Senior/Lead Unity Engineer Needed for Viral Physics Mobile Game DevelopmentFreelanceJobs • Canada
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Senior/Lead Unity Engineer Needed for Viral Physics Mobile Game Development
FreelanceJobs
- Canada
- Canada
About
Premium Contract Serious Applicants Only
We are seeking a top-tier Unity engineer (senior/lead level) to architect and build the core systems for a physics-driven casual mobile game with significant commercial potential.
This posting is intentionally targeted at the top 1% of mobile game developers on Upwork.
If you have not shipped polished titles at scale, this role is likely not a fit.
PROJECT OVERVIEW
We are developing a high-tension physics game centered on a deceptively simple mechanic:
A water balloon is filled drop-by-drop
Player chooses when to release it from increasing heights
Real-time physics determines survival vs burst
The experience relies on precise simulation, tactile feedback, and exceptional "game feel." Execution quality will determine success.
Initial launch scope: single-player with progression
Future scope: social modes, live ops, potential franchise expansion
ROLE — TECHNICAL OWNER
You will function as Lead Gameplay Engineer / Technical Architect, responsible for:
• Designing core simulation systems
• Establishing scalable code architecture
• Implementing performance-critical gameplay
• Defining technical standards for production
• Preparing the project for live deployment
You will collaborate with design, art, and production stakeholders.
REQUIRED EXPERTISE (NON-NEGOTIABLE)
Unity Mastery
• 7+ years professional Unity experience
• Expert C# and performance-oriented coding
• Deep knowledge of Unity internals
• Experience shipping high-quality mobile titles
Advanced Physics & Simulation
Demonstrated experience beyond default rigid body systems, including:
• Deformable / soft-body techniques
• Custom physics behaviors
• Elastic or membrane simulation
• Mass distribution & momentum modeling
• Collision tuning for believable outcomes
You must be capable of building a convincing water-filled balloon system that feels physically plausible without requiring full fluid simulation.
Mobile Optimization at Scale
• Profiling CPU/GPU/memory usage
• Maintaining performance on mid-tier devices
• Battery and thermal considerations
• Asset management strategies
• Stable 60 FPS targets
Production Architecture
• Clean, modular, maintainable codebases
• Scalable systems design
• Build pipelines
• Version control best practices
• Technical documentation
Mobile Systems Integration
Hands-on experience with:
• In-app purchases
• Ads SDKs
• Analytics platforms
• Crash reporting
• App Store / Google Play submission requirements
STRONGLY PREFERRED
• Experience with physics-heavy or tactile gameplay titles
• Experience with highly polished casual games
• Prior role as lead or principal engineer
• Familiarity with Cinemachine, URP, Addressables
• Experience integrating FMOD or Wwise
• Live-service or post-launch support experience
EXPECTED DELIVERABLES
• Production-ready core gameplay systems
• Optimized builds for iOS & Android
• Clean, documented, maintainable code
• Technical roadmap for future features
• Integration support for assets and audio
• Deployment guidance
ENGAGEMENT
• Contract with potential long-term collaboration
• Milestone-based (flexible)
• Remote, async-friendly
• Estimated timeline: 3-4 months to production release
IDEAL CANDIDATE PROFILE
You are likely:
• A senior or principal-level engineer
• Comfortable owning critical gameplay systems
• Focused on polish and player experience
• Able to make pragmatic technical tradeoffs
• Professional, communicative, and dependable
APPLICATION REQUIREMENTS
To be considered, please include:
1. Links to shipped mobile games (App Store / Google Play)
2. Description of your role on those projects
3. Portfolio or examples of physics-driven work
4. Brief technical approach to simulating a water-filled balloon on mobile
5. Your availability and preferred rate
6. Confirmation you can deliver for BOTH iOS and Android
Applications without verifiable shipped titles will not be prioritized.
CONFIDENTIALITY
Shortlisted candidates will sign an NDA before receiving full design documentation.
WHY THIS PROJECT
• Clean, elegant core mechanic with mass appeal
• Significant upside potential
• Opportunity to shape a product from the ground up
• Long-term collaboration possible on future titles
If you are a world-class Unity engineer who enjoys building polished, physics-driven gameplay experiences — we want to work with you.
Contract duration of 3 to 6 months.
Mandatory skills: Game Development, Unity, C#, Android
Languages
- English
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