{"id":704329,"url":"https://alion.io/job/caronsale-senior-backend-engineer-fmx-3","title":"Senior Backend Engineer (f/m/x)","company":{"id":668868,"name":"CarOnSale","domain":"caronsale.com","url":"https://alion.io/company/caronsale","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":81,"open_postings":13,"ghost_share":0,"stale_share":0.769,"repost_share":0,"time_to_fill_p50_days":36,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"freelance","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Brazil"],"countries":["BR"],"hiring_countries":["BR"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":48000,"max_usd":107000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":19},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Confluence","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Kanban","optional":false},{"name":"Nest.JS","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Scrum","optional":false},{"name":"TypeScript","optional":false},{"name":"ElasticSearch","optional":true},{"name":"JavaScript","optional":true},{"name":"WebSockets","optional":true}],"status":"live","first_seen_at":"2026-08-12T08:04:29Z","employer_posted_date":"2026-08-12","last_verified_at":"2026-11-02T06:18:31Z","board_verified":true,"closed_at":null,"days_open":82,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":82},"description":"You don't want another agency contract where someone else owns the architecture and you own the tickets. Here you pick the technology, design the architecture, and set the standards the backend runs on. 40,000 buyers. 20+ countries. 130,000 vehicles sold a year through one auction backend, and you decide how it scales.\nLocation: Remote from anywhere in Brazil, freelance contract. Your day starts at 7:00 local time to overlap with the European engineering team.\nAbout us\nCarOnSale is the AI-powered platform for B2B used car trading in Europe. Over 40,000 buyers from more than 20 countries trade on our platform, and 85% of inventory is exclusive to us. We connect software, pricing intelligence, logistics and financing in one layer, as the operating system for an entire industry.\nOne Platform. One Profit Engine.\nWhat you own\nYou own backend development end to end: technology selection, architecture design, and implementation of the features that carry platform performance and scale\nYou build AI-first. Coding agents, LLMs and AI-assisted development are part of the daily workflow here, not a pilot project\nYou set the standards: code quality benchmarks, development practices, and CI/CD pipelines, agreed cross-functionally and enforced in review\nYou mentor the engineers around you, share what you know, and raise the bar on backend practice\nYou challenge how we work. When our approach is wrong, you say so and you bring the better one\nWhat you bring\n8+ years in software engineering, 5+ of them focused on backend\nDeep TypeScript proficiency, with strong Node.js, NestJS and PostgreSQL experience\nProven mentorship track record: you have coached engineers and raised the standard around you\nSolid command of Git, Docker and CI/CD pipelines\nComfortable in Scrum or Kanban, working with JIRA and Confluence\nEnglish at C1 level or above, written and spoken, for daily work with an international team\nAI-native working style: you use AI tools in your own development workflow and have real judgement about where they accelerate you and where they don't\nAvailable to start your day at 7:00 Brazil local time\nNice to have\nWebSockets or other real-time systems\nSearch frameworks such as Elasticsearch or Lucene\nAutomotive or B2B trading background\nWhat you get\nFully remote from anywhere in Brazil, on a freelance contract\nArchitecture ownership from day one, not after a probation period\nAn engineering culture where AI tooling is embedded in how the work gets done\nDirect access to the European engineering team, not a client-vendor layer in between\nBacking behind the platform you build on: founded 2018, 400 people, €70M Series C in July 2025 led by Northzone and HV Capital\nApply now - your CV is enough.","description_format":"text","description_chars":2717,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Brazil","iso":"BR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Auctions","Marketplaces"],"lifecycle":[{"event":"open","at":"2026-09-11T03:36:37Z"}],"visa":[],"liveness":{"score":12,"band":"cold","label":"Long shot","p_open":1,"p_active":0.43,"p_room":0.28,"age_days":81,"expected_fill_days":36,"reasons":["conf:3","stale_co","win:tail","crowd:"],"computed_at":"2026-11-02T06:13:15Z"},"pay":null,"html_url":"https://alion.io/job/caronsale-senior-backend-engineer-fmx-3","json_url":"https://alion.io/job/caronsale-senior-backend-engineer-fmx-3.json","meta":{"generated_at":"2026-11-02T09:20:51Z","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":13072,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-03T00:00:00Z"}},"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":668868},"rest":"https://alion.io/mcp/rest/get_company?id=668868"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcaronsale-senior-backend-engineer-fmx-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%2Fcaronsale-senior-backend-engineer-fmx-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%2Fcaronsale-senior-backend-engineer-fmx-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/caronsale-senior-backend-engineer-fmx-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcaronsale-senior-backend-engineer-fmx-3"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":704329}},{"tool":"search_jobs","arguments":{"company":"caronsale.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":704329},"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. 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