Senior Unity Developer

X-FLOW is a mobile game development company seeking a Senior Unity Developer for Happy Color, a massively popular digital coloring app with tens of millions of monthly active users. The role involves developing and improving client-side features for a UI-heavy, live product with significant technical load and architectural influence opportunities.

• Develop and improve client-side features
• Collaborate with Backend, Design, QA, Analytics, and Marketing teams
• Integrate and update third-party SDKs (ads, analytics, social)
• Investigate and resolve crashes, ANRs, and performance issues
• Maintain build stability, asset cleanliness, and UI quality
• Participate in designing and improving the client's technical architecture

• 5+ years of commercial development experience
• 2+ years of mobile Unity development in production
• Experience working on live products with large user bases
• Strong experience with UI-heavy client-server applications
• Experience integrating ad and analytics SDKs
• Async data/content loading and CDN workflow expertise
• Optimization skills for low-end devices
• Strong task decomposition and deadline management
• Ability to work with legacy code and follow architectural principles
• Nice to Have: Mobile development experience, backend understanding, UI architectural patterns (MVC/MVP/MVVM), UniTask/UniRx/DOTween, shader knowledge

• Competitive salary and benefits package
• Flexible working hours and remote/office work options
• Career growth and professional development opportunities
• Fun and inclusive company culture celebrating diversity and creativity
• Opportunity to work with talented team in dynamic creative environment