Serbia Remote (Global)

UserWise Services is hiring a Senior Unity Engineer (Mobile Games)

About the Role

UserWise Services is looking for a Senior Unity Engineer to help build and scale our live-service mobile games. This role is ideal for engineers who enjoy working across gameplay systems, UI, and live-service features in a fast-moving development environment. You'll be a hands-on builder who collaborates closely with designers, artists, and product leaders to turn ideas into polished player experiences.

What You'll Do

  • Implement gameplay mechanics and systems using Unity and C# for mobile games
  • Translate design ideas and requirements into scalable, maintainable gameplay systems
  • Build modular systems that support rapid iteration and live-service content updates
  • Implement UI flows and gameplay feedback systems
  • Integrate art assets, animations, and gameplay content into the client
  • Support progression systems, rewards, events, and monetization features
  • Optimize performance, memory usage, and stability across mobile devices
  • Identify and resolve technical issues and gameplay bottlenecks
  • Collaborate closely with designers, artists, and producers to deliver features
  • Participate in code reviews and contribute to engineering best practices

What We're Looking For

  • 5+ years professional game development or Unity engineering experience
  • 3+ years developing games using Unity and C#
  • Experience shipping commercial mobile games
  • Experience working on free-to-play or live-service mobile games
  • Strong understanding of object-oriented programming and software architecture
  • Strong knowledge of Unity including scripting, animation systems, UI, and asset integration
  • Experience optimizing performance, memory usage, and build size for mobile devices
  • Proficient with version control systems such as Git
  • Strong written and spoken English communication skills

Nice to Have

  • Experience integrating backend services and APIs
  • Experience working with analytics and telemetry systems
  • Familiarity with modern software architecture and design patterns
  • Experience working with animation systems, physics systems, or particle effects
  • Experience collaborating in cross-disciplinary product teams
  • Experience supporting large-scale live operations and seasonal events
  • Experience improving development pipelines and engineering tooling
  • Experience working on games with large player bases
  • Experience using AI-assisted engineering tools
  • Strong interest in adopting AI-driven development workflows

Technical Stack

  • Unity
  • C#
  • Git

Team & Environment

You'll work in small, high-ownership teams where developers collaborate directly with design and product. This structure allows you to ship features quickly, iterate based on player feedback, and continuously improve our live games.

Benefits & Compensation

  • Contribute directly to live-service mobile games from development through launch and ongoing live operations
  • Work in a small, collaborative team where your work ships quickly and has real player impact
  • High ownership and visibility, with direct influence on how players experience our games
  • Paid Time Off and flexible scheduling
  • Annual performance reviews and opportunities for career growth

Work Mode

This is a 100% remote position with a globally distributed team. Candidates located in Europe are preferred, specifically in Serbia, Poland, Romania, Hungary, or Bulgaria.

Required Skills
UnityC#GitMobile Game DevelopmentObject-Oriented ProgrammingSoftware ArchitectureFree-to-Play GamesLive-Service GamesCommercial Game Shipping
Landing international contracts?

Invoice globally with an EU company

GloPay creates an Estonian partnership for you automatically. Your clients get proper invoices, you keep 95% of payments. Setup takes 5 minutes, works in 100+ currencies.

EU-registered company for compliance
Multi-currency invoicing & payments
Expense tracking & tax reports
Money in your bank in 1 business day
Start invoicing free
5% per invoice • No subscriptions
About company
UserWise Services

UserWise is built around strong talent, clear goals, and real accountability. We help top studios create and scale games that millions play every day. Building new titles, improving existing ones, and delivering results with speed and precision.

Visit website
Job Details
Category mobile
Posted 11 days ago