Harun Işık
Senior Android Developer at Raiffeisen Bank International AG
Balıkesir, Türkiye Turkey
Summary
👤
Senior🎓
Top SchoolHarun Işık is a Senior Android Developer with 8 years of hands-on experience delivering performant mobile apps for startups and large banks, currently at Raiffeisen Bank International. He specializes in Kotlin and React Native, with deep practical knowledge of Dagger, Retrofit, Coroutines, Jetpack libraries, Clean Architecture and MVVM, and a track record of modernizing apps used by millions. Harun has shipped consumer-facing products that reached 500k+ users and contributed to a major banking app overhaul for 5 million customers, demonstrating both startup agility and enterprise-grade reliability. He thrives in cross-functional teams, practices CI/CD and unit testing, and moves quickly from requirements to production-quality code. Known for pragmatic problem solving and strong communication, he blends technical rigor with a designer-minded focus on user experience. Fluent in adapting stacks and tooling, he often drives performance optimizations and architecture improvements that aren’t obvious from job titles alone.
8 years of coding experience
7 years of employment as a software developer
University of MilanBachelor's degree Computer Engineering, Bachelor's degree Computer Engineering at Sakarya University
English, Turkish
Stackoverflow
101reputation
4kreached
1answer
2questions
Github Skills (52)
android-messaging10
rates10
android-chat10
balloon9
messaging9
kotlin9
chatview9
currency9
chat9
messaging-api9
jetpack-compose9
stream9
chat-sdk9
stream-chat8
api8
Programming languages (4)
Github contributions (5)
harrunisk/EasyList
Apr 2018 - Aug 2019
One page CRUD by using Nodejs, Express, MongoDB, Jade
Contributions:20 commits, 4 PRs, 18 pushes in 1 year 4 months
expressjsexpress-mongodbmongojavascriptexpress
harrunisk/CurrencyKeyboard
Jul 2021 - Jul 2021
Contributions:1 release, 69 commits, 2 PRs in 24 days
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