{"id":37378,"url":"https://alion.io/job/duffel-software-engineer-backend","title":"Software Engineer (Backend)","company":{"id":8528,"name":"Duffel","domain":"duffel.com","url":"https://alion.io/company/duffel","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":92,"open_postings":3,"ghost_share":0,"stale_share":0.333,"repost_share":0,"time_to_fill_p50_days":52,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","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":74000,"max_usd":180000,"period":"year","method":"role_country_seniority_unknown","sample_n":383},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Elixir","optional":false},{"name":"GCP","optional":false},{"name":"Kubernetes","optional":false}],"status":"live","first_seen_at":"2026-05-28T07:45:36Z","employer_posted_date":"2026-05-28","last_verified_at":"2026-10-18T12:23:36Z","board_verified":true,"closed_at":null,"days_open":143,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":142},"description":"Software Engineer London | Full-time | Hybrid | Shoreditch/Liverpool Street\nCreate the Future of Travel With Us\nWhether it's visiting the people closest to us, starting an exciting adventure, or a career-defining business trip, travel is essential.\nYet we've all experienced the aches and pains of getting to our destination.\nMore than 4 billion airline passengers rely on technology that hasn't kept up with modern expectations. That's why we're rebuilding the infrastructure that underpins the travel industry - simplifying systems and building tools that will make the future of travel effortless.\nWe were part of Y Combinator S18's cohort and we're backed by Benchmark, Blossom, Index Ventures, and Kima Ventures - a fantastic set of investors that has helped build some of the world's largest companies.\nOur London team is growing, and we're looking for talented people to join us on our journey.\nEngineering at Duffel\nWe're building tools to simplify travel distribution, search, and booking through one seamless API. The technical challenge? Design a beautiful API, then integrate it with hundreds of travel providers - each with different systems and requirements - whilst delivering a fantastic developer experience.\nWe work with Elixir, Phoenix, Kubernetes, and Google Cloud Platform, but we value strong engineering fundamentals over specific tech experience.\nYou'll Thrive Here If:\nYou're passionate about designing beautiful APIs and creating great developer experiences\nYou have a high bar for code quality and API design\nYou have opinions on good engineering standards and processes as we define ours at Duffel\nYou think big picture - making tradeoffs between technical work and business impact\nYou communicate clearly, articulating what you're working on and why in a structured way\nYou thrive collaboratively - you believe in your methods but stay open to feedback and suggestions\nBonus: Experience in travel, flights, hotels, or cars\nWhat You'll Get:\nCompetitive salary + equity (you'll own part of Duffel)\nWork from anywhere policy\nDuffel travel allowance (use what we build)\nMatched parental leave\nSabbatical programme (3 months full pay)\nOffice in Shoreditch + regular team socials\nWhy Now Matters\nYou'll work on the core API powering millions of travel bookings. Early-stage role = outsized impact on how we build and scale.","description_format":"text","description_chars":2346,"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":["Equity","Parental leave"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Travel Technology"],"lifecycle":[{"event":"open","at":"2026-05-28T07:45:36Z"}],"visa":[],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.35,"p_room":0.28,"age_days":141,"expected_fill_days":52,"reasons":["conf:2","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/duffel-software-engineer-backend","json_url":"https://alion.io/job/duffel-software-engineer-backend.json","meta":{"generated_at":"2026-10-18T13:10:18Z","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":19569,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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":8528},"rest":"https://alion.io/mcp/rest/get_company?id=8528"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fduffel-software-engineer-backend"},{"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%2Fduffel-software-engineer-backend"},{"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%2Fduffel-software-engineer-backend"},{"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/duffel-software-engineer-backend\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fduffel-software-engineer-backend"}]}