I build production software end-to-end — backend services, web apps and hardware-level integrations — mostly with Java / Spring Boot and React / TypeScript.
Software Engineer at Codexist (Istanbul).
- 🎓 BSc Computer Engineering, Sakarya University — graduated 2025
- 🧱 Domain-Driven Design, clean architecture, tested code — JUnit 5 · Testcontainers
- 🤖 AI-augmented development workflow: demanding features shipped fast, without cutting quality
- 📫 ozdemirosmantahir@gmail.com
Closed-source work at Codexist — full detail in the CV.
🏢 AI-Powered Real Estate Platform — a domain-driven backend behind two React apps, with LLM
pipelines that turn appraisal reports into structured property data.
Java 21 Spring Boot DDD jOOQ PostgreSQL Keycloak Redis RabbitMQ
🏧 Self-Service Gold-Retail Kiosk — an unattended retail product, from the backend down to POS
terminals and thermal receipt printers.
Spring Boot React Python / Flask Linux ESC/POS
🧩 Logic Loom — a Flutter puzzle app: 15 games, each with its own solver and generator.
Flutter Dart
| Project | What it is | Stack |
|---|---|---|
| SabisAverageCalculator ⭐ 22 | Chrome extension that calculates GPA from course grades directly inside Sakarya University's SABİS portal | JavaScript Chrome Extension |
| SmartTill | Microservices cash-register system: payment transactions behind an API gateway, Keycloak-secured auth, fully containerised | Spring Boot Keycloak Docker PostgreSQL |
| NonProfitHub | News & announcement management system for non-profit organisations, with separate admin and public interfaces | Vue.js Spring Boot |
| WGAN-GP + R-GCN | Generative model for small molecular graphs — Wasserstein GAN with gradient penalty over a relational GCN | Python Deep Learning |
| SABİS Halısaha Botu | Automation bot for the university's football-pitch reservation system | Python Automation |
