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San Francisco, California, United States
Onsite
Responsibilities:
We're hiring a senior iOS engineer to be the technical backbone of the Arcade app. You own every part of the app except the games themselves: the wallet, matchmaking, cashout, onboarding, live multiplayer, and the compliance and integrity systems underneath them.
Because we handle real money, our mobile problems go well beyond UI polish: real-time transaction consistency, fraud and integrity, and compliance that varies by state. Latency and reliability aren't marketing lines here; they directly affect user trust. You'll join a small mobile team (4 today, growing to 7+) where your decisions shape the architecture, not just the implementation.
What you'll do:
Own end-to-end architecture and platform decisions for the Arcade iOS app, the foundation the rest of the mobile team builds on.
Keep the platform healthy: fast builds, reliable CI/CD, and a crash-free app, so product iOS/UX engineers can ship quickly.
Build and maintain the shared platform architecture that lets the game dev team ship new games into Arcade quickly, and that supports expansion into new geographies.
Build and iterate rapidly on features that move engagement, retention, and lifetime value: new game launches, live multiplayer, session depth.
Elevate the team's code and architecture through review, tooling, and design patterns.
Craft the mobile UX that makes Triumph feel like the best gaming app on someone's phone. Sweat the details: animations, transitions, and micro-interactions, the polish that makes an app feel fast and intentional, not just functional.
Build systems where speed and performance genuinely matter, not just marketing language: latency directly affects user experience and trust.
What we're looking for:
4+ years building consumer apps on iOS in Swift, with a track record of owning complex features end to end, from architecture to App Store release, with a focus on speed and scalability.
Expert in Swift, with deep, hands-on knowledge of both UIKit and SwiftUI.
Strong product sense. You understand what makes users stick around, and can translate that into features that actually move the needle.
We want engineers who set the bar in their craft, not just meet it.
Bonus points:
Up to date with best practices for working with AI coding agents. You can design a clean, platform-level mobile architecture that works well with agents while staying readable to humans and safe to build on.
Experience with polished UI animations.
Familiarity with mobile build systems, monorepos, or code generation tooling.
React Native experience. Our cross-platform work (Android, and products beyond Arcade) runs on React Native, and this footprint is growing. Arcade itself is native Swift, but there's room to contribute across it over time.
Experience mentoring or leveling up other engineers.
Why Triumph?
Opportunity to build a scaling consumer mobile app that touches gaming, finance, and social (we build all of our games in house).
Now that we’re scaling rapidly, we’re building a team that can expand the scope of our products and reach. This means you’ll have opportunity to take leadership and grow as an engineer with the company.
Passionate team that is proud of our work.
10x 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.