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Senior Unity 6 Developer / Team Needed for Open-World Mobile Game (iOS & Android) Project Overview We are building an ambitious third-person open-world mobile game for iOS and Android using Unity 6. The project is set in a modern Scandinavian-inspired city and focuses on immersive exploration, driving, character progression, dynamic missions, economy systems, and advanced AI interactions. We are looking for experienced Unity developers (individuals or teams) who have previously worked on large-scale 3D projects, multiplayer systems, open-world environments, vehicle mechanics, combat systems, and mobile optimization. Core Features The game includes: * Third-person character controller * Open-world city environment * Vehicle driving and ownership systems * Character progression * Mission framework * Dynamic NPC behaviors * Advanced AI systems * Economy and asset ownership * Inventory and equipment systems * Real-time events * Territory and faction systems * Backend-connected live-service functionality * Admin management dashboard * Future multiplayer expansion Technical Requirements Required experience: * Unity 6 * C# * Mobile optimization (iOS and Android) * Multiplayer architecture * AI systems * Vehicle systems * Character controllers * Backend integration * Database systems * Live-service game development Preferred experience: * Photon Fusion / Photon Quantum * PlayFab * Firebase * AWS * Dedicated server infrastructure * Open-world streaming systems * Procedural content systems Responsibilities The selected developer/team will help: * Design scalable architecture * Build gameplay systems * Develop vehicle mechanics * Create AI behaviors * Implement mission systems * Optimize performance for mobile devices * Develop backend-connected features * Integrate multiplayer-ready systems * Assist with long-term scaling strategy What We Are Looking For Please provide: 1. Relevant Unity projects 2. Open-world game experience 3. Multiplayer experience 4. Team size (if applicable) 5. Estimated hourly rate 6. Estimated availability 7. Examples of vehicle or combat systems you have built Important Certain gameplay systems and unique mechanics will be disclosed only during interviews and after further discussions. We are looking for long-term collaboration with highly skilled developers who can contribute to building a scalable and commercially viable game. Please begin your proposal with the word: “SCANDINAVIA” to confirm that you have read the entire job description.
Project ID: 40480910
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Active 4 days ago
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38 freelancers are bidding on average $7 USD/hour for this job

Hey there, I have carefully reviewed your project requirements. With over 10+ years of experience in game development, I have built and delivered high-quality games across multiple platforms, focusing on performance, scalability, and engaging player experiences. My expertise includes Unity, Unreal Engine, C#, C++, multiplayer systems, game mechanics, UI/UX for games, in-app purchases, and third-party SDK integrations—all highly relevant to building polished and production-ready games. I would love the opportunity to discuss your game idea in detail and collaborate on bringing it to life with a strong technical foundation and engaging gameplay. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. NOTE: Please consider the current budget as flexible — we can finalize it after discussing the complete scope and feature set. Thanks & Regards, Kajal
$15 USD in 40 days
7.5
7.5

SCANDINAVIA I am a freelance Unity3D developer with 7 years of experience. My portfolio exclusively showcases games developed in Unity, demonstrating my expertise and versatility in this engine. I have created a wide variety of games, each reflecting my commitment to quality and innovation. I invite you to explore my portfolio to see the caliber of my work. If you’re interested, I can also provide a compilation of any game from my portfolio for you to review. Feel free to reach out so we can discuss your project in detail. I’m excited to hear about your ideas and how we can bring them to life together. Best regards.
$20 USD in 40 days
7.2
7.2

Hello, SCANDINAVIA I have carefully reviewed your requirements and understand you need an experienced Unity 6 developer/team for a large-scale open-world mobile game featuring vehicle systems, character progression, AI-driven gameplay, economy mechanics, backend services, and future multiplayer expansion. With 9+ years of experience in Unity and mobile game development, I specialize in open-world architecture, vehicle mechanics, AI systems, multiplayer-ready frameworks, backend integration, optimization, and scalable live-service design. My team and I can build robust gameplay systems while ensuring smooth performance across iOS and Android devices. You will get: Quality optimized work 100% client satisfaction Fast delivery Suitable pricing Unlimited revisions Complete NDA & IP protection (project security is our top priority) Estimated delivery You will receive scalable gameplay architecture, vehicle and AI systems, mission frameworks, backend-connected features, optimized mobile performance, organized source code, and a strong foundation for future multiplayer growth. Come inbox & I will share relevant Unity open-world, vehicle, and multiplayer portfolio projects. Let’s get started. Best regards, Sohaib Pasn Games
$5 USD in 40 days
6.8
6.8

With extensive experience in Unity development, including past work on large-scale 3D projects and mobile optimization, I am well-equipped to handle the challenges of your ambitious open-world mobile game project. Could you share more details about the specific AI interactions and multiplayer features you envision for the game? Regards, Yogesh Kumar
$4 USD in 35 days
5.2
5.2

Hi there, This project instantly caught my eye, so I had to reach out. Building an open-world mobile game set in a Scandinavian-inspired city sounds like a dream come true. My expertise lies in Unity development, AI systems, and multiplayer architecture. I believe my experience aligns perfectly with your requirements. I'm confident I can bring a clean, professional, and seamless approach to your project. My commitment to quick communication and a fast turnaround ensures we can hit the ground running. Let me know if you are available for a quick chat! Regards, Aashiq
$4 USD in 7 days
4.7
4.7

SCANDINAVIA 1. Relevant Projects: * Multiplayer and real-time systems * AI-driven applications and automation platforms * Backend-integrated applications using cloud services and databases * Performance-focused mobile and desktop software 2. Open-World Experience: Experience designing modular architectures suitable for large environments, mission systems, inventory systems, economy mechanics, NPC interactions, and future content expansion. 3. Multiplayer Experience: Experience with client-server architectures, real-time synchronization, backend APIs, matchmaking concepts, and multiplayer-ready system design. 4. Team Size: Available as an individual developer with access to additional specialists when required. 5. Hourly Rate: $8/hour 6. Availability: 40–60+ hours per week. Available for long-term collaboration and immediate start. 7. Vehicle & Combat Systems: Experience developing gameplay mechanics involving player controllers, physics-based interactions, AI behaviors, progression systems, inventory logic, and backend-connected gameplay features. I would approach this project by first establishing a scalable Unity 6 architecture, ensuring mobile optimization, backend readiness, modular gameplay systems, and future multiplayer expansion from the beginning rather than retrofitting later. I am available to discuss the undisclosed mechanics under NDA and contribute to building a commercially viable long-term product.
$5 USD in 40 days
4.1
4.1

Hey — saw your post about developing an open-world mobile game with Unity 6. Open-world games often struggle with performance optimization on iOS and Android, especially when managing large environments smoothly. Are you aiming for a fully seamless open world or using load zones to handle streaming assets? I’ve led Unity projects focused on optimizing large mobile worlds without sacrificing quality or performance. Send over any design docs or specs and I’ll take a look to see how we can hit your goals efficiently.
$2 USD in 7 days
4.2
4.2

As a deeply committed and technically adept unity developer, I've been immersed in game development for over a decade and have managed successful projects at scale. My past work, which includes the development of diverse game genres on multiple platforms, demonstrates my capability to meet the complex demands of your open-world mobile game. My proficiency in C#, Unity 6, AI systems, multiplayer connectivity, and mobile optimization equips me well to build immersive worlds, create dynamic mission structures, develop advanced AI-driven interactions, and optimize performance for both iOS and Android devices. Lastly, given the breadth and depth of your vision for this game- from character progression to asset ownership & economy systems-I believe productive collaboration is essential. Understanding this,I manage always helping clients achieve their vision & solve unique problems that arise on more diverse projects. As we advance together towards building not just a commercially viable game but also a popular one I promise to mesh my proven skills with both methodology you require & perhaps most importantly imaginative innovation. Let's code the open world! PS: If as an additional benefit you are considering cost-effectiveness then I may posit that employing me/ my team would be exceptionally advantageous in that respect without compromising the quality! Please feel free to reach out if you'd like to discuss project further
$5 USD in 40 days
3.1
3.1

SCANDINAVIA. Hi, good day. I understand you are building a large-scale Unity 6 open-world mobile game with interconnected systems including vehicles, missions, progression, economy, AI behaviors, backend services, and future multiplayer support, where scalability and long-term architecture are critical from the start. I have experience with Unity-based gameplay architecture, backend-connected systems, AI frameworks, mobile optimization, and multiplayer-ready development patterns for complex live-service projects. For this project, I would focus on establishing a modular architecture for open-world streaming, character/vehicle systems, mission and economy frameworks, and backend integration layers that support future Photon/PlayFab multiplayer expansion without requiring major rewrites later. I would be glad to discuss your unique gameplay systems and long-term roadmap further.
$5 USD in 40 days
2.5
2.5

༺❖༻ SCANDINAVIA ༺❖༻ Dear Client, Thank you for posting this opportunity. Your project aligns perfectly with my experience in Unity 6, mobile optimization, open-world design, and backend-connected game development. I have developed large-scale 3D environments with character controllers, AI behaviors, vehicle systems, inventory management, and dynamic missions for iOS and Android. My experience includes multiplayer-ready architecture, live-service systems, and performance optimization for mobile devices. For your project, I will contribute to scalable game architecture, implement core gameplay mechanics, develop vehicle and AI systems, optimize performance, and integrate backend services. I can collaborate long-term, ensuring clean, maintainable code, and provide technical guidance for future multiplayer expansion. Relevant project samples, including open-world and vehicle/combat systems, are available upon request. I am confident in delivering a robust, production-ready mobile game with high performance and scalability. Best regards.
$8 USD in 40 days
2.6
2.6

Hi there. After reviewing your project, I can already see what success looks like here, and I have a clear approach to help move this forward efficiently. Your vision for an open-world mobile game with Unity 6 is truly exciting. One practical consideration I suggest is focusing on optimizing AI interactions to enhance player immersion further. This can be achieved through dynamic NPC behaviors and advanced AI systems. In line with your requirements, have you considered implementing a dynamic weather system within the game to introduce an extra layer of realism and challenge for players? This could significantly enhance the overall player experience and engagement. Looking forward to the opportunity to discuss this further and explore how we can bring this project to life seamlessly. Regards, Riyaaz
$5 USD in 7 days
2.4
2.4

SCANDINAVIA, I hope you’re doing well. I’m an experienced Unity developer focused on delivering robust, mobile-optimized open-world experiences. I specialize in building scalable architectures for large-scale 3D projects, integrating vehicle systems, AI-driven NPCs, and live-service backends, all tuned for iOS and Android performance. I’ll approach your Scandinavian-inspired city with a modular design: streaming world data, streamlined AI routines, and a multiplayer-ready framework that scales as you expand to future PvE/PvP content. In past work I’ve delivered open-world setups with dynamic missions, asset ownership and economy loops, and responsive combat and vehicle mechanics using Unity, C#, and backend services. I’ve architected modular gameplay systems, implemented backend integrations, and tuned mobile performance to maintain smooth frame rates while supporting complex interactions. I can handle the work based on my expertise, delivering a clean, tested implementation with clear milestones and a focus on mobile optimization, live-service readiness, and long-term scalability. I’m ready to discuss timelines and risk mitigation to ensure a successful, commercially viable game. Please feel free to contact me so we can discuss more details. I am looking forward to the chance of working together. Best regards, Billy Bryan
$20 USD in 19 days
2.0
2.0

SCANDINAVIA Hello, I have carefully reviewed your project requirements for the open-world mobile game and can contribute to building a scalable, high-performance solution using Unity 6. My development approach includes: Architecture & Planning – Design a modular and scalable game architecture using clean C# patterns, ensuring future multiplayer and live-service expansion can be integrated without major refactoring. Open-World Development – Build a streaming-based city environment with optimized asset loading, LOD systems, occlusion culling, and memory management for smooth performance on iOS and Android devices. Core Gameplay Systems – Implement third-person character controls, inventory, progression, equipment, economy, asset ownership, and mission frameworks with extensible data-driven systems. Vehicle & Combat Systems – Develop realistic vehicle mechanics, ownership features, and combat systems with responsive controls and mobile-friendly optimization. AI & NPC Behaviors – Create advanced NPC routines, pathfinding, faction interactions, dynamic events, and mission-related behaviors to improve immersion. Backend & Live Services – Integrate PlayFab, Firebase, or AWS services for player data, economy management, analytics, cloud saves, and live events. Multiplayer Readiness – Structure systems with Photon Fusion/Quantum compatibility to support future multiplayer expansion and dedicated server deployment.
$15 USD in 60 days
2.4
2.4

SCANDINAVIA Hello, I'm a Senior Software Engineer with experience in Unity, C#, backend systems, databases, AI integrations, and scalable application architecture. I've worked on complex real-time systems, multiplayer-ready architectures, and performance-critical applications for web, mobile, and gaming environments. I can contribute to gameplay systems, AI behaviors, backend integration, live-service infrastructure, admin dashboards, data synchronization, and long-term scalability planning. My focus is on building maintainable, mobile-optimized systems that can support future multiplayer expansion. Available for long-term collaboration and happy to discuss the project in detail under NDA. Looking forward to learning more about your vision. Best regards, Mykola
$5 USD in 40 days
0.9
0.9

I understand you need a Senior Unity 6 Developer to build an ambitious third-person open-world mobile game for iOS and Android, focusing on immersive exploration, driving, character progression, and advanced AI. I successfully shipped a large-scale 3D open-world title for mobile, featuring complex vehicle physics and AI-driven NPCs, which achieved over 1 million downloads. My approach will involve leveraging Unity 6's latest features, specifically its URP for optimized rendering and DOTS for efficient AI and simulation. I will develop core systems including a modular mission framework, a fluid driving controller using the new Input System, and a robust character progression system with skill trees and inventory management. The open-world environment will be constructed using ProBuilder for rapid prototyping and optimized with occlusion culling. What are the primary target devices for performance optimization, considering Unity 6's new capabilities? Ready to start as soon as you confirm scope.
$25 USD in 7 days
0.0
0.0

❌✋❌STOP❌✋❌ SCANDINAVIA This is not just a Unity build project—the real challenge is controlling complexity early. Open-world systems, live-service architecture, AI, vehicles, and future multiplayer create technical debt quickly if core systems are not isolated and performance budgets are not enforced from the start. I would approach this through modular architecture first: gameplay systems separated from networking concerns, backend abstraction layers for future multiplayer expansion, and streaming-aware world design optimized for mobile memory constraints. Core implementation priorities would be world streaming, entity/state management, and rollback-safe gameplay systems that remain multiplayer-ready without forcing networking into every subsystem immediately. Vehicle mechanics, mission systems, and AI behaviors should be built around reusable state-driven frameworks rather than isolated features. Risk reduction here means establishing performance validation early, enforcing mobile profiling checkpoints, protecting backend scalability, and ensuring systems remain maintainable as content grows. Acceptance criteria should include memory budgets, FPS targets, sync validation, and regression testing for gameplay loops. I can begin immediately with architecture review and system breakdown work. The final setup should remain scalable, multiplayer-ready, and maintainable for long-term expansion.
$5 USD in 12 days
0.0
0.0

❇❇❇SCANDINAVIA❇❇❇ I can do this Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect Let's connect
$5 USD in 40 days
0.0
0.0

Hi there, My experience aligns perfectly with your project needs. Proficient in Unity 6, C#, and mobile optimization, I excel in developing multiplayer architecture, AI systems, and vehicle mechanics. I would approach this project by designing scalable architecture, building immersive gameplay systems, and optimizing performance for seamless mobile gaming experience. I recommend integrating backend-connected features and ensuring multiplayer readiness. I would love to chat more about your project with you! :) Kind Regards, Tristan
$5 USD in 40 days
0.0
0.0

I am a 3D artist and technical developer with strong experience in real-time game production and interactive environments. I specialize in creating high-quality 3D assets, stylized and realistic character design, and environment building using tools like Blender, ZBrush, Substance Painter, and Unreal Engine 5. While my core background is currently in Unreal Engine (Blueprints, environment design, and gameplay prototyping), I also have a strong understanding of game architecture, systems design, and optimization workflows that directly transfer to Unity-based development—especially for large-scale open-world projects. Relevant Skills & Experience : 3D Character Design (ZBrush / Blender) Environment Design for real-time engines (Unreal Engine 5) Game asset production and optimization (mobile & PC workflow understanding) Experience with gameplay prototyping using Blueprints Motion graphics and interactive visual systems Strong understanding of game systems (progression, AI behavior logic, mission structure)
$5 USD in 40 days
0.0
0.0

"SCANDINAVIA" This project perfectly matches my expertise and your vision for a seamless, polished user experience that integrates social networking with real-time audio streaming. I bring extensive industry experience building scalable, high-performance platforms designed for smooth interaction and reliable operation. Though new to Freelancer, my proven track record spans similar sophisticated projects off-platform—please review my portfolio for examples. I’m confident in delivering a solution that exceeds your expectations and would welcome a free consultation to discuss your goals in detail. Looking forward to collaborating and bringing your vision to life!
$4 USD in 14 days
0.0
0.0

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