Koray Ergin
Senior Software Development Engineer at Freelance
Istanbul, Istanbul, Türkiye Turkey
Summary
👤
Senior🎓
Top SchoolKoray Ergin is a senior software development engineer based in Istanbul with eight years of experience building Java-based cloud and enterprise systems. He has delivered IoT and banking solutions using Spring, Angular, PostgreSQL and messaging middleware at Siemens and Yapı Kredi, and recently focused on digital asset custody workflows and reconciliation for crypto operations. Comfortable across backend and integration work, Koray has hands-on experience migrating PL/SQL to Java and automating end-of-day financial notifications and wallet balance tracking for cold/hot storage. An active crypto enthusiast since 2017, he works with Ethereum and several L2s, bringing practical blockchain familiarity to traditional banking contexts. Known for translating complex regulatory and operational requirements into reliable, auditable systems, he blends R&D rigor with production-minded delivery.
8 years of coding experience
8 years of employment as a software developer
Kagıthane Anatolian High SchoolBachelor's degree Computer Engineering, Bachelor's degree Computer Engineering at Kocaeli University
Turkish, İngilizce, German
Stackoverflow
11reputation
2kreached
4answers
0questions
Github Skills (6)
iis6
gtk6
flask-wtforms6
python6
flask6
recaptcha6
Github contributions (5)
TugayIpek/Hashtag-Analyzer
Nov 2020 - Jan 2021
Contributions:17 commits, 16 pushes, 1 branch in 2 months
mfurkanergin/web-teknolojileri-projesi
Apr 2022 - May 2022
Contributions:14 pushes, 1 branch in 22 days
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