma
Languages
Swift, Swift 4, Swift 5, Objective-C
Frameworks
UIKit, SwiftUI, Combine, StoreKit, Core Data, Swagger, iOS SDK, RealityKit, RealmSwift, ARKit
Paradigms
Model View ViewModel (MVVM), Model View Controller (MVC), Mobile Development, Kanban, Dependency Injection, Modular Design, Clean Architecture
Platforms
iOS, Firebase, Mobile, New Relic, RevenueCat
Storage
Realm, Cloud Firestore
Other
App Store, iOS Design Guidelines, User Interface (UI), Apps, Lottie, Mobile Apps, Mobile App Development, Prototyping, Team Management, UI Animation, iOS Camera, Biometrics, Composable Architecture, User Experience (UX), File Management, Large-scale Projects, Leadership, Architecture, Async/Await, Jira Administrator, Agile Sprints, Live Chat, Optical Character Recognition (OCR), Object Detection, Industrial Engineering, Mechanical Engineering, APIs, SDKs, In-app Purchases, Frameworks, The Composable Architecture (TCA), AVFoundation, Augmented Reality (AR), Solopreneurship, LiDAR, Factory, MVVM-C, In-app Purchase (IAP), Monetization, CI/CD Pipelines
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