Mobile App Lead

About Us

Fact Machine is reinventing how people engage with opinions online. We run 24-hour prediction markets on subjective questions - think "Should the US acquire Greenland?" or "Is this the right take?"- where users trade on predicted consensus outcomes. We've raised $8.2M and are preparing for public launch in the next 3 months after a successful closed alpha.

The team is ex-Hinge, Tik Tok, and other consumer apps that people actually open every day. We're obsessively product- and user-focused - we think in terms of engagement loops. The app we're building is meant to be addictive in the best way: haptics when you win, streaks that keep you coming back, leaderboards that make you want to beat your friends.

Think less "fintech" and more "game you can't put down."

We need a React Native engineer to own our mobile app from the ground up. This is a spearhead role - you ll be the owner of the majority of mobile engineering on the team, shaping architecture decisions, building the foundation, and shipping a consumer-grade iOS app that becomes our primary growth channel.

This isn t a "port the website to mobile" job. Mobile is core to how Fact Machine works. Everything needs to feel native, fast, and addictive on your phone. We re building something that blurs the line between a game and a financial product and is incredibly habit forming - smooth animations, satisfying feedback loops, and a UI that captures your attention.

You ll work closely with our founders, designers and engineers to translate a product that s already working on web into something even better on mobile.

• Own the mobile app end-to-end - architecture, UI/UX implementation, performance, and shipping cadence

• Build the core user flows - voting, prediction, trading, and rewards — with a focus on speed, polish, and delight

• Obsess over the little things - the satisfying tap, the confetti burst, the streak counter ticking up. The details are the product.

• Work closely with design and product to translate our brand (think: light gradients, smooth animations, big bold interactions) into a native mobile experience

• Integrate with our backend and smart contracts - real-time market data, Web Socket feeds, and on-chain interactions

• Ship fast and iterate - we re a startup, and we need the app in users  hands as soon as possible and to be iterating constantly based on their behavior

• Set the bar for mobile engineering - you ll likely be hiring more mobile engineers down the line; build something you re proud of and that scales

Must-haves:

• 3+ years of professional React Native experience

• Shipped at least one consumer app to the App Store (iOS required; Android a bonus)

• Strong sense of mobile UX - you care about animations, snappy interactions, and intuitive navigation

• Comfortable working in a fast-moving, small-team environment

• Experience integrating with RESTful APIs and Web Sockets

• Solid understanding of state management (Redux, Zustand, Jotai, or similar)

Nice-to-haves:

• Experience building gamified or consumer-social apps (dating, social media, gaming, etc.)

• Experience with financial apps, trading UIs, or real-time data dashboards

• Familiarity with blockchain integrations (or willingness to learn fast)

• Experience with push notifications and background sync

• Expo experience (we re evaluating bare vs. managed workflow)

• Previous startup experience

• You're building something that doesn t exist yet. Opinion markets are a new category. You're not iterating on a mature product - you're helping define what this looks like on mobile.

• The team gets consumer products. We already know how to build things people come back to. You ll be in good company.

• Small team, big impact. 8 people. Your decisions stick..

• The product is genuinely fun. We're not building another finance app that feels like a spreadsheet. This app is habit forming. Think gamified rewards, leaderboards, streaks, lootboxes.