Hadi Sajjadi

Hadi Sajjadi

Senior Game Developer

hsajjadi47@gmail.com(+374)95901531Izmir, Turkiye

For the past 7 years I've built games across a wide range, starting with 3D racing titles, then moving into hypercasual and hybrid casual games that were made in just a few days, and later into free-to-play multiplayer live games that reached 5 million monthly users. That experience taught me when to move fast and when to write code that can survive years of updates. I work in Unity for most native projects and use Unity Playworks, Cocos Creator, or Pixi.js when targeting WebGL. I also lead teams of up to 7 developers and mentor junior programmers.

Work Experience

My professional journey

Karizma Game Studio

Senior Game Developer

Karizma Game Studio

Jun 2024 Present · Turkey · full-time

Led teams and live operations for free to play multiplayer games.

  • Shipped 4 live service multiplayer games from early builds through years of updates, with a combined 20M+ installs.
  • Built pipelines for backend services and live ops content so the team could push updates smoothly.
  • Led teams of developers and mentored interns and junior programmers on their daily work.
  • Wrote internal tools, reusable packages, and architecture guidelines that other projects adopted.
UnityC#SmartFoxServerWebSocketCocos CreatorWebGL
Inex Game Studio

Game Developer

Inex Game Studio

Jun 2022 Jun 2023 · Turkey · full-time

Prototyped and shipped games fast while automating the studio workflow.

  • Built 1 or 2 playable hypercasual prototypes every week to test new ideas and market potential.
  • Automated the build pipeline so testers got new builds in minutes instead of manually waiting around.
  • Developed hybrid casual games for external publishers based on their specific design requirements.
  • Cut repetitive steps out of the workflow so the studio could prototype and iterate faster.
UnityC#CI/CDGit
Unbound Game Studio

Game Developer

Unbound Game Studio

Jan 2022 May 2022 · Turkey · full-time

Built prototypes quickly and kept live games running.

  • Built hypercasual prototypes quickly to find the mechanics that players actually enjoyed.
  • Maintained older live games by fixing bugs, adding content, and keeping performance stable.
  • Worked on the studio framework that every other developer used to start new projects.
UnityC#
Artman Game Studio

Game Developer

Artman Game Studio

Jun 2017 Nov 2019 · Turkey · full-time

Wrote racing physics and multiplayer, then optimized for low-end phones.

  • Wrote vehicle physics and AI systems that controlled how cars drove and how opponents raced.
  • Optimized both CPU and GPU to keep the game running at 30 fps on phones with only 1GB of RAM.
  • Built real-time online multiplayer that kept competitive races smooth and responsive.
UnityC#MultiplayerMobile Optimization

Skills & Expertise

Technologies and tools I work with

Game Engines

UnityCocos CreatorPixi.js

Languages

C#TypeScriptPython

Web Technologies

WebGLUnity Playworks

Networking

MirrorNakamaSmartFoxServerWebSocket

Tools

Texture PackerSpine 2DFMODGit LFSPlastic SCM

CI/CD

GitHub ActionsGitLab CI/CDJenkinsJetBrains TeamCity

Projects

Explore my game development work

TasoTakht
Featured

TasoTakht

Mobile GamesLive Service

A popular dice game with live service features and multiplayer functionality.

UnityC#SmartFoxServerLive Service
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Mench | Ludo
Featured

Mench | Ludo

WebGL Games

Browser-based multiplayer board game built with WebGL technology.

UnityWebGLWebSocketMultiplayer
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Achmaz

Achmaz

Mobile GamesLive Service

Engaging dice game with strategic gameplay and social features.

UnityC#Multiplayer
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Nitro
Featured

Nitro

Mobile Games

High-performance mobile racing game optimized for low-end devices.

UnityC#Multiplayer
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Quiz of King: Reward Edition
Featured

Quiz of King: Reward Edition

Mobile GamesLive Service

Successful spin-off of the Quiz of Kings franchise with enhanced reward system.

UnityC#Live Service
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Run Boys

Run Boys

Hyper-CasualWebGL Games

Fast-paced hyper-casual runner game with simple, addictive gameplay.

UnityC#WebGL
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Rolling Ball

Rolling Ball

Hyper-CasualWebGL Games

Physics-based puzzle game with challenging levels.

UnityC#WebGL
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BUS STOP

BUS STOP

Hyper-CasualWebGL Games

Casual puzzle game with strategic bus management mechanics.

UnityC#WebGL
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Red Egg: The Rolling Ball Story

Red Egg: The Rolling Ball Story

Mobile Games

Adventure platformer with physics-based gameplay.

UnityC#Mobile
View Details

Languages

EnglishProfessional
TurkishBeginner
PersianNative

Education

Academic background and qualifications

Licentiate degree in Computer Games and Programming Skills

University of Applied Science and Technology

2020 - 2022

Get In Touch

Let's discuss your next project

Contact Information

Location

Izmir, Turkiye

Availability

Open to opportunities

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