Computer Engineering student and software developer. Java 21 / Spring Boot in CrossQuery, plus production Web3: 40K+ users, a published npm package, Sui mainnet, and Stellar invoice tooling.
Production Web3 at OverBlock, plus Java / Spring Boot in CrossQuery
OverBlock, İzmir | Jul 2025 – Present
Started as an intern, now shipping backend APIs and frontend for blockchain-integrated products, including production deployments.
Software DeveloperJava 21 / Spring Boot
Multi-model ideation panel: research, cross-examine, vote, scored Top-3. JPA, Flyway, validation, background runs, rate limit, SSRF guard, tests and CI.
Java BackendSomiverse & mantle-402
Smart contracts, production fixes on a live platform with 40K+ users, PWA for mobile, and an npm package for HTTP 402 payments on Mantle.
Web3Java backend first, then the production Web3 work
Multi-model ideation panel. Models research, cross-examine, vote, and return a scored Top-3. JPA, Flyway, tests and CI.
Invoice, pay link or QR on Stellar, Horizon verification (memo, amount, destination), downloadable payment proof.
Smart contracts, production fixes on a live platform with 40K+ users, and a PWA conversion for mobile.
On-chain location bookmarking on Sui, shipped to mainnet.
HTTP 402 payment flows on Mantle, published as an npm package.
Real-time restaurant order tracking. TypeScript, Node.js, PostgreSQL.
Java 21 / Spring Boot, plus the stack I ship in production
Key moments in my professional journey
Backend APIs and frontend for blockchain-integrated products, including production deployments.
Open-source multi-model ideation panel with JPA, Flyway, tests and CI.
Contributed to a platform with 40,000+ active users. Resolved critical system issues and improved mobile experience by converting the app into a PWA.
Developed a 402 Payment Required-based payment system on Mantle network and published it as an npm package for developer integration.
Currently pursuing Computer Engineering degree at Manisa Celal Bayar University.
Graduated from Ege University with a degree in Computer Programming.
Served as Student Representative at Manisa Celal Bayar University. Facilitated communication between students and administration, managed feedback processes, and actively participated in organizational and representation duties.
Focused on Java / Spring Boot, with production Web3 behind me. Open to internships and junior backend roles.