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Senior Software Engineer with 12+ years of experience, specializing in Unity architecture, multiplayer systems, and cloud-integrated game backends. I design scalable client-server architectures, real-time multiplayer infrastructure, and production-ready mobile game systems with a strong focus on performance and stability. I also build and integrate REST APIs and backend services (Node.js, FastAPI, .NET), integrate production platforms like PlayFab, and deploy LiveOps-ready infrastructure on AWS and Azure. I focus on maintainability, low-latency networking, and reducing production issues rather than prototype-only results.…Senior Software Engineer with 12+ years of experience, specializing in Unity architecture, multiplayer systems, and cloud-integrated game backends. I design scalable client-server architectures, real-time multiplayer infrastructure, and production-ready mobile game systems with a strong focus on performance and stability. I also build and integrate REST APIs and backend services (Node.js, FastAPI, .NET), integrate production platforms like PlayFab, and deploy LiveOps-ready infrastructure on AWS and Azure. I focus on maintainability, low-latency networking, and reducing production issues rather than prototype-only results.

SeyedHossein Rouholamini

Game Developer, Full Stack Developer, Back-End Developer, +5

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Senior Software Engineer with 12+ years of experience, specializing in Unity architecture, multiplayer systems, and cloud-integrated game backends. I design scalable client-server architectures, real-time multiplayer infrastructure, and production-ready mobile game systems with a strong focus on performance and stability. I also build and integrate REST APIs and backend services (Node.js, FastAPI, .NET), integrate production platforms like PlayFab, and deploy LiveOps-ready infrastructure on AWS and Azure. I focus on maintainability, low-latency networking, and reducing production issues rather than prototype-only results.…Senior Software Engineer with 12+ years of experience, specializing in Unity architecture, multiplayer systems, and cloud-integrated game backends. I design scalable client-server architectures, real-time multiplayer infrastructure, and production-ready mobile game systems with a strong focus on performance and stability. I also build and integrate REST APIs and backend services (Node.js, FastAPI, .NET), integrate production platforms like PlayFab, and deploy LiveOps-ready infrastructure on AWS and Azure. I focus on maintainability, low-latency networking, and reducing production issues rather than prototype-only results.

Available to hire

Senior Software Engineer with 12+ years of experience, specializing in Unity architecture, multiplayer systems, and cloud-integrated game backends. I design scalable client-server architectures, real-time multiplayer infrastructure, and production-ready mobile game systems with a strong focus on performance and stability.

I also build and integrate REST APIs and backend services (Node.js, FastAPI, .NET), integrate production platforms like PlayFab, and deploy LiveOps-ready infrastructure on AWS and Azure. I focus on maintainability, low-latency networking, and reducing production issues rather than prototype-only results.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Turkish

Fluent

Persian

Fluent

Work Experience

Senior Unity Multiplayer Engineer at Independent Game Project — Dark Shooter

January 1, 2025 - Present

Designed and developed a production-ready real-time multiplayer mobile game with complete client-server architecture and backend infrastructure. Architected Unity client systems optimized for performance across low-end and mid-range Android devices. Implemented authoritative multiplayer game server using Node.js. Built backend REST API services using FastAPI for player data, matchmaking, and session management. Engineered low-latency real-time networking systems for responsive multiplayer gameplay. Optimized CPU, memory, and rendering performance to ensure broad device compatibility. Designed scalable backend architecture suitable for LiveOps and future expansion. Managed server deployment, monitoring, and production stability.

Freelancer at Upwork

February 1, 2016 - Present

Designed and deployed multiplayer server architecture for mobile real-time games. Built scalable REST APIs using FastAPI and .NET for Unity integration. Integrated and customized PlayFab backend systems for production titles. Implemented cloud-based LiveOps features using AWS and Azure. Diagnosed and stabilized failing Unity multiplayer systems. Delivered 20+ production applications including multiplayer mobile games and VR systems. Key impact included reducing multiplayer desync incidents by 70% via server-authoritative redesign, improving mobile FPS stability from ~25 to consistent 55–60 FPS, and migrating unstable backend systems to scalable cloud infrastructure.

Freelance Software Engineer - Unity Multiplayer Backend at Upwork (Freelancer)

February 1, 2016 - Present

Designed and deployed multiplayer server architecture for mobile real-time games; Built scalable REST APIs using FastAPI and .NET for Unity integration; Integrated and customized PlayFab backend systems for production titles; Implemented cloud-based LiveOps features using AWS and Azure; Diagnosed and stabilized failing Unity multiplayer systems; Delivered 20+ production applications including multiplayer mobile games and VR systems; Key impacts include reduced desync incidents by 70%, improved mobile FPS stability, and migration to scalable cloud infrastructure.