Senior Modelling Engineer

Runna

. Build, test and deliver new and improved training features .

Posted 10/14/2026full-timeLondon • United KingdomSenior💰 £70,000 - £78,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in Python programming with a strong focus on designing and implementing complex algorithms and modeling components. Demonstrates analytical skills and a commitment to high-quality work through effective testing and collaboration in a fast-paced environment.

Highest-signal resume keywords

Python ProgrammingAlgorithm DesignModeling ComponentsTesting SoftwareCI/CD Familiarity

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Applicant Tracking System Keywords

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Hard Skills

Object Oriented ProgrammingProduction Quality CodeQuantitative MethodsComplex Algorithm DesignTesting Approaches

Soft Skills

Communication SkillsCollaboration SkillsAnalytical MindsetDetail-OrientedMentorship

Tools & Technologies

Continuous DeploymentTest AutomationCode Review ToolsPerformance Analysis Tools

Industry Keywords

Software EngineeringModeling Focused PositionConsumer Facing ApplicationsProduct Focused OrganisationIterative Environment

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Build, test and deliver new and improved training features
Experiment with new algorithms, design patterns, optimisations and modelling approaches
Coach and support engineers through guidance, mentorship and code reviews
Collaborate with coaches to deliver their expertise to users
Use a data-led approach to influence algorithms
Design and implement testing approaches to ensure consistency and accuracy of training
Work with the Train Team to deliver personalised training plans, performance analysis and training adjustment recommendations for runners worldwide

Requirements

What you’ll need

~3+ years of experience in a software engineering, modelling focussed position
Proficiency in Python (object orientated) programming
Experience writing production quality code
Ability to design and implement complex algorithms and modelling components
Comfortable with quantitative methods and approaches to solving problems
Computer Science, Mathematics, Physics, Engineering degree or equivalent practical experience
Testing modelling focused software to ensure quality and maintainability
Pragmatic mindset, with excellent communication and collaboration skills
Analytical and detail-oriented, with a commitment to producing high-quality work
Experience with deployment, release cycles or CI/CD is a bonus
Experience delivering features end-to-end is a bonus
Experience in a product focussed organisation, building consumer facing applications is a bonus
Willingness to work in a fast-paced, iterative environment
Familiarity with continuous deployment and test automation
Familiarity with knowledge sharing, pair programming, collaborative design and development, shared code ownership, and cross-functional teams
Ability or willingness to work three days per week on-site in London

Benefits

Comp & perks

Participation in Strava's long-term incentive (stock) programs
Flexible working model
25 days holiday, plus bank holidays
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
Workplace pension scheme
Modern Health mental wellness platform and app
Carrot fertility support
Interview accommodations for childcare commitments and accessibility requirements