Ahmet Fahri Yener

About

I am a software developer with 8+ years of experience in mobile app development, shipping products end to end on iOS and Android. I have taken active roles in building scalable, real-time mobile apps serving millions of users in security-critical, high-performance sectors such as e-commerce, finance and insurance.

Throughout my career I have owned more than development: architecture decisions, CI/CD automation, testing and App Store / Google Play releases. Going forward, I aim to take on Technical Leadership and Architecture responsibilities in complex systems that demand real-time data streams, low latency and high security standards, building sustainable and modular (Clean Code) structures.

Experience

1. 01.2026 – Present

   Freelance & Own Products

   Freelance iOS Developer

   • I build and publish my own mobile products: Go On: Bulmaca, Go On: Passaparola, Rowtr and TinyDays.

   See projects
2. 09.2024 – 01.2026

   Bimser Çözüm

   Senior iOS Developer

   • Took an active role in Bimser's mobile product ecosystem for enterprise business apps, most notably eBA Plus, which serves millions of users.
   • Worked on the eBA Plus iOS app from scratch, owning it end to end: analysis, architecture, development, integration, testing and App Store release.
   • The app uses a hybrid architecture built on REST APIs and JavaScript messaging (WebView–Native communication); I took an active part in designing, building and sustaining this low-latency communication layer.
   • Handled bug analysis, fixes and new development on Bimser's other mobile apps such as Synergy, BEAM and QDMS.
   • Took an active part in decisions on architecture, technology selection and development approach for upcoming mobile apps.
   • Contributed to knowledge sharing, problem solving and better development processes within the team.
   • Used Instruments and performance analysis tools to find and fix memory leaks, crashes and performance bottlenecks.
   • Improved maintainability through modular development and streamlined App Store release processes with CI/CD.

   See projects
3. 03.2024 – 09.2024

   Freelance

   Freelance iOS Developer

4. 11.2022 – 03.2024

   Koçtaş

   Senior iOS Developer

   • Built new integrations and kept the existing architecture sustainable in a high-traffic e-commerce app, and helped deliver the app reliably to users.
   • Worked in a 4-person mobile team inside a 13-person agile team, contributing to development, testing and release.
   • Tracked and resolved production issues in real time with Firebase Analytics and Crashlytics, taking app performance and user experience to the next level.

   See projects
5. 10.2020 – 11.2022

   Doğuş Teknoloji

   iOS Developer

   Employed by Berkut Teknoloji; worked at Doğuş Teknoloji as an outsourced engineer.

   • Developed Android and iOS applications.
   • Used Java, Swift and Objective-C; the MVVM, MVC and CleanSwift architectures; and RxSwift and Combine.
   • Took an active role in Volkswagen Commercial Vehicles, Volkswagenim, benimAudim, Scania'm Cepte and VDF (Insurance/Finance).
   • Used Azure for CI/CD and worked with Agile principles.
   • From 05.2022 to 11.2022, worked on the iOS development of Garanti Teknoloji's CepPOS app on behalf of Doğuş Teknoloji.

   See projects
6. 03.2020 – 10.2020

   Enqura Teknoloji

   iOS Developer

   • Used MVVM and RxSwift and wrote unit tests.
   • Worked on the AXA Acentem, AXAFit and Groupama apps.

   See projects
7. 09.2018 – 10.2019

   Anonimya Teknoloji

   iOS Developer

   • Part of the teams behind AndroTürk and RadioBox, and built the Kazanım Kutusu app from scratch.
   • All UI was built programmatically.
8. 08.2017 – 08.2018

   Minerva Teknoloji

   Android Developer

   • Built the Android app of the startup Minerva from scratch.

Skills

Platforms & Languages

iOS (Swift, Objective-C)Android (Java, Kotlin)Python

UI & Frameworks

SwiftUIUIKitAutoLayoutProgrammatic UIJetpack Compose

Architecture & Design

MVVMClean ArchitectureMVCModular ArchitectureSOLID Principles

Concurrency & Reactive

async/awaitRxSwiftCombineKotlin Coroutines

Security

SSL PinningKeychain / Keystore ManagementSecure Data Storage (Cryptography)

Networking & Real-Time

RESTful APIWebSocketJSONWebView–JS Bridge

Tools, Performance & CI/CD

Instruments (Memory/Crash Profiling)Firebase (Crashlytics, Analytics)XCTest (Unit/UI Testing)GitAzure DevOpsSPMCocoaPodsDockern8n

Location Services

MapKitCoreLocation

Education

Volunteering