Senior Modelling Engineer II

🔒 Confidential Employer
Posted 20 April 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£95,000 / 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

FULL DESCRIPTION

Senior Modelling Engineer II at [Employer hidden — view at passion-project.co.uk] in London, UK. Full-time, Hybrid. Salary: £85k-£95k / year.

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 ~5+ 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)
  • Ability to lead complex technical projects from inception to completion, whilst effectively collaborating with cross-functional (e.g. product) team mates
  • Demonstrate best practice in your own work, as well as coaching 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 £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: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 [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!)
  • 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.
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