You will get integration playfab, firebase or custom backend in unity
Project details
Need a stable backend for your Unity game?
I implement and fix backend integrations including PlayFab, Firebase, Node.js servers, and REST APIs.
I handle:
Authentication systems
Leaderboards and player data
Cloud functions and server logic
Multiplayer state handling
API integration (FastAPI / .NET / Node.js)
Deployment to AWS or Azure
Most Unity developers only build gameplay. I build the full client-server architecture.
If your backend is unstable, slow, or poorly structured, I can redesign and stabilize it properly.
Message me before ordering.
I implement and fix backend integrations including PlayFab, Firebase, Node.js servers, and REST APIs.
I handle:
Authentication systems
Leaderboards and player data
Cloud functions and server logic
Multiplayer state handling
API integration (FastAPI / .NET / Node.js)
Deployment to AWS or Azure
Most Unity developers only build gameplay. I build the full client-server architecture.
If your backend is unstable, slow, or poorly structured, I can redesign and stabilize it properly.
Message me before ordering.
Game Engine
UnityPlatform Type
PC, Mobile Device, VRGenre
Action, Adventure, Arcade, Shooter, Fighting, Racing, Puzzle, Role Playing, Educational, Simulation, Platformers, Strategy, Sports, Idle, Music, Card, MultiplayerPlugins
Ads/Monetization, Animation, Billing/In-App Purchasing, Analytics, Social, Utilities, Chat, Localization, Security, AR, Marketing, Anti-Cheat, Machine Learning, LocationWhat's included
| Service Tiers |
Starter
$85
|
Standard
$200
|
Advanced
$400
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 7 days |
Number of Revisions | 1 | 1 | 1 |
Number of Plugins | 1 | 2 | 3 |
Pricing Tier Options | Upload to App Store | Upload to App Store | Upload to App Store |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$170 - $800
Additional Revision
+$100
27 reviews
(27)
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SH
Sung H.
Oct 2, 2024
Unity Consultant Needed for a mobile game
Seyed has been excellent in all of our past work together. He's always been professional, knowledgeable and a strong member of our game development team. I highly recommend him to any project.
AK
Alpay K.
Aug 18, 2023
Customized Game Development Services
Hossein is a committed and professional game developer in his work, and he delivered the project to us on the promised time.
Hossein, Thank you.
Hossein, Thank you.
IN
Iggy N.
Mar 7, 2023
Full Stack developer
Hossy is a great dev, I have worked with him before and will definitely work with him again.
VR
Vidya R.
Mar 6, 2023
Java library integration for Chromebook game
Seyed was great to work with. He was prompt in communication and very responsive. We were having a few issues with building our game in Unity for Android and Seyed was very proactive in trying multiple ways to fix our issue. I would love to work with Seyed again.
IN
Iggy N.
Jan 5, 2023
Various Unity tasks
Hossy is a great dev, responsive and hardworking, will definitely work with him again!
About SEYEDHOSSEIN
Unity Multiplayer, Backend & Web3 Developer | Node.js, FastAPI, .NET
Istanbul, Turkey - 5:54 am local time
I help studios and startups build complete multiplayer game systems—from Unity gameplay to backend APIs, matchmaking, authentication, databases, cloud deployment, LiveOps, and Web3 integration.
With 12+ years of software engineering experience and 6+ years specializing in Unity, I develop production-ready game infrastructure instead of quick prototypes.
My expertise includes:
• Unity Multiplayer Development
• Node.js Game Servers
• FastAPI & .NET REST APIs
• PostgreSQL, SQL Server, MySQL & SQLite
• Matchmaking & Real-time Networking
• Authentication & Backend Integration
• Blockchain & Web3 Integration
• Smart Contract Integration
• MetaMask, Coinbase Wallet & Thirdweb
• AWS & Azure Cloud Deployment
• LiveOps Systems
• Backend Performance Optimization
• VR Applications (HTC Vive)
I have successfully delivered more than 20 commercial games and software projects, including multiplayer mobile games, backend systems, VR applications, cloud-connected production environments, and Web3 integrations.
I can help you with:
• Building multiplayer games from scratch
• Custom backend development
• Backend integration with Unity
• Blockchain & Web3 integration
• Wallet authentication & NFT systems
• Multiplayer architecture
• Server deployment
• Database design
• Performance optimization
• Fixing unstable multiplayer projects
• LiveOps infrastructure
If your project requires Unity, backend engineering, or Web3 integration, I can deliver the complete technical solution—from prototype to production.
Steps for completing your project
After purchasing the project, send requirements so SEYEDHOSSEIN can start the project.
Delivery time starts when SEYEDHOSSEIN receives requirements from you.
SEYEDHOSSEIN works on your project following the steps below.
Revisions may occur after the delivery date.
Continuous integration
I will be in touch on each phase of the project and send you revisions until you confirm the behaviour of the needed plugin. aftert getting confirmation, I will continue to the next steps.