---
title: 'Senior Backend Engineer II at Runna'
canonical: 'https://feeny.ai/job/senior-backend-engineer-ii-runna-runna-london-ftwh01ewe8p1'
type: 'job'
last_seen: '2026-09-06'
---

# Senior Backend Engineer II at Runna

- **Company:** Runna
- **Location:** Runna London
- **Compensation:** £85k–£95k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-08-06
- **Last confirmed live:** 2026-09-06
- **Apply:** https://jobs.ashbyhq.com/runna/ac1681cc-45b4-48b7-bde9-1e729fb63b35/application

**Skills:** TypeScript, JavaScript, Full-stack development, CI/CD, Testing, Subscription funnels, Conversion engineering, Continuous deployment, Test automation

> Join the Growth Engineering team to build and ship high-impact user journeys and subscription funnels for Runna, a runner training platform. You will lead technical strategy for experimentation, drive cross-team coordination, and own end-to-end feature development while shaping the engineering culture and tooling.

## Job description

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.

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 https://www.strava.com/about?hl=en-GB!

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're looking for a Senior Backend Engineer (II) to join our Special Projects Team, the team responsible for building Runna features directly inside the Strava app. You'll design and build the services that let Strava athletes experience Runna's structure training and workout analysis natively within Strava. This is a rare chance to shape how two products with tens of millions of combined users connect at the data and platform level.

We follow a flexible hybrid model that translates to more than half of your time on-site in our London office — three days per week.

## WHAT YOU’LL BE DOING:

- Design, build, and maintain scalable backend services using Strava’s tech stack (Ruby, Java, Scala, Python, Go, MySQL, Redis, Cassandra, Kafka, Kubernetes, Docker, Elasticsearch, and GraphQL).
- Develop and optimise APIs that seamlessly integrate with client-facing applications to deliver impactful features.
- Partner directly with Strava engineering teams in San Francisco and Berlin to align on data contracts, service boundaries, and integration patterns, which will involve some overlap with US and CET working hours
- Collaborate with cross-functional partners, including product managers, designers, and client-side engineers, to align technical implementation with business needs.
- Mentor and support other engineers, fostering a culture of learning, growth, and technical excellence.
- Ensure service reliability, scalability, and performance while balancing technical debt with new feature development.
- Act as a go-to resource on Strava's backend stack for the wider Runna engineering team, building that fluency through pairing, code review, knowledge-sharing sessions etc.

WHAT YOU’LL BRING TO THE TEAM:

- You have 5+ years of professional software development experience or equivalent expertise in backend engineering.
- You are proficient in at least one of Strava’s core backend languages (Ruby, Java, Scala, Python, or Go).
- You have experience with relational (e.g., MySQL) and NoSQL (e.g., Redis, Cassandra) databases in production environments.
- You have a solid understanding of distributed systems, API design (GraphQL is a plus), and technologies like Kafka, Kubernetes, and Docker.
- You excel at mentoring engineers and fostering a positive, growth-oriented team culture.
- Comfort working with colleagues across US and European time zones, with occasional flexibility on working hours to enable that overlap

## SALARY AND 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 is below:We’re also committed to continually evolving our benefits to support you as we grow.

Here is a brief overview what we currently offer in the UK 🇬🇧

- 🏢 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 (get ready to be your friends fave person or save them for holiday presents!)
- 🧡 Strava membership!
- 🧘 Headspace membership https://www.headspace.com/?gad_source=1&gad_campaignid=917256451&gbraid=0AAAAADLlnJ13ARNhVsl4YugLQIySZ0scx&gclid=CjwKCAjwr5_CBhBlEiwAzfwYuKoHVVF5c9aFVO5mwW4rSr5oRsg1NGAq69m-JAJ88TR56x_k1dBSHRoC3A8QAvD_BwE
- 💸 Money every year to spend on gear, events and the gym!
- 🤑 We’ll give you a voucher to spend on our website so you can buy yourself new Runna kit (and will renew this every year on your work anniversary)
- 🏥 Private health insurance with Bupa and workplace pension scheme
- 💖 Modern Health https://www.modernhealth.com/ ia a mental wellness platform and app that combines technology with professional support to improve mental well-being and reduce stress
- 🥕 Carrot fertility support https://www.get-carrot.com/ - 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.

Please see more info on our amazing benefits here: Benefits at Runna https://www.notion.so/Benefits-at-Runna-197bbd1a44858056a068d897bce297f3?pvs=21

## OUR INTERVIEW PROCESS:

Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages:

Please let us know if there’s anything we can do to better accommodate you throughout the interview process - this can be from scheduling interviews around childcare commitments to accessibility requirements. We want you to show your best self in the process, so please speak to your Talent Partner

## About Runna

## Company Overview
- **One-liner**: Runna is an AI-powered, personalized running coaching app that provides tailored training plans for runners of all levels, from first 5k to ultramarathon.
- **Entity Type**: Private (acquired by Strava in April 2025; previously venture-backed with ~$10.7M in funding)
- **Headquarters**: London, United Kingdom (with a secondary office in Boston, Massachusetts)
- **Founded**: 2021 (LinkedIn lists 2020)
- **Founders**: Dom Maskell (CEO) and Ben Parker (Head Coach)

## Core Business
- **Primary industry**: Health, Wellness & Fitness (running coaching & training technology)
- **Target customers**: B2C – everyday runners (beginners to advanced), in over 180 countries
- **Mission statement**: "Make running training effective, enjoyable and easy for everyone." [runna.com](https://www.runna.com/)

## Products & Services
- **Runna App** (iOS & Android): A subscription-based mobile app that offers personalized training plans built by the “Runna Engine” – an AI that combines coach-led programming with user data. Includes strength training, mobility routines, injury-prevention support, 24/7 live chat coaching, and device syncing (Garmin, Apple Watch, etc.). Priced at $19.99/month or $119.99/year with a free week trial. [runna.com](https://www.runna.com/)

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (acquired by Strava in April 2025 for an undisclosed amount)
- **Key Metric**: Total funding of $10,678,992 across seed rounds. Annual revenue not disclosed. [linkedin.com](https://www.linkedin.com/company/runna)
- **Notable Investors/Partners**: Eka Ventures, JamJar Investments, Venrex, Creator Ventures. Partners include Parkrun, Cancer Research UK, Garmin, Great Run, HYROX, JustGiving. [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna)
- **Growth Signals**:
  - Acquired by Strava in April 2025; both apps remain separate with Strava investing in team and product growth. [runna.com](https://www.runna.com/strava-acquires-runna)
  - 58.3% headcount growth YoY (to 179 employees as of mid-2026). [linkedin.com](https://www.linkedin.com/company/runna)
  - Finalist for Apple’s iPhone App of the Year in 2024.
  - 64,663 LinkedIn followers; 76,000+ App Store ratings with a 4.9 average. [runna.com](https://www.runna.com/)
  - Active in 9 countries with a growing Boston office.

## Competitive Advantages
- **Personalized AI coaching**: The “Runna Engine” adapts plans in real-time based on user performance, goals, and feedback – replacing generic PDF plans or expensive human coaches.
- **Holistic support**: Combines running plans with strength, mobility, injury prevention, and nutrition guidance in one app.
- **High user satisfaction**: 4.9 / 5 on the App Store from 76,000+ ratings, and 4.9 / 5 on Glassdoor (31 reviews, 100% recommend). [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna)
- **Strava backing**: Post-acquisition, Runna gains access to Strava’s 150+ million user community, resources, and API ecosystem.

## Strategic Focus
- **Product acceleration**: Strava’s investment is aimed at growing the Runna engineering team and speeding up product development. [runna.com](https://www.runna.com/strava-acquires-runna)
- **Global expansion**: Continuing to serve runners in 180+ countries, with a growing engineering presence in Boston.
- **Integration depth**: Strengthening the connection between Runna and Strava while keeping the apps independent, enhancing data sync and social features.
- **Talent acquisition**: 17 active job postings (as of mid-2026), with a 41.7% increase in job postings year-over-year. [linkedin.com](https://www.linkedin.com/company/runna)

## Why Work Here
- **Culture**: Glassdoor score of 4.9 – employees consistently describe the culture as “kind, inclusive, and genuinely supportive,” with flat structure and high ownership. 100% of reviewers recommend Runna. [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna)
- **Work model**: Flexi-hybrid – typically 3 days per week in the Vauxhall (London) office or Boston (Harvard Square) office. Casual dress (gym/running outfits are the norm). [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna) Also confirmed in job postings: [jobs.ashbyhq.com/runna](https://jobs.ashbyhq.com/runna/9aa42107-6ea4-46be-9bbe-94c930f4b1e0)
- **Benefits** (partial list):
  - Private health insurance (Bupa)
  - Up to 20 weeks fully paid parental leave (16 weeks for secondary caregivers)
  - Strava equity for all employees
  - Smartwatch upon passing probation
  - Paid hour each week to run/exercise during work hours
  - 25 days holiday + bank holidays
  - Workout Wednesdays (exercise + free team lunch)
  - Bi-weekly team runs and regular social events
  - Cash allowance for sports gear and event entries
  - Salary reviews every 6 months
  - Workplace pension scheme
  - Access to Headspace and Modern Health mental wellness platform. [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna)
- **Engineering culture**: Strong tech stack (Docker, Kubernetes, React, Python, Snowflake, dbt, Terraform, etc.), emphasis on ownership and impact. Active hiring for Senior Software Engineers and a Director of Growth Product.

## Sources
1. [linkedin.com](https://www.linkedin.com/company/runna)
2. [runna.com](https://www.runna.com/)
3. [remotecorgi.co.uk](https://www.remotecorgi.co.uk/companies/runna)
4. [runna.com (Strava acquisition)](https://www.runna.com/strava-acquires-runna)
5. [jobs.ashbyhq.com/runna](https://jobs.ashbyhq.com/runna/9aa42107-6ea4-46be-9bbe-94c930f4b1e0)

## Other roles at Runna

- [Senior Manager, Product Design](https://feeny.ai/job/senior-manager-product-design-runna-runna-london-ddn2j72fvg48) — Runna London
- [Engineering Manager](https://feeny.ai/job/engineering-manager-runna-runna-london-2kc8hd6wdxkv) — Runna London
- [Senior Software Engineer II](https://feeny.ai/job/senior-software-engineer-ii-runna-runna-london-5bag1dezbqex) — Runna London
- [Retention CRM Manager (12 Month Parental Leave Cover)](https://feeny.ai/job/retention-crm-manager-12-month-parental-leave-cover-runna-runna-london-7mc5dxnyhj8e) — Runna London
- [Manager, Growth](https://feeny.ai/job/manager-growth-runna-runna-london-2z61zgqxn77s) — Runna London
- [Business Strategy Manager](https://feeny.ai/job/business-strategy-manager-runna-runna-london-09zax5mxsgvj) — Runna London
- [Senior Director of Product](https://feeny.ai/job/senior-director-of-product-runna-runna-london-ag4k5e26948d) — Runna London
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- [Director of Growth Product](https://feeny.ai/job/director-of-growth-product-runna-runna-london-rfj0sya0e0s5) — Runna London
- [Senior Software Engineer I](https://feeny.ai/job/senior-software-engineer-i-runna-runna-london-eyz9q1ed9hcf) — Runna London