Senior Software Engineer I (Growth & Marketing Technology)

We’re putting together a talented team to build the #1 training platform for Runners. We help everyday runners become outstanding by building an incredible app providing world‑class training, coaching and community for everyone, whether you’re improving your 5k time or training for your first marathon.

The team you’ll join is looking for a full stack engineer to join our Growth team, with a strong focus on marketing technology. You’ll sit at the intersection of product, data and marketing – building and maintaining the systems that power our acquisition, activation and retention efforts across channels. Although Marketing Technology is a core part of this role, you’ll also spend a significant portion of your time working across full‑stack initiatives in our Growth Product Squad – building features, launching experiments, and iterating based on results.

How We Work

• Cross‑functional, collaborative teams with shared goals.
• Iterative development, continuous deployment and a strong focus on testing and observability.
• High autonomy, high ownership – you’ll have real responsibility for growth outcomes and the systems that support them.

What You’ll Be Doing

• Own implementation and maintenance of ad tracking SDKs and MMPs (for example TikTok, Meta, Google, AppsFlyer), including event mapping and monitoring for signal loss.
• Build and maintain tracking and tag manager setups across web and app so our data is reliable, privacy‑respectful and useful for models and reporting.
• Design, build, test and ship full stack features that support growth (for example landing pages, onboarding flows, referral and promo experiences).
• Integrate and maintain CRM and lifecycle tooling (for example Iterable or similar), including catalogues, data feeds, deeplinks and email / in‑app templates.
• Build internal tools, automations and scripts (for example in Python or Node) that connect systems, improve workflows and power pLTV, dashboards and alerting.
• Collaborate closely with Growth, Marketing and Data to scope experiments and quickly ship A/B tests and campaigns that move key metrics.

What You’ll Bring To The Team

• Solid experience as a full stack engineer (ideally 3+ years), comfortable working across frontend and backend.
• Strong TypeScript/JavaScript skills and experience with modern frontend frameworks (for example React / React Native).
• Hands‑on experience integrating and maintaining marketing technology such as:

• Analytics and product analytics tools.
• Mobile / web attribution.
• Tag managers and event tracking.
• CRM or lifecycle platforms (email, push, in‑app messaging).

Bonus Points If You Have

• Experience with mobile growth and attribution (for example RevenueCat, app store / play store tooling, mobile attribution providers).
• Previous experience in a product‑led or consumer subscription business.
• Experience with experimentation platforms and A/B testing.
• Familiarity with AWS or another major cloud provider and modern CI/CD practices.
• Experience working in or closely with a Growth / Marketing team.

Our Tech Stack

• Frontend: React Native (iOS and Android), Typescript, GraphQL (Apollo Client), Fastlane, SwiftUI (Apple Watch), Maestro, E2E tests.
• Backend: Serverless (AWS), Lambdas (NodeJS & Python), AWS AppSync, DynamoDB, S3, SQS, SNS, EventBridge, SageMaker, Snowflake.

All The Other Good Stuff

• Sentry
• GitHub Actions
• Intercom
• Mixpanel
• RevenueCat
• App Store Connect / Play Store
• Google Tag Manager

Salary and Benefits

• We’re offering a salary of £70,000-£78,000 per year, depending on experience, plus participation in Strava's long‑term incentive (stock) programs.
• Flexible working – we typically spend 3 days a week together in our Vauxhall office.
• 25 days holiday, plus bank holidays.
• Free Runna & Strava subscriptions for you and 3 of your friends.
• Headspace membership.
• Money every year to spend on gear, events and the gym.
• Private health insurance with Bupa and workplace pension scheme.
• Modern Health is a mental wellness platform and app that combines technology with professional support to improve mental well‑being and reduce stress.
• Carrot fertility support – this benefits provider can provide inclusive fertility, hormonal health, and family‑forming benefits to our global employee population and takes the burden off what we know can be a stressful process.