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Onur Hızar

Software Engineer

Crafting games and backend systems

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About

I build web applications and multiplayer backends on secure Linux systems, and I'm pushing toward web games. I've been messing around with code since high school. After a detour through medical school, I committed to game dev in 2018 and stayed. Now I build my own games. I like keeping things simple, in code and in life. Outside coding hours, you'll find me at a piano, with a guitar, behind drums, or grinding Path of Exile.

Experience

  1. Present

    Independent Game Developer

    Designing and building web games, from gameplay and 3D rendering to multiplayer backends and server infrastructure. Hardening everything with security reviews and testing, running my own Linux servers on Docker, and handling deployment, monitoring, and maintenance.

    • PlayCanvas
    • Three.js
    • Phaser
    • TypeScript
    • JavaScript
    • Node.js
    • Go
    • WebSockets
    • PostgreSQL
    • Redis
    • Docker
    • Linux
    • Nginx
  2. 2025 - 2026

    Lead Backend Engineer at PKStudios

    Led backend development at PKStudios, building Node.js multiplayer systems and services backed by PostgreSQL. Owned system design and API development, hardened services with authentication, rate limiting, and security reviews, and backed it all with integration and load tests. Built in-house tooling to speed up the team, ran Docker-based deployments on AWS, and kept production fast and reliable.

    • NodeJS
    • JavaScript
    • TypeScript
    • Multiplayer Systems
    • WebSockets
    • PostgreSQL
    • Redis
    • Docker
    • AWS Cloud
    • CI/CD
    • Linux
  3. Aug 2024

    Software Engineer Intern at SabancıDx

    Developed a full-stack hotel reservation web application with a React and Tailwind frontend and a Spring Boot backend. Implemented Docker for containerization, deployed the application on AWS Cloud, and configured Nginx for SSL and performance optimization. Enhanced security by integrating Spring Security with JWT authentication and protecting the application from DDoS attacks using Cloudflare. Managed CI/CD pipelines to automate build and deployment processes, while handling server configuration and management on Linux.

    • React
    • Spring Boot
    • HTML
    • CSS
    • JavaScript
    • Tailwind
    • Docker
    • Linux
    • Nginx
    • AWS Cloud
    • Cloudflare
  4. 2023 - 2024

    Software Engineer at Gripiyon Games

    Software Engineer building multiplayer games with robust backend infrastructure. Combining game development expertise with backend engineering to create seamless online experiences. Handling everything from gameplay mechanics to server architecture and real-time multiplayer networking.

    • Unreal Engine
    • Godot Engine
    • Multiplayer Systems
    • Go
    • Nginx
    • Docker
    • PostgreSQL
    • Redis
  5. 2023

    Backend Engineer at Research Ecosystems

    Designed and built the backend for a content service app with Spring Boot: authentication, email verification, subscriptions with invoicing, and integration tests. Presented Spring Security to the team and added IP logging to block bad access attempts.

    • Java
    • Spring Boot
    • PostgreSQL
    • Docker
    • AWS Cloud
  6. 2018 - 2019

    Freelance Game Developer

    Made and published mobile games with GameMaker. Loved building games but wanted to understand the backend side properly, so I moved toward servers and databases.

    • C#
    • Unity
    • GameMaker
    • MySQL
    • PHP

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