Independent software and game developer
Mustafa Erhan
Kaya
I’m Mustafa Erhan Kaya, also known as Erhan Kaya, an independent software and game developer based in Istanbul, Türkiye. I build mobile apps, games and game developer communities.
My projects include the word game ZINK!, the crowd forecasting app DuckIn and the gaming library Pyralis. My work spans application development, backends, data pipelines and the process of shipping a product.
I am a founding leader and director of IGDA Istanbul and a co-founder of Bahçeşehir University’s BUG Zone game development club. I previously led ÜNOG, a game developer community, as a director for two years.
Games and applications
ZINK!
ZINK! is a mobile word game built around a clue and a letter count. Revealing letters costs points, making the decision to solve without help central to each round. It offers Turkish and English content, daily challenges and crossword puzzles.
Read the project storyDuckIn
DuckIn is a mobile app that helps you understand how crowded a place may be before you go, and when it might be calmer. It combines place discovery with hourly crowd forecasts in Istanbul, Ankara and İzmir.
Read the project storyPyralis
Pyralis is a mobile product that brings scattered gaming libraries, reviews and player history together. It connects digital games and tabletop experiences in a shared player profile.
Read the project storyCommunity leadership
2025 – present
IGDA Istanbul
Founding leader and director
2023 – 2025 · Two years as director
ÜNOG
Director
2023 – 2024
BAU BUG Zone
Founding board member and vice president
How I build
I work with Flutter and Dart for mobile applications, and Unity and C# for game development. My backend work uses PostgreSQL and Supabase, with PostGIS for geographic data and Ruby and CI/CD for automation and delivery. In games, I focus on offline play, deterministic game logic and server-side score verification. In mobile products, I connect data pipelines to practical user experiences.
Official profiles
Quick answers
Who is Mustafa Erhan Kaya?
Mustafa Erhan Kaya is an independent software developer, game developer and community leader based in Istanbul, Türkiye. Also known as Erhan Kaya, he works on ZINK!, DuckIn and Pyralis.
Which communities has he helped lead?
He is a founding leader and director of IGDA Istanbul, a founding board member and former vice president of BAU BUG Zone, and a former ÜNOG director, having led the community for two years during 2023–2025.
What are ZINK! and DuckIn?
ZINK! is a word and puzzle game with independently written Turkish and English content. DuckIn is a mobile app that forecasts how crowded venues may be and helps people choose when to visit.
How can I get in touch?
For software, game development and community collaborations, contact me by email or LinkedIn.