{"id":2504518,"url":"https://alion.io/job/runna-senior-modelling-engineer-i","title":"Senior Modelling Engineer I","company":{"id":1770154,"name":"Runna","domain":"runna.com","url":"https://alion.io/company/runna-com","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":70000,"max":78000,"currency":"GBP","period":"year","gross":null,"usd_annual":103294},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-10-13T22:32:55Z","employer_posted_date":"2026-10-13","last_verified_at":"2026-10-15T15:37:18Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"We're putting together a talented team to build the #1 training platform for Runners\nWe 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.\nWe’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!\nOur 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.\nAs 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.\nWe 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.\nWhat You’ll Do:\nBuilding, 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)\n\nExperimenting to improve our training system with new algorithms, design patterns, optimisations and modelling approaches\n\nCoach and support engineers, providing guidance, mentorship, and code reviews without creating bottlenecks\n\nCollaborating with coaches to best deliver their expertise to users\n\nUsing a data-led approach to influence algorithms where possible\n\nDesigning and implementing test approaches to ensure consistency and accuracy of training\n\nWhat You’ll Bring to the Team:\nWe’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!\n\nProficiency in Python (object orientated) programming, with experience writing production quality code - a bonus for large python projects and leveraging scalable design patterns effectively\n\nAbility 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)\n\nDemonstrate best practice in your own work, as well as collaborating with other engineers to elevate the quality and velocity of the team\n\nTesting modelling focused software to ensure quality and maintainability\n\nA pragmatic mindset, with excellent communication and collaboration skills\n\nAnalytical and detail-oriented, with a commitment to producing high-quality work\n\nEnthusiasm for our ways of working which include\nWorking in a fast-paced, iterative environment whilst maintaining engineering quality\n\nIterative development, continuous deployment and test automation\n\nKnowledge sharing, pair programming, collaborative design & development\n\nShared code ownership & cross-functional teams\n\nIt’d be a bonus if you:\nExperience with deployment, release cycles or CI/CD\n\nExperience delivering features end-to-end: from design, to implementation through to releasing, testing and supporting\n\nExperience in a product focussed organisation, building consumer facing applications\n\nCompensation Overview & Benefits:\nWe’re offering a salary of £70,000 - £78,000 per year, depending on experience, plus participation in Strava's long-term incentive (stock) programs.\nOverview 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\nFlexible working - we typically spend 3 days a week together in our Vauxhall office\n\n25 days holiday, plus bank holidays\n\nFree Runna & Strava subscriptions for you and 3 of your friends (get ready to be your friends fave person or save them for holiday presents!)\n\nHeadspace membership\n\nMoney every year to spend on gear, events and the gym!\n\nPrivate health insurance with Bupa and workplace pension scheme\n\nModern Health is a mental wellness platform and app that combines technology with professional support to improve mental well-being and reduce stress\n\nCarrot 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.\n\nPlease see more info on our benefits here: Benefits at Runna\nOur Interview Process\nOur 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.\nPlease 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!","description_format":"text","description_chars":5790,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Health insurance"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Fitness","Consumer Health Apps"],"lifecycle":[{"event":"open","at":"2026-10-14T07:11:13Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":32,"reasons":["conf:1","win:early"],"computed_at":"2026-10-15T05:46:00Z"},"pay":{"stated_usd_annual":103294,"is_top_pay":false},"html_url":"https://alion.io/job/runna-senior-modelling-engineer-i","json_url":"https://alion.io/job/runna-senior-modelling-engineer-i.json","meta":{"generated_at":"2026-10-15T16:22:56Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":24971,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1770154},"rest":"https://alion.io/mcp/rest/get_company?id=1770154"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frunna-senior-modelling-engineer-i"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Frunna-senior-modelling-engineer-i"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Frunna-senior-modelling-engineer-i"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/runna-senior-modelling-engineer-i\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frunna-senior-modelling-engineer-i"}]}