Senior Software Engineer I (Growth)

• Join the Growth Engineering team owning key parts of the user journey into Runna, working across web and app to turn first-time visitors into long-term, engaged subscribers. • Collaborate closely with product, design, data, GTM, and business development teams to shape how new users first discover and experience Runna. • Design and run experiments across web and app to improve conversion at every step.

• Have solid TypeScript/JavaScript experience. • Have experience building user-facing product surfaces where conversion and UX really matter, such as onboarding, paywalls, landing pages, and growth loops. • Have React experience. • Have 2+ years of full-stack experience. • Be comfortable working in a fast-paced, iterative environment with lots of experimentation and learning from data. • Be able to deliver features end-to-end from architecture through to rollout, measurement, and iteration. • Be curious about what didn't work as much as what did.

• Have experience with Swift or Kotlin for mobile. • Have experience working on growth, experimentation, or funnel optimisation teams. • Have experience with analytics and experimentation tooling such as A/B tests and feature flags.

• Architect, build, test, and ship high-impact user journeys and subscription funnels, focusing on turning curious visitors into engaged subscribers. • Design and run experiments across web and app including onboarding flows, paywalls, and plan discovery to improve conversion at every step. • Work closely with Product, Design, and Data to help prioritise opportunities, define success metrics, and make decisions grounded in experiment results. • Collaborate across teams to ensure users have a smooth, consistent experience as they move between products and platforms. • Implement and maintain instrumentation, tracking, and tooling to understand behaviour, spot issues quickly, and measure impact. • Own features end-to-end from early discovery and technical design through to implementation, rollout, monitoring, and iteration. • Contribute to developer experience by improving CI/CD, testing, and release workflows so the team can ship and learn quickly.

Runna is one of the most exciting fitness startups in the UK right now, and the Strava acquisition only makes the opportunity bigger. In under four years from launch, Dom and Ben built Runna from a website selling personalised PDF training plans to a globally rated running coaching app, a finalist for Apple's iPhone App of the Year, and ultimately an acquisition by the world's largest fitness community. The team has grown to over 150 people across London and Boston, and Strava has publicly committed to investing further in growing both the team and the product. What stands out on Glassdoor (4.9/5 from 31 reviews, with 100% of employees recommending it) is how consistently people praise the culture, the kindness of their colleagues, and the quality of the leadership. Benefits are genuinely strong for a company this size: private health insurance, enhanced parental leave (up to 20 weeks fully paid), Strava equity, a smartwatch as you pass probation, 25 days holiday plus bank holidays, and a paid hour each week to go for a run during work hours. They operate a flexi-hybrid model, typically three days a week in their Vauxhall office. The team runs bi-weekly together, and Workout Wednesdays include exercise plus a free lunch. The main thing to be aware of is that this is a fast-paced startup environment where priorities can shift quickly, which some reviewers flag as a challenge. There is also a slight bias toward hiring passionate runners, though this has been improving. If you want to work on a product that helped millions of runners train, alongside kind and ambitious people, with the backing and scale of Strava behind you, Runna is a brilliant opportunity.

• Earn a salary of £70,000–£78,000 plus participation in Strava's long-term incentive stock programmes. • Work flexibly with typically 3 days a week in the Vauxhall office, with flexibility around life commitments. • Get 25 days holiday plus bank holidays. • Receive free Runna and Strava subscriptions for you and 3 friends. • Access private health insurance with Bupa and workplace pension scheme. • Get a Headspace membership and Modern Health mental wellness platform. • Access Carrot fertility support. • Receive an annual budget for gear, events, and the gym.

Runna helps everyday runners become outstanding by building an incredible app providing world-class training, coaching, and community for everyone. In 2024, Runna was selected by Apple as one of three global finalists for the iPhone app of the year. In 2025, Runna was acquired by Strava. The tech stack includes React Native, TypeScript, GraphQL, Node.js, Serverless AWS, DynamoDB, and Snowflake.