---
title: 'Senior Modelling Engineer I at Runna'
canonical: 'https://feeny.ai/job/senior-modelling-engineer-i-runna-london-218gkxgmy9pc'
type: 'job'
last_seen: '2026-10-18'
---

# Senior Modelling Engineer I at Runna

- **Company:** Runna
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-10-13
- **Last confirmed live:** 2026-10-18
- **Apply:** https://jobs.ashbyhq.com/runna/22a0e6c9-5f45-4b4d-ba22-9b5aa2e09794

## 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. 🚀

As a cross functional (engineering, product, design, coaching) team of >35, the Train Team work at the heart of Runna’s mission: delivering the best training possible to hundreds of thousands of runners worldwide. From creating and dynamically adjusting optimal, personalised training plans at scale, to analysing performance data to make training adjustment recommendations, to providing insight to users derived from their training and environment - we do all things training technology.

We follow a flexible hybrid model that translates to more than half of your time on-site – 3 days per week in Runna's office based in London, UK.

What You’ll Do:

- Building, testing and delivering new and improved training features (such as adjusting plans for illness, injury, weather, incorporating new goal types such as training for consitency)
- Experimenting to improve our training system with new algorithms, design patterns, optimisations and modelling approaches
- Coach and support engineers, providing guidance, mentorship, and code reviews without creating bottlenecks
- Collaborating with coaches to best deliver their expertise to users
- Using a data-led approach to influence algorithms where possible
- Designing and implementing test approaches to ensure consistency and accuracy of training

What You’ll Bring to the Team:

- We’d generally expect ~3+ years of experience in a software engineering, modelling focussed position for this role, however expect this to vary candidate to candidate!
- Proficiency in Python (object orientated) programming, with experience writing production quality code - a bonus for large python projects and leveraging scalable design patterns effectively
- Ability to design and implement complex algorithms and modelling components (e.g. exercise scheduling), and comfortable with quantitative methods and approaches to solving problems - gained through various experiences or studies (e.g., Computer Science, Mathematics, Physics, Engineering degree or equivalent practical experience)
- Demonstrate best practice in your own work, as well as collaborating with other engineers to elevate the quality and velocity of the team
- Testing modelling focused software to ensure quality and maintainability
- A pragmatic mindset, with excellent communication and collaboration skills
- Analytical and detail-oriented, with a commitment to producing high-quality work
- Enthusiasm for our ways of working which include
- Working in a fast-paced, iterative environment whilst maintaining engineering quality
- Iterative development, continuous deployment and test automation
- Knowledge sharing, pair programming, collaborative design & development
- Shared code ownership & cross-functional teams

It’d be a bonus if you:

- Experience with deployment, release cycles or CI/CD
- Experience delivering features end-to-end: from design, to implementation through to releasing, testing and supporting
- Experience in a product focussed organisation, building consumer facing applications

Compensation Overview & 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. Overview of our benefits are 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
- 📱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!)
- 🧘[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!
- 🏥 Private health insurance with Bupa and workplace pension scheme
- 💖[Modern Health](https://www.modernhealth.com/) is 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 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. We'll share the specific stages with you at the start of the process, but you can expect a mix of introductory conversations, role-specific discussions, and the opportunity to meet the team. Please let us know if there's anything we can do to better accommodate you throughout the interview process. This can range 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 Product Designer I](https://feeny.ai/job/senior-product-designer-i-runna-london-wx6m5023qt69) — London, United Kingdom
- [Senior Software Engineer I (Growth)](https://feeny.ai/job/senior-software-engineer-i-growth-runna-london-b0zf63jjzp4s) — London, United Kingdom
- [Senior Director of Product](https://feeny.ai/job/senior-director-of-product-runna-london-ag4k5e26948d) — London, United Kingdom
- [Lead Marketing Analyst, Performance Marketing](https://feeny.ai/job/lead-marketing-analyst-performance-marketing-runna-london-9aw9pnyecbzc) — London, United Kingdom
- [Staff Software Engineer (Full Stack)](https://feeny.ai/job/staff-software-engineer-full-stack-runna-london-qm11wqhrvfg5) — London, United Kingdom
- [Senior Manager, Product Design](https://feeny.ai/job/senior-manager-product-design-runna-london-ddn2j72fvg48) — London, United Kingdom
- [Engineering Manager (Full-Stack)](https://feeny.ai/job/engineering-manager-full-stack-runna-london-2kc8hd6wdxkv) — London, United Kingdom
- [Senior Software Engineer I (Full-Stack)](https://feeny.ai/job/senior-software-engineer-i-full-stack-runna-london-eyz9q1ed9hcf) — London, United Kingdom
- [Senior Software Engineer II (Full-Stack)](https://feeny.ai/job/senior-software-engineer-ii-full-stack-runna-london-pqcn79f0nv88) — London, United Kingdom