Principal Engineer (Mobile)

Location: San Francisco, CA, USA. Relocation support is not available.

Base salary: $179,500–$269,300 in Zone A, $202,800–$304,200 in Zone B, or $227,900–$341,900 in Zone C, gross annually, depending on primary work location.

Company

hirify.global is a game engine and technology company powering games, XR, web experiences, and 3D applications across industries.

What you will do

• Architect the iOS and Android mobile client for a greenfield consumer rewards application.
• Build gamified experiences including daily streaks, dynamic offer walls, progress trackers, and real-time wallet balances.
• Integrate the application with backend event pipelines and ML attribution models focused on user value and retention.
• Design reliable virtual currency ledgers, local state management, and offline/online synchronization.
• Implement secure event tracking to prevent device farming and exploitation loops.
• Mentor senior mobile engineers and define code quality, CI/CD, and frequent release standards.

Requirements

• 8+ years of experience building native Swift/Kotlin or high-performance React Native/Flutter consumer mobile applications at scale.
• Experience with high-DAU/MAU applications involving gamification, loyalty programs, or fintech and wallet features.
• Strong knowledge of MVVM, Clean Architecture, VIPER, memory management, and performance profiling.
• Experience with asynchronous data streams, real-time WebSocket connections, and offline-first local persistence.
• Strong focus on mobile UI/UX, micro-interactions, animations, and performance.
• Professional English proficiency is required for regular verbal and written communication.

Nice to have

• Experience at a consumer rewards company or a heavily gamified consumer fintech application.
• Familiarity with AppsFlyer, Adjust, Singular, and mobile attribution workflows.
• Passion for mobile gaming and knowledge of player retention drivers.

Culture & Benefits

• Health, life, and disability insurance, with offerings varying by country and employment status.
• Commute subsidy, retirement or pension plans, employee stock ownership, and incentive plans.
• Generous vacation and personal days, parental leave, and family-care programs.
• Mental health support, employee resource groups, and a global employee assistance program.
• Training and development programs, volunteering support, office snacks, and donation matching.