{"id":2640199,"url":"https://alion.io/job/relay-technologies-limited-senior-machine-learning-engineer","title":"Senior Machine Learning Engineer","company":{"id":3799710,"name":"Relay Technologies Limited","domain":"relaytech.co","url":"https://alion.io/company/relaytech","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"C","score":68,"open_postings":26,"ghost_share":0.538,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-16T05:45:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":106000,"max_usd":197000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":38},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BigQuery","optional":false},{"name":"Feature Store","optional":false},{"name":"GCP","optional":false},{"name":"Google BigQuery","optional":false},{"name":"Kubernetes","optional":false},{"name":"Machine Learning","optional":false},{"name":"ONNX","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false}],"status":"live","first_seen_at":"2026-07-22T14:18:00Z","employer_posted_date":"2026-07-22","last_verified_at":"2026-10-16T05:31:08Z","board_verified":true,"closed_at":null,"days_open":85,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":85},"description":"Relay is fundamentally reshaping how goods move in an online era. Backed by Europe’s largest-ever logistics Series A ($35M) led by deep-tech investors Plural, and a recently closed Series B ($95M), Relay is scaling faster than 99% of venture-backed startups. We're assembling the most talent-dense team the logistics industry has ever seen\nRelay’s Mission is to free commerce from friction. Today, high delivery costs act as a hidden tax on e-commerce, quietly shaping what can be sold online and limiting who can participate. We envision a world where more goods move more freely between more people, making the online shopping experience seamless and accessible to everyone.\nTHE TEAM\n\n~160 people, around half in engineering, product and data\n45+ advanced degrees across computer science, mathematics and operations research\nThousands of data points captured, calculated, analysed and predicted for every single parcel we handle\nAn intellectually vibrant culture of first-principles thinking, tight feedback loops and relentless experimentation\nEvery parcel Relay handles is touched by ML. We recommend and optimise route assignment, predict delivery durations, estimate parcel dimensions and weight, detect objects in images on device, forecast demand and decide network handovers. That's 10+ models running in the critical path of a live logistics network where quality is non-negotiable.\nML Stack Highlights\nPython and Rust. We keep things simple but use the right tool for the job\n\nRust with ONNX in-process model execution where throughput is critical\n\nChalk.ai as our Feature Store\n\nGCP Agent Platform Endpoints for model serving\n\nCloud-native on GCP. Services run on Kubernetes, with extensive use of BigQuery\n\nThe Opportunity\nAs a Senior Machine Learning Engineer at Relay, you'll:\nOwn critical part of ML: productionising of our models end-to-end, from training pipeline through live integration to measured business impact.\n\nBuild and mature our ML Platform. Evolve the model serving architecture, expand reusable components adoption and set the standards for how Relay ships ML org-wide.\n\nStrengthen existing models by architecting integration and system testing within training pipelines, automated releases and drift monitoring.\n\nLaunch completely revamped processes side by side with data scientists and measure their real-world impact on the network.\n\nWe're looking for candidates who…\nHave at least two years deploying and operating models in production and four years building software on high-performing teams.\n\nAre comfortable diving into unfamiliar codebases and languages to ship a model into a live system.\n\nPrefer building the automation that removes manual labour over repeating it.\n\nWho Thrives at Relay?\nAim with Precision: You define problems clearly and measure your impact meticulously.\n\nPlay to Win: You chase bold bets, tackle the hard stuff, and view constraints as fuel, not friction.\n\n1% Better Every Day: You believe that small, consistent improvements lead to exponential growth. You move quickly, deliver results, and learn from every experience.\n\nAll In, All the Time: You show up and step up. You take ownership from start to finish and do what it takes to deliver when it counts.\n\nPeople-Powered Greatness: You invest in your teammates. You give and receive feedback with care and candour. You build trust through high standards and shared success.\n\nGrow the Whole Pie: You seek out win-win solutions for merchants, couriers, and our customers, because when they thrive, so do we. If these resonate, and you combine strong technical fundamentals with entrepreneurial drive, let’s connect.\n\nRelay is an equal-opportunity employer committed to diversity, inclusion, and fostering a workplace where everyone thrives.","description_format":"text","description_chars":3755,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Commerce"],"lifecycle":[{"event":"open","at":"2026-10-15T18:42:55Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"evidence":"Licensed UK visa sponsor (Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Skilled Worker","cap_exempt":false,"checked_at":"2026-10-16T06:21:30+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.36,"p_room":0.28,"age_days":85,"expected_fill_days":38,"reasons":["conf:0","stale_co","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/relay-technologies-limited-senior-machine-learning-engineer","json_url":"https://alion.io/job/relay-technologies-limited-senior-machine-learning-engineer.json","meta":{"generated_at":"2026-10-16T07:54:50Z","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":5837,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":3799710},"rest":"https://alion.io/mcp/rest/get_company?id=3799710"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frelay-technologies-limited-senior-machine-learning-engineer"},{"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%2Frelay-technologies-limited-senior-machine-learning-engineer"},{"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%2Frelay-technologies-limited-senior-machine-learning-engineer"},{"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/relay-technologies-limited-senior-machine-learning-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frelay-technologies-limited-senior-machine-learning-engineer"}]}