Android Developer at BiTaksi

Building Android apps
people use every day.

I'm Oğuz, an Android developer with 3+ years of experience shipping large-scale production apps with Kotlin and Jetpack Compose — from ride-hailing to telecom self-service used by millions.

Get in touch GitHub LinkedIn
3+ yearsProfessional Android
~17MMonthly users served at Türk Telekom
Kotlin · ComposeMVVM, MVI, multi-module
01

About

I'm currently developing the BiTaksi ride-hailing app with MVVM and MVI, where I integrated the BEX (formerly BKM Express) payment system and contributed to features like the Hep Kazan loyalty program, reservations and Priority Taxi.

Before that I worked on the Türk Telekom Online İşlemler app, focusing on performance, network security and release processes for an audience of roughly 17 million monthly users.

Outside work I build side projects with multi-module architectures and CI pipelines — it's how I keep learning and try ideas end to end.

Based in
Türkiye
Currently
BiTaksi
Focus
Android · Kotlin
Education
Marmara University
Languages
Turkish, English
02

My apps

RepFlow app icon

RepFlow: Gym Log & PR Tracker

Android & iOS · Health & Fitness

A simple, fast gym log: log a set in seconds, follow your progress with charts and estimated one-rep max, and stay consistent with PRs, streaks and an activity heatmap. No account, no sign-up.

Get it onGoogle Play Download on theApp Store
03

Experience

  1. BiTaksi

    Android Developer
    Mar 2026 — Present

    Working on BiTaksi, a ride-hailing & mobility app.

    • Contributed to major features including Hep Kazan (loyalty program), Reservation, Passenger Assistance and Priority Taxi.
    • Integrated the BEX (formerly BKM Express) payment system into the app's payment flow.
    • Worked on FCM push notifications for gRPC-based in-ride messaging between passengers and drivers, improving notification reliability.
    • Built new screens with MVI alongside the existing MVVM codebase, and reusable components for the shared UI library.
    • Configured debug-build network security so QA and developers can inspect traffic with tools like Proxyman.
    • Jetpack Compose
    • MVVM
    • MVI
    • Coroutines
    • Flow
    • Hilt
    • Retrofit
    • Firebase
    • Dengage

  2. Innova Bilişim Çözümleri

    Android Developer · Hybrid
    Sep 2023 — Mar 2026

    Worked on Türk Telekom Online İşlemler, used by ~17 million people every month.

    • Found and fixed errors that sent unnecessary requests to the servers, and optimized caching to cut request volume.
    • Supported SSL-related work to secure the app's network communication.
    • Built a custom progress view that lets users follow home-internet technical issues end to end.
    • Integrated third-party SDKs including Netmera and Sodec, and led knowledge-sharing workshops for the team.
    • Kotlin
    • Views
    • Caching
    • Network security
    • Netmera

  3. Orion Innovation

    Android Developer Intern
    Jun 2023 — Sep 2023
    • Contributed to migrating a WebRTC-based Java project to Kotlin.
    • Led the end-to-end migration process within the intern team.
    • Kotlin
    • Java
    • WebRTC
04

Side projects

Groceries Planner

Native Android · Multi-module · MVI

Create groups and build live shopping lists together. Getting ready for Google Play.

  • Firebase
  • Hilt
  • Retrofit
  • Deep links

ToGather

Native Android · Multi-module · MVI

Groups and events, with members' live locations on a map as the event time approaches.

  • Google Maps SDK
  • Firebase
  • Hilt
  • Permissions

Runique

Jetpack Compose · Multi-module · MVI

Track walks and runs and see detailed stats, with caching to reduce backend load.

  • Compose
  • Room
  • Ktor
  • Koin
  • Foreground services
05

Skills

Languages

  • Kotlin
  • Java

Architecture

  • MVVM
  • MVI
  • Clean Code
  • Multi-module

UI

  • Jetpack Compose
  • Views
  • Navigation
  • Coil
  • Glide

Async

  • Coroutines
  • Flow

Data & DI

  • Room
  • Retrofit
  • Ktor
  • Hilt
  • Koin

Cloud

  • Firebase
  • FCM
  • MongoDB
  • SQLite

Monitoring

  • Crashlytics
  • Firebase Analytics
  • Dataroid
  • Instana

Tooling

  • Git
  • GitHub Actions
  • Proxyman
  • Bitbucket
06

Education & more

Marmara University

B.Sc. Computer Engineering

2019 — 2024

Work and Travel, USA

Park attendant at Wilderness at the Smokies — ticketing and welcoming guests, while sharpening my English.

2022

Let's build something.

Open to conversations about Android roles, freelance work and interesting app ideas.

Email evirgenoguz@gmail.com GitHub @evirgenoguz LinkedIn in/evirgenoguz