Sinan Gunes, Developer in Ankara, Turkey
Sinan is available for hire
Hire Sinan

Sinan Gunes

Verified Expert  in Engineering

Android Developer

Ankara, Turkey
Toptal Member Since
January 27, 2020

Sinan is the worldwide 55th developer certified by Google as an associated Android developer who has been working on Android projects professionally for the past ten years. He created his first Android app 13 years ago and managed to sell it while studying engineering at university. Sinan is an expert on current Android technologies and has been working on IoT projects requiring a byte to byte programming.


Aiden Automotive Technologies, Inc - Main
Android, Java, Kotlin, C++, Encryption, Data Compression, User Permissions...
Swift, Java, Kotlin, Android, Dagger, Test-driven Development (TDD)...
COOLSIS Technologies
Kotlin, Java, Objective-C, .NET, Swift, iOS, Android, Software Architecture...




Preferred Environment

Sketch, Adobe Illustrator, Terminal, Xcode, IntelliJ IDEA, Figma

The most amazing...

...project I've developed is Ride | Austin, a copy of the Uber application, which managed to provide one million rides in the first year.

Work Experience

Chief Technology Officer

2021 - PRESENT
Aiden Automotive Technologies, Inc - Main
  • Created a connected car ecosystem using the Android Automotive operating system.
  • Built an Android application that ensures the actual app is always up-to-date and has correct permissions granted.
  • Developed an effective protocol for client-server communication within the environment.
Technologies: Android, Java, Kotlin, C++, Encryption, Data Compression, User Permissions, Dagger 2, Code Review, Task Analysis, Technical Hiring, AOSP, Android SDK, Coroutines, Android Automotive

Android Chief Architect

2018 - 2021
  • Led a team of up to seven Android developers, recruiting, managing, coaching them while structuring and engineering the apps.
  • Developed patient and practitioner apps where the system allows them to find and communicate with each other on a HIPAA compliant channel.
  • Used Jira, Fabric, Adjust, Amplitude, and Facebook tools to track down the health of the application and statistically success story.
  • Was in constant communication with the team leads from QA, iOS, server, product, design, and support.
Technologies: Swift, Java, Kotlin, Android, Dagger, Test-driven Development (TDD), Android Jetpack, Unit Testing, Healthcare, Software Architecture, PostgreSQL, Room, Model View ViewModel (MVVM), Scrum, Agile, HIPAA Compliance, Dagger 2, Code Review, Task Analysis

Mobile App Developer

2017 - 2021
COOLSIS Technologies
  • Developed an application for teachers where they can track students' attendance, give them assignments, grade homework and exams, and contact their parents.
  • Managed existing apps for students and parents who were using very old technology on which I had to refactor a lot of parts.
  • Helped create new APIs for the team working on the server side, helping debug existing issues from a mobile perspective.
Technologies: Kotlin, Java, Objective-C, .NET, Swift, iOS, Android, Software Architecture, Task Analysis

Android Architecture

2016 - 2017
  • Developed an app that provides a ride-sharing experience.
  • Led the Android team consisting of up to five developers.
  • Developed an Uber-like application within three months from scratch.
  • Managed to provide a million ride-sharing experiences within the first year.
Technologies: MySQL, Java, Kotlin, Android, Dagger, Unit Testing, Instrumentation Testing, Testing, Software Architecture, Code Review, Task Analysis

Mobile Application Developer

2015 - 2016
SIR/Sera Software
  • Co-founded a small startup company with a couple of friends from university.
  • Developed a secure communication application using the SignalR protocol.
  • Mentored a junior developer to his best in Android.
Technologies: Objective-C, Android, iOS, Java, C++, JNI, Node.js, JavaScript, PHP

An Austin-based telehealth product within a startup company funded with over $20 million. The product consists of two applications, one for patients and another for providers. It is a cloud-based, scalable architecture system. It was beneficial during the COVID-19 pandemic.

Ride | Austin
A Java-based ride-sharing application used in Austin. The first release was published in the first three months from scratch. Within the next nine months, we managed to provide one million ride-sharing experiences to the users.

I was one of the Android developers, and after a while, I was promoted to a team lead.

This is a hobby project that we planned with a friend five years ago, and now we managed to publish the first MVP to the stores. It is a totally serverless app that is run over Firebase Functions.

I am the only engineer developing iOS, Android, Flutter, and Functions code.

The project contains two apps: one for barbershops, written in Flutter, and another one for clients, written natively using Swift and Kotlin.
2014 - 2016

Master's Degree in Forensics

Gazi University - Ankara, Turkey

2006 - 2013

Bachelor's Degree in Electrical and Electronic Engineering

Bilkent University - Ankara, Turkey


Associate Android Developer, Worldwide #55th

Google Developers


Associate Android Developer, Worldwide #64th

Google Developers


RxJava 2, OpenGL, RxJava, Node.js


Android Jetpack, IntelliJ IDEA, Xcode, Terminal, Adobe Illustrator, Sketch, Metasploit, Figma


Dagger, Espresso, Dagger 2, Flutter, .NET, JNI, Mockito, Robolectric, Android SDK


Kotlin, Java, C++, Swift, JavaScript, Go, PHP, Objective-C


Model View ViewModel (MVVM), REST, Unit Testing, Testing, Test-driven Development (TDD), Scrum, Agile, HIPAA Compliance


Android, Firebase, Android Automotive, iOS

Industry Expertise



PostgreSQL, MySQL, Redis


Software Architecture, Rideshare Services, Code Review, Task Analysis, Instrumentation Testing, Technical Hiring, Bluetooth, Digital Forensics, Mobile Security, IoT Protocols, OWASP, Room, Encryption, Data Compression, User Permissions, AOSP, Coroutines

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.


Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring