Senior Mobile Engineer, React Native

About the role

thump! is a mobile-first social sports platform. The app is how players find games, hosts run them, and a community gets built one session at a time. As a senior mobile engineer, you'll own meaningful parts of that experience end to end — the feed people open before work, the host tools they rely on Saturday morning, the ten-second post-game rating that makes the trust system work.

You'll work closely with design and product on a small team where the bar for craft is high. Most decisions are made between two people in a Loom or a doc, not in a meeting.

What you'll do

• Build and maintain core surfaces of the iOS and Android app in React Native (TypeScript).
• Own performance, accessibility, and motion quality on critical flows like Discovery, RSVP, Host, and Post-Game.
• Partner with design on the details — gestures, transitions, empty states, error states.
• Improve the mobile build, release, and QA pipeline so we can ship confidently every week.
• Collaborate with backend on API contracts and on tradeoffs between client-side and server-side logic.
• Mentor other engineers through code review and pairing; raise the team's craft bar.

What we're looking for

• 5+ years of professional mobile engineering experience, with at least 2 years of React Native in production.
• Strong TypeScript fundamentals and a track record of shipping high-quality consumer mobile apps.
• Solid understanding of iOS and Android platform conventions, App Store / Play Store release processes, and native module integration.
• Comfortable owning a feature from product brief to App Store release.
• Excellent written communication — most of our coordination is async.

Bonus, but not required

• Experience with Expo, React Native New Architecture, or Reanimated.
• Experience instrumenting and improving real-user mobile performance.
• Past work on social, marketplace, or community products.
• Personal interest in playing the kinds of games thump! is built for.

Benefits and perks

• Meaningful equity in every full-time offer, explained clearly before you sign.
• Comprehensive medical, dental, and vision — premiums covered for you and dependents from day one.
• Four weeks PTO that we expect you to take, plus a company-wide week off in December.
• Real home-office stipend — chair, monitor, the works.
• Quarterly in-person team weeks, usually with a pickup game on the schedule.
• Monthly game stipend toward gear, court fees, and league dues.

Compensation

$180,000 – $230,000 / yr base salary, plus meaningful equity in every full-time offer.

Base salary range for U.S.-based candidates. Final offer depends on level, location, and experience. Includes meaningful equity. California pay range disclosed in compliance with SB 1162.

Equal opportunity and disclosures

thump! is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, national origin, sex, gender identity, sexual orientation, age, marital status, veteran status, disability status, or any other characteristic protected by applicable law. We are committed to providing reasonable accommodations to qualified candidates and employees with disabilities — please contact contact@thumpapp.com if you need an accommodation during the application or interview process.

For roles open to California-based candidates, the salary range above is provided in compliance with California Labor Code § 432.3 (SB 1162). Final compensation depends on level, location, and experience, and includes equity and benefits as described.