Senior Software Engineer II - Build Global Runner Training Platform

We are 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.

We’re growing extremely fast! In November 2023 we closed a $6.5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. In 2024, we were selected by Apple as one of three global finalists for the iPhone app of the year, reflecting the innovation and impact of what we’ve built. In 2025 we were acquired by Strava!

Our ambition is huge: to become the go-to global leading training platform for millions of runners everywhere. We’re growing with purpose and looking for people who want to build something meaningful with lasting impact. With the recent acquisition by Strava accelerating our journey, now is a really magical time to join.

The team you’ll join:

We are looking for talented, creative and positive team players to join our highly-skilled cross-functional engineering team. You’ll sit in our recently formed Strength Team, where you will collaborate with our modelling engineers, as well as Team Strava, to build the next generation of strength training and redefine how athletes train.

You will work closely with our CTO and engineering leadership team to help shape the future of Runna, who will support you all along this exciting journey. We have a jam-packed roadmap, with countless opportunities to champion new technologies, work on meaningful problems that impact millions of athletes, and improve existing architecture to elevate the whole of our engineering team.

What you’ll be doing:

• Architecting, building, testing and delivering new features across the full stack.
• Working with the Product team to identify the most suitable solution for the best customer experience.
• Collaborating with modelling/AI engineers to design architecture used to interface between the Runna training engine and Runna app.
• Always be on hand to help other team members when they need help on technical matters.
• Coaching and supporting engineers in your team, providing guidance, mentorship, and code reviews without creating bottlenecks.
• Helping us operate more efficiently, by building and maintaining our developer tooling and CI/CD pipeline.
• Rotating the responsibility of releases across each team member, so you will get the opportunity to lead the process and deploy changes to production.
• Impacting the wider engineering team by championing new technologies and setting standards for engineering quality.

What you’ll bring to the team:

• Proficiency working with TypeScript/JavaScript.
• Experience with the technologies in our stack: React Native (worked on large scale applications), Native mobile development (Swift, Kotlin), Cloud platforms, particularly AWS.
• Able to work in a highly skilled engineering team in a fast-paced, iterative environment.
• 4+ years experience in your main expertise area (Frontend, Backend etc).
• Comfortable picking up new things and working on technologies outside your comfort zone.
• Skilled in delivering features end-to-end, from architecture design and building through to releasing, testing and supporting.
• Enthusiasm for our ways of working which include: Iterative development, continuous deployment and test automation, knowledge sharing, pair programming, collaborative design & development, shared code ownership & cross-functional teams.

Bonus points if you have:

• Experience in deployment, releasing cycles or CI/CD.
• Experience with Serverless architectures.
• Experience with Terraform or other IaC tooling (e.g. CDK, CloudFormation, etc.).
• Experience in open source contributions, including reporting bugs/issues in GitHub, testing new releases, or contributing to code.

Compensation Overview & Benefits:

We’re offering a salary of £85,000 - £95,000 per year, depending on experience, plus participation in Strava's long-term incentive (stock) programs. Overview of our benefits are below:

• Flexible working – we typically spend 3 days a week together in our Vauxhall office.
• 25 days holiday, plus bank holidays (which you can take whenever suits you).
• 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.

Please let us know if there’s anything we can do to better accommodate you throughout the interview process.