Senior Modelling Engineer I

🔒 Confidential Employer
Posted 20 April 2026
LOCATION
London, UK
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£78,375 / year
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Python Algorithms Modelling Software Engineering Testing Communication Collaboration CI/CD

FULL DESCRIPTION

[Employer hidden — view at passion-project.co.uk]

London, UK

GBP 70,125-78,375 / year + Equity

Posted on Apr 17, 2026

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What You’ll Do:

  • Building, testing and delivering new and improved training features (such as strength plans, post injury plans, illness, weather etc)
  • 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 £70,125-£78,375 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

  1. Flexible working – we typically spend 3 days a week together in our Vauxhall office
  2. ️ 25 days holiday, plus bank holidays
  3. Free [Employer hidden] & Strava subscriptions for you and 3 of your friends (get ready to be your friends fave person or save them for holiday presents!)
  4. Headspace membership
  5. Money every year to spend on gear, events and the gym!
  6. Private health insurance with Bupa and workplace pension scheme
  7. Modern Health is a mental wellness platform and app that combines technology with professional support to improve mental well-being and reduce stress
  8. 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.

Compensation Range: £70,125 - £78,375

Apply now

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