Senior Software Engineer (Cross-Platform Mobile)

Triumph makes mobile gaming more thrilling by letting players wager -- and win -- real money, play in mass multiplayer games, and compete in social tournaments. We've built the top app in our App Store category and sustained 50% month-over-month growth at a nine-figure annual run rate. We're hyper-scaling our team and continuing to innovate, launching new products like Rips -- our collectibles app -- which reached an eight-figure annualized revenue pace in its first month. And we're just getting started.

Triumph is backed by some of the top consumer VCs including Goodwater Capital, General Catalyst, and DraftKings Drive Fund.

As a Senior Software Engineer on our cross-platform mobile team, you’ll bring our native iOS apps to other platforms (Android, Web) and help accelerate our company growth. You’ll deliver an Android version of our newest product, Rips, our collectibles trading card app which has reached nine-figures in annualized revenue since launching in Fall 2025. As one of our first cross-platform mobile engineers on the team, you’ll set our standards for React Native and push the boundaries of what it means to be one of the fastest growing apps in our category.

• Build and launch one of the largest consumer gaming apps on Android

• Build shared TypeScript libraries to enable expansion of the Triumph Platform to Web.

• Rapidly building and iterating on new features and enhancements to increase engagement and LTV of existing user cohorts.

• Shipping high-quality cross-platform features that scale internationally, including localization, compliance, payments, and region-specific gameplay.

• Establishing and improving cross-platform foundations (navigation, state management, them

• 5+ years of experience building consumer mobile apps with React Native.

• Experience building for all lifecycles of mobile app development - 0->1, migrating from native to cross-platform infrastructure, adding ground-up features to existing apps.

• Comfortable working across both mobile platforms (iOS and Android), including bridging to native modules when required.

• Experience mentoring and onboarding engineers and contributing to shared libraries/components.

• Strong product sense with a bias toward shipping and iterating quickly.

• Bonus: experience crafting slick UI animations or contributing to mobile build systems and tooling.

• High growth. Build a high-scale consumer platform that touches gaming, finance, and social with the autonomy to set our web direction.

• High agency. Small, high-impact engineering team that is growing rapidly with significant opportunity for leadership and growth.

• High energy. Passionate team who are proud of our work and velocity (16x year over year growth).

• Competitive salary and benefits. $400/mo lunch credit, healthcare, vision, dental, 401k, etc.

Our team gathers 5 days a week at Triumph’s headquarters at Levi’s Plaza in San Francisco.