{"id":3085247,"url":"https://alion.io/job/trainline-senior-backend-engineer-net-3","title":"Senior Backend Engineer - .Net","company":{"id":4051,"name":"Trainline","domain":"thetrainline.com","url":"https://alion.io/company/trainline","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","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":{"min":85000,"max":95000,"currency":"GBP","period":"year","gross":null,"usd_annual":127165},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"GCP","optional":false},{"name":"IdentityServer","optional":false},{"name":"New Relic","optional":false},{"name":"Terraform","optional":false},{"name":"C#","optional":true},{"name":"Docker","optional":true},{"name":"DynamoDB","optional":true},{"name":"GitHub Actions","optional":true},{"name":"PostgreSQL","optional":true}],"status":"live","first_seen_at":"2026-10-22T12:19:39Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-24T23:06:04Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"About us\nAt Trainline, our purpose is to empower greener travel choices, connecting people and places. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.\nGreat journeys start with Trainline\nWe’re Europe’s leading independent rail platform, helping millions of travellers find and book the best-value rail and coach journeys across our app, website and partner channels.\nOur job is to make the green travel choice the best choice. By building a better train travel experience, we help more people choose rail - creating a positive impact for customers, our business and the planet.\nWe’re a team of more than 1,000 Trainliners from over 50 nationalities, working across London, Paris, Barcelona, Milan, Edinburgh and Madrid. Now is a brilliant time to join us and help shape the future of travel.\nIntroducing the Backend teams at Trainline\nTrainline’s Backend teams build the core of our product: the journey search that millions of customers use daily, the eCommerce platform behind every booking, and integrations with 270+ travel operators across 45 countries. Each team owns a focused domain, from accounts and notifications to search, payments, carrier integrations and real-time timetables. We’re hiring for our Insurance team, which builds the protection that sits alongside the booking, like Trainline Flex and Trip Cover, so customers can travel with confidence and be prepared when plans change.\nAs a Senior .NET Engineer at Trainline you will...\nShape technical decisions and help the team make good ones\n\nCoach and mentor other engineers, and learn from them too\n\nOwn your work from code through to production, including deployment and monitoring\n\nSpot and remove blockers, time sinks and waste, for yourself and the team\n\nKeep quality high and keep improving the codebase\nOur Tech Stack...\nC# (.NET 6 to 10), DynamoDB, PostgreSQL, AWS, Docker, Terraform, GitHub Actions, New Relic, ELK\nYou’ll be a great fit if you\nCommunicate clearly and enjoy working as part of a team, whether that’s pair-programming, mentoring or collaborating with front-end engineers and other disciplines\n\nHave strong hands-on C# and .NET experience, including recent features\n\nHave built and run microservices and event-driven systems, with a solid grasp of distributed systems and scale\n\nAre comfortable with AWS (Azure or GCP also valuable), Terraform and CI/CD pipelines\n\nCare about observability and keeping production reliable (New Relic, ELK or equivalents)\n\nHave worked with identity and authentication (OAuth2, OpenID Connect, IdentityServer)\n\nAre curious about AI and emerging tools\n\nMore information:\nEnjoy fantastic perks like private healthcare & dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits.\nWe prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. Jump on board and supercharge your career from day one!\nWe're operating a hybrid model and ask that Trainliners work from the office a minimum of 60% of their time over a 12-week period. We also have a 28-day Work from Abroad policy.\nOur values represent the things that matter most to us and what we live and breathe everyday, in everything we do:\nThink Big - We're building the future of rail\n\nOwn It - We focus on every customer, partner and journey\n\nTravel Together - We're one team\n\nDo Good - We make a positive impact\n\nWe know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated.\nInterested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!","description_format":"text","description_chars":4096,"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":["Dental insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Ticketing","Travel Technology"],"lifecycle":[{"event":"open","at":"2026-10-22T13:29:00Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":40,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-24T06:02:35Z"},"pay":{"stated_usd_annual":127165,"is_top_pay":false},"html_url":"https://alion.io/job/trainline-senior-backend-engineer-net-3","json_url":"https://alion.io/job/trainline-senior-backend-engineer-net-3.json","meta":{"generated_at":"2026-10-25T00:18:21Z","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":436,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"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":4051},"rest":"https://alion.io/mcp/rest/get_company?id=4051"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftrainline-senior-backend-engineer-net-3"},{"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%2Ftrainline-senior-backend-engineer-net-3"},{"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%2Ftrainline-senior-backend-engineer-net-3"},{"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/trainline-senior-backend-engineer-net-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftrainline-senior-backend-engineer-net-3"}]}