Unity Game Back-End & System Developer

@pasngames

Hello, I have carefully reviewed your requirements and understand you need an experienced Unity & Firebase developer to build secure, scalable backend systems, including authentication, cloud saves, player progression, wallet management, Cloud Functions, real-time synchronization, and a multiplayer-ready architecture. With 9+ years of experience and 200+ games successfully developed, I will deliver a clean, secure, and optimized backend with Firebase best practices, anti-cheat protection, scalable database architecture, and well-documented code for future expansion. You will get: 1. Quality optimized work 2. 100% client satisfaction 3. Fast delivery 4. Suitable pricing 5. Unlimited revisions 6. Complete NDA & IP protection (project security is my top priority) Estimated delivery A detailed milestone-based timeline will be provided after reviewing the complete backend architecture and project requirements. Come inbox & let’s get started. Best regards, Sohaib Pasn Games

@pinkeegupta

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native, and for web and backend on react js and node js, Python Django and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)

@kishanbwts

I’ve worked on several Unity games with Firebase backends, building secure user authentication, cloud saves, and real-time data sync across devices. In one project for a mobile RPG, I created scalable Firestore structures and Cloud Functions to handle player progression and in-game currency securely, including transaction logs to prevent cheating. How do you plan to handle multi-device synchronization conflicts and offline scenarios? Implementing efficient Firebase security rules upfront can help avoid data tampering while keeping reads and writes optimized. I can design the entire backend architecture, focusing on wallet security, real-time updates, and smooth reward distribution that prevents client-side manipulation. I’m ready to start with an initial discussion and quickly move to a prototype based on your needs.

@tyagigravity

Being in the realm of Unity Game and Mobile Application Development for over 9 years, I bring to the table an all-encompassing skill set specifically tailored to your project requirements. With proficiency in C#, Firebase Authentication, Firestore Database, Firebase Cloud Functions, and Firebase Security Rules amongst others, I have built highly scalable and secure backend systems before. One such backend system is a cloud-based inventory management system using Firebase, ensuring undeterred data integrity. Everything was just a click away thus improvising efficiency and productivity. Additionally, my ability to optimize database reads/writes and enhance overall backend performance with an understanding of secure wallet and transaction-based systems is something that I believe will prove beneficial for your project. My experience in developing multiplayer games using networking solutions like Photon adds more value as it aligns with your requirement of future multiplayer-ready architectures. To wrap up, my optimized mobile game development capabilities perfectly fuse well with operationalizing your visionary game project from secure user authentication to designing a secure wallet and currency management system…and beyond! Let me help exceed your project's refinement requirements by leveraging my rich professional experience combined with my passion for craftmanship. I look forward to having the opportunity to share further details about my work with you.

@FreeLancers360

As a Full Stack Developer with a wealth of experience in various domains including game development, I strongly believe that I am the right fit for your Unity Game Backend & Systems project. My extensive work with Unity and C#, coupled with my deep familiarity in Firebase, particularly in Firestore Database, Firebase Cloud Functions, and Security Rules have equipped me to successfully deliver the required responsibilities. My broad range of skills also covers areas such as REST APIs, Git version control, mobile game development and much more. Additionally, I am highly familiar with ensuring data integrity and protection against client-side manipulation - therefore providing solid foundations to underpin your game. My past experiences align closely with the skills and requirements you seek from this project: shipping successful production applications or games, building backend systems with Firebase (among others), solid understanding of cloud synchronization across devices etc.I am excited by the opportunity to collaborate on pushing the boundaries of gaming technology - integrating push notifications if needed and strategizing future multiplayer-ready architecture. My ingenuity will show through as we build an efficient gaming system together.I look forward to expanding on my experience during an initial discussion with you. Rest assured that detailed project information will be treated discreetly with utmost confidentiality pursuant to any NDA if required.

@jagratip3

Hello, I can support you as a backend/systems developer for your Unity-based game, with strong experience in building scalable, secure cloud systems using Firebase and C#-driven game architectures. I’ve worked on similar production systems involving authentication flows, cloud save structures, in-game economies, and real-time data sync across devices. My focus is always on data integrity, secure transaction handling, and preventing client-side manipulation—especially important for wallet/currency systems. What I can build for you: • Secure Firebase Authentication (email, device, or custom tokens) • Cloud Save system with versioning and conflict resolution • Player profile + progression architecture • Secure in-game wallet/currency system with transaction logging • Firestore schema design optimized for cost + performance • Cloud Functions for backend logic, rewards, and validations • Anti-tamper rules using Firebase Security Rules • Push notification integration if required • Scalable structure ready for multiplayer expansion Technical strengths: • Unity + C# gameplay/backend integration • Firestore + Realtime Database (where appropriate) • Cloud Functions (server-authoritative logic) • REST API integration where needed • Git-based collaborative workflows Happy to share relevant production experience and system designs during the next stage.

@nathanholmes

What stands out is the focus on long-term scalability rather than simply getting a backend running. Systems such as cloud saves, wallets, progression tracking, rewards, and future multiplayer support all depend on a strong architecture from the beginning, especially when security and data integrity are critical requirements. I’d approach the project by designing the Firebase architecture first, ensuring authentication, player data, transactions, cloud synchronization, and security rules are structured to scale as new features are introduced. Sensitive actions such as currency updates, reward claims, and progression changes should be validated through backend logic rather than trusted on the client side, helping reduce the risk of manipulation and data inconsistencies. I have experience working on Unity-based applications, backend integrations, user management systems, cloud-hosted workflows, and scalable platform architecture. The combination of Firebase, secure progression systems, and future multiplayer readiness makes this an interesting project, and I’d be happy to discuss architecture considerations, development phases, and implementation strategy in more detail.

@uchebuzz9844

Hi, Backend work for Unity games with Firebase is what I do most weeks, so this brief fits well. On a card-based mobile game last year, I built the full Firebase backend in C# and Node.js. Auth used Firebase Auth with anonymous-to-permanent linking, so guest players never lost progress. Cloud save and progression sat in Firestore, with a document layout that kept reads under one per session load. The wallet was the part I took most seriously. All currency changes ran through Cloud Functions inside Firestore transactions, never from the client. Each delta wrote an immutable ledger entry, giving a full transaction history and clean reconciliation. Security Rules made balance fields read-only for clients, which closed the obvious tamper paths. Rewards, daily claims, and cross-device sync followed the same server-authoritative pattern. I also wired FCM for push, set up GitHub Actions for staged deploys, and structured the Functions code so multiplayer logic could slot in later via Photon or a Cloud Run service. Available 30 to 40 hours a week. Happy to start fixed-price at your 50,000 INR budget for a defined first milestone, then move to hourly once scope is clear under NDA. Uche

@BronJH

I love working with clients to transform ideas into clean, professional results. Your need for a Unity Game Back-End & System Developer aligns perfectly with my expertise in creating secure, user-friendly, and seamless backend systems. I bring hands-on experience from successfully completed projects outside the platform. My skills include Unity/C#, Firebase Authentication, Firestore Database, Cloud Functions, and more. Let’s connect about your project! I offer honest advice and a free consultation to help you find the best direction for your goals. Let’s bring your ideas to life!! Regards, Bronwen

@AcuteTech06

Hello, I can develop a robust and scalable backend system for your Unity game, including player data management, inventory/economy systems, and secure data handling. I will ensure clean C# architecture and smooth integration with Unity for reliable performance and future expansion. I have strong experience in Unity game systems and backend integration using APIs/Firebase/custom logic. Let’s connect to discuss your exact requirements. Regards, acute tech solutions

@nikolar13

Hi, I build Unity + Firebase backends for mobile games — authentication, Firestore architecture, Cloud Functions, Security Rules, secure wallet and currency systems, and real-time data sync across devices. I've shipped production games with transaction logging, reward distribution, and client-side manipulation prevention baked in. Node.js Cloud Functions are my preferred backend layer and I'm comfortable designing with multiplayer-ready architecture from day one. Happy to sign an NDA before reviewing specs. Given the wallet and progression scope, I'd suggest phasing this into milestones — could you confirm whether the ₹50,000 budget covers the full build or Phase 1 only?

@InPowers

Hi! This is exactly what I do — Unity gameplay/systems AND the backend behind them, so one person covers both. I've shipped commercial Unity games on Steam (Time Lock VR 1 & 2, Deployment) and built production backends (Node.js/Fastify + PostgreSQL, ASP.NET Core), including a payment platform with a double-entry ledger. For your project I'd map the game systems and data model first, then wire the back-end (auth, persistence, server logic) to the Unity client through a clean API. Could you tell me which systems are in scope — economy, save, matchmaking, leaderboards? Happy to start with one well-defined module so you can see how I work. — Vadym

@MartinusDanteB18

We recently wrapped up a project very similar to this, focusing on building backend systems for a Unity game. We've helped clients achieve their goals by creating seamless and professional backend solutions for their projects. We will help you achieve a robust and efficient backend infrastructure for your Unity game project, integrating Firebase for secure user authentication, cloud save functionality, and real-time data synchronization. Your emphasis on a "secure wallet/currency management system" aligns with our expertise in implementing transaction logging, secure reward distribution, and data protection. We have 75+ 5-star reviews on similar projects and rank in the top 1% among 75 million users! I'd be happy to discuss your project in more detail and share how we can bring it to life efficiently and professionally. Best case, we work together. Worst case, you get free advice that helps you move forward. Regards, Martinus.

@bjornvdl

The detail that caught my attention was the need for a Unity Game Backend & Systems Developer, as backend systems are crucial for game success. While I am new to Freelancer, I have tons of experience in developing secure backend solutions and have completed many successful projects off-platform. I specialize in Unity, Firebase, and cloud-based systems. By ensuring secure user authentication, designing efficient cloud save functions, and implementing real-time data synchronization, I guarantee reliable systems that protect against manipulation. With a strong focus on scalability and performance optimization, I will deliver a robust backend tailored to your game's needs. I would love to chat more about your project! Regards, Bjorn van der Linden

@P0stmanPat

I can design and implement the full backend and core systems for your Unity game using Firebase, with a strong focus on security, scalability, and clean multiplayer-ready architecture. I’ve built production mobile games with secure authentication, wallets, progression, and cross-device cloud saves. My experience includes Firebase Auth, Firestore, Cloud Functions, Security Rules, and Storage, plus Node.js where needed for more complex logic, anti-cheat measures, and real-time synchronization. I also work with Git-based workflows and detailed technical documentation. I’d start by defining the data models, security rules, and transaction flows, then implement core services: auth, profiles, progression, wallets, rewards, logging, and push notifications if required. From there, I’d refine performance and prepare the architecture for future multiplayer. Quick question before I suggest a detailed approach: Do you already have an initial data schema or backend diagram, or should I propose one from scratch?

@Anika1802

Hey! With over 6 years of industry experience, I specialize in transforming ideas into high-performance, reliable and scalable digital products. By adopting a clean architecture, modern design and efficient execution approach, I can deliver a backend system for your Unity game that is not only secure and robust but also scalable for future multiplayer requirements. My extensive experience with Firebase platform, including Firestore Database, Cloud Functions and Security Rules gives me an edge in implementing cloud save functionality, secure user authentication/account management and creating scalable Firebase database architecture. Moreover, I have the proficiency and understanding of backend security and anti-cheat implementation which would be crucial for ensuring the integrity of your game system. Lastly, my experience shipping production applications/games shows that I am skilled not only in coding but also in delivery and post-deployment support. All these factors combined make me well-suited for this project. I look forward to discussing the project details further with you to provide a better picture of my abilities!

@davonchristians

Just recently helped a client achieve success on their amazing platform that we built and launched, exactly the kind of result you're looking to achieve. We can help you do the same, delivering a clean, fully functional web solution tailored to your business. I noticed what you're after and it lines up well with the work we do. Whether it's something that needs to feel professional, run seamlessly, or integrate cleanly with your existing setup, that's exactly the standard we hold ourselves to on every build. We specialize in full-stack development, covering everything from custom front-end builds to backend APIs, eCommerce stores, and business platforms. We have 75+ 5-star reviews on similar projects and rank in the top 1% among 75 million users! I'd love to discuss further about the project, at the worst case you're still walking away with a free consultation. ??We look forward to working with you! Best Regards, Davon Smith

@karthikresonite

Hello, Resonite Technologies has 15+ years of experience building secure, scalable backend systems for games, mobile applications, and cloud platforms. We have expertise in Unity, Firebase, and cloud-native architectures, making us a strong fit for your ongoing game project. Our team can implement: • Secure Firebase Authentication and account management • Cloud save with cross-device synchronization • Player profiles, progression, and inventory systems • Secure wallet/currency management with transaction logging • Firestore database architecture optimized for performance and scalability • Firebase Cloud Functions with robust backend validation • Reward distribution and claim systems • Firebase Security Rules to prevent client-side manipulation • Push notifications and analytics integration • Multiplayer-ready backend architecture using Photon, Fusion, Mirror, or PlayFab We follow best practices for anti-cheat, data integrity, secure APIs, Git workflows, and comprehensive documentation. Our modular architecture ensures your backend remains scalable as new gameplay features are introduced. We're comfortable working under NDA and collaborating long-term throughout development. We'd be happy to discuss your architecture and share relevant backend and game development experience. Best Regards, Resonite Technologies

@prachia77

Hi, I have carefully reviewed your requirements and understand that you need a secure, scalable backend for your Unity game with Firebase integration and future multiplayer readiness. I can develop a robust backend featuring user authentication, cloud saves, player profiles, wallet and currency management, transaction history, reward systems, real-time synchronization, and secure Firebase Cloud Functions with optimized Firestore architecture. The solution will prioritize security through Firebase Security Rules, server-side validation, anti-cheat measures, and efficient database design to prevent client-side manipulation while maintaining high performance. The architecture will also be designed for future expansion with multiplayer support using PlayFab, Photon, or similar networking solutions. You'll receive clean, well-documented code, deployment support, technical documentation, and a maintainable backend that scales as your game grows. I'm comfortable working under an NDA and collaborating closely throughout development. I look forward to discussing your project and contributing to its long-term success. Best regards, Prachi