Senior Software Engineer (Growth)

Join Runna, a fast-growing startup in the fitness industry, as a Senior Software Engineer (Growth). In this role, you will architect, build, test, and ship high-impact user journeys and subscription funnels, focusing on converting curious visitors into engaged subscribers. You will design and run experiments to improve conversion rates, collaborate with cross-functional teams, and own features end-to-end. As an early hire, you will have a unique opportunity to shape and influence Runna's product and culture.

• Architect, build, test, and ship high-impact user journeys and subscription funnels to improve conversion rates.
• Design and run experiments across web and app onboarding flows, paywalls, and plan discovery to enhance user engagement.
• Collaborate with Product, Design, and Data teams to prioritize opportunities, define success metrics, and make data-driven decisions.
• 2+ years of full stack experience — we value full stack experience more than depth in just one layer
• React experience (React Native is a bonus, not a requirement)
• Solid TypeScript / JavaScript experience
• Experience building user-facing product surfaces where conversion and UX really matter — onboarding, paywalls, landing pages, growth loops, etc
• Comfortable working in a fast paced, iterative environment with lots of experimentation and learning from data
• Able to deliver features end-to-end: from architecture through to rollout, measurement and iteration
• Curious about what didn't work as much as what did
• React or React Native (iOS and Android)
• TypeScript
• App Store Connect / Play Store
• Serverless (AWS) — Lambdas, SQS, DynamoDB, EventBridge, S3
• Sentry, GitHub Actions
• Node.js
• Backend
• Mixpanel, Intercom, RevenueCat
• Tools & Platforms
• Frontend
• GraphQL (Apollo Client)
• Here's what we work with. You won't need all of it on day one
• Google Tag Manager, Snowflake
• Experience with analytics and experimentation tooling (A/B tests, feature flags, etc)
• Experience with Swift or Kotlin for mobile
• Experience working on growth, experimentation, or funnel optimisation teams