{"id":148830,"url":"https://alion.io/job/marks-spencer-staff-software-engineer-experimentation","title":"Staff Software Engineer - Experimentation","company":{"id":45913,"name":"Marks & Spencer","domain":"marksandspencer.com","url":"https://alion.io/company/marks-and-spencer","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Oracle","truth_index":{"grade":"A","score":97,"open_postings":55,"ghost_share":0.036,"stale_share":0.127,"repost_share":0.2,"time_to_fill_p50_days":10,"computed_at":"2026-11-14T05:58:10Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":null,"work_mode":"hybrid","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":143000,"max_usd":254000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":24},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Azure","optional":false},{"name":"GraphQL","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-08-18T00:00:00Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-15T02:37:00Z","board_verified":true,"closed_at":null,"days_open":89,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":88},"description":"Staff Software Engineer - Experimentation team\nWe’re looking for a Staff Software Engineer to play a pivotal role in evolving M&S’s Experimentation platform. This team provides the experimentation capabilities that empower teams across the business to identify savings and drive revenue. Your customers are product teams, engineers, content teams - everyone who works on customer-facing functionality - and your mission is to enable them to run more experiments, more easily and confidently, by creating a robust experimentation platform.\nThis is a role for an engineer who is excited by platform thinking, enablement at scale, and revolutionising how experimentation capabilities are modelled, delivered, and accessed across a large organisation.\nDue to high interest, this role may close earlier than advertised. We recommend applying as soon as possible.\nWhat you’ll do\nYour key accountabilities will include:\nDesign, build, and evolve backend-heavy platform capabilities for experimentation, including APIs, services, automation pipelines, and developer tooling. \nSet technical direction for the Experimentation platform, influencing architecture and standards beyond your team. \nChampion a self-service platform model, building tools, scripts, and automation (including emerging agentic AI use cases) that reduce toil and dependencies. \nPartner closely with product, engineering, and content teams to understand needs, pain points, and future demand. \nMentor engineers at all levels, helping develop strong technical judgement, platform thinking, and engineering craft. \nDemonstrate a production-first mindset: observability, resilience, and safe change are core design concerns. \nProduce clear, high-quality documentation for APIs, systems, standards, and operational processes. \nWho You Are\nA strong platform mindset: you build capabilities and tools that power many teams, not just individual features. \nDeep backend engineering experience with Java/Kotlin, including designing and running distributed systems in production. \nStrong experience on the Azure cloud platform, building and operating scalable, reliable services. \nHands-on experience with GraphQL - schema design, federation, evolution, and API governance (must have). \nWorking knowledge of TypeScript and React, particularly in API, tooling, or integration contexts. \nWhat’s in it for you?\nWorking at M&S means being part of something bigger - helping to deliver quality, value and service to millions of customers every day. We’re inclusive, fast-moving and always evolving, with a strong sense of purpose and a focus on doing the right thing.\nHere are just a few of the benefits that make working here even more rewarding:\n20% colleague discount on all M&S products and many third-party brands for you and someone in your household, available once you’ve completed your probation\nCompetitive holiday allowance with the option to buy more\nStrong pension and life assurance to help plan for the future\nTailored induction and training to support your development from day one\nExclusive perks and savings through our M&S Choices portal\nMarket-leading family policies, including parental, adoption and neonatal leave\n24/7 wellbeing support, including virtual GP access and mental health services\nOne paid volunteer day a year to support a cause that matters to you\nEveryone’s Welcome\nWe are ambitious about the future of retail. We’re disrupting, innovating, and leading the industry into a more conscientious, inspiring digital era. We’re transforming how we work together and offering our most exciting opportunities yet. Marks & Spencer strives to be an inclusive organisation, trusted and admired by our colleagues, customers, and suppliers.\nWe are committed to building diverse and representative teams, where everyone can bring their whole selves to work and be at their best. We support each other and win together.\nIf you’d benefit from any support or reasonable adjustments during any stage of the recruitment process, please let us know when completing your application.\n#hybridrole","description_format":"text","description_chars":4060,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Apparel & Fashion Brands","Online Groceries","Home Decor"],"lifecycle":[{"event":"open","at":"2026-08-18T00:00:00Z"},{"event":"close","at":"2026-08-31T02:04:33Z"},{"event":"reopen","at":"2026-10-19T15:33:50Z"}],"visa":[],"liveness":{"score":13,"band":"cold","label":"Long shot","p_open":1,"p_active":0.48,"p_room":0.28,"age_days":88,"expected_fill_days":10,"reasons":["conf:3","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-14T05:58:10Z"},"pay":null,"html_url":"https://alion.io/job/marks-spencer-staff-software-engineer-experimentation","json_url":"https://alion.io/job/marks-spencer-staff-software-engineer-experimentation.json","meta":{"generated_at":"2026-11-15T05:20:11Z","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":81,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":45913},"rest":"https://alion.io/mcp/rest/get_company?id=45913"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmarks-spencer-staff-software-engineer-experimentation"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fmarks-spencer-staff-software-engineer-experimentation"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fmarks-spencer-staff-software-engineer-experimentation"},{"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/marks-spencer-staff-software-engineer-experimentation\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmarks-spencer-staff-software-engineer-experimentation"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":148830}},{"tool":"search_jobs","arguments":{"company":"marksandspencer.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":148830},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}