{"id":686596,"url":"https://alion.io/job/zeely-senior-backend-developer-node-js","title":"Senior Backend Developer (Node.js)","company":{"id":685596,"name":"Zeely","domain":"zeely.ai","url":"https://alion.io/company/zeely","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":86,"open_postings":7,"ghost_share":0,"stale_share":0.571,"repost_share":0,"time_to_fill_p50_days":50,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["UA"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Amazon EC2","optional":false},{"name":"Amazon S3","optional":false},{"name":"AWS","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"MySQL","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prisma","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"TypeORM","optional":false},{"name":"JavaScript","optional":true},{"name":"Nest.JS","optional":true},{"name":"Pulumi","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2025-08-25T15:59:59Z","employer_posted_date":"2025-08-25","last_verified_at":"2026-11-04T23:02:10Z","board_verified":true,"closed_at":null,"days_open":436,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":435},"description":"JoinZeely AI as a Senior Backend Developer and help build one of the largest AI products for businesses. We're looking for a strong backend engineer who wants to work on high-load services, influence architectural decisions, and build systems that scale alongside a rapidly growing business.\nOver the past six months, our backend team has grown to 14 engineers, and we're continuing to expand. Today, Zeely is the #1 AI product in its niche in the U.S. market, and our ambitious goal is to become a global company by 2028.\nYou'll be joining a strong engineering environment, working alongside former Tech Leads, Engineering Managers, and Senior Engineers who foster a high engineering standard, support each other's growth, and tackle complex technical challenges together.\nZeely AI is the agentic AI platform for creating, launching, and scaling paid ads.\nWant to see what we're building? Check out examples of our AI-generated videos on our website and across our Instagram, X (Twitter), and LinkedIn. We highly recommend taking a look before applying-it's the best way to experience the product you'll be working on.\nYour key responsibilities:\nDeveloping and maintaining the back-end of web applications\n\nDesigning and building REST APIs\n\nWorking with PostgreSQL and Redis databases\n\nIntegrating with third-party APIs\n\nBuilding and deploying applications on AWS (EC2, S3, CloudFront)\n\nWriting unit and integration tests\n\nOptimizing application performance\n\nDebugging and troubleshooting issues\n\nWriting technical documentation\n\nConducting code reviews\n\nWhat we’re looking for:\n5+ years of commercial experience with Node.js applications\n\n1+ years of experience with microservices architecture\n\n2+ years of hands-on work with Redis and PostgreSQL/MySQL (data modeling, indexing, caching, ORM such as Prisma/TypeORM/Drizzle ORM)\n\nExperience with AWS\n\n2+ years of experience with message brokers\n\n1+ years of experience with Docker\n\nUnderstanding of scalable and reliable system design principles\n\nExperience with version control systems (Git)\n\nNice to have:\n1+ years of experience with the NestJS framework\n\nExperience with payment systems\n\nValid AWS certification\n\nCommercial experience with high-load systems\n\nExperience building back-end for iOS, Android, and web applications\n\nExperience with Terraform/Pulumi\n\nCommercial experience with AI APIs\n\nEnglish level: Upper-Intermediate\n\nWhy it’s exciting to work with us:\nWork with cutting-edge technologies and contribute to building AI-powered tools\n\nJoin a strong A-level team that motivates you to grow and achieve more\n\nRemote-first approach: work from anywhere, with the option to visit our offices in Warsaw and Kyiv\n\nPaid day offs and sick leaves - we care about your work-life balance\n\nRegular performance reviews to ensure your growth is transparent and rewarded\n\nFinancial support - consultations for private entrepreneurs from our dedicated finance team\n\nRecruitment process: Intro call > Test Task > Technical Interview > Final Interview > Reference check > Offer\nSend us your CV - we’d love to get to know you better!","description_format":"text","description_chars":3081,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":true}]},"benefits":[],"hiring_locations":[{"name":"Ukraine","iso":"UA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Real Estate","Sales & Marketing","Advertising"],"lifecycle":[{"event":"open","at":"2026-09-11T00:26:39Z"},{"event":"open","at":"2026-09-26T15:04:49Z"}],"visa":[],"liveness":{"score":6,"band":"cold","label":"Long shot","p_open":1,"p_active":0.217,"p_room":0.28,"age_days":435,"expected_fill_days":50,"reasons":["conf:2","velocity","win:tail","crowd:"],"computed_at":"2026-11-04T06:34:25Z"},"pay":null,"html_url":"https://alion.io/job/zeely-senior-backend-developer-node-js","json_url":"https://alion.io/job/zeely-senior-backend-developer-node-js.json","meta":{"generated_at":"2026-11-05T01:05:00Z","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":1188,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"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":685596},"rest":"https://alion.io/mcp/rest/get_company?id=685596"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fzeely-senior-backend-developer-node-js"},{"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%2Fzeely-senior-backend-developer-node-js"},{"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%2Fzeely-senior-backend-developer-node-js"},{"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/zeely-senior-backend-developer-node-js\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fzeely-senior-backend-developer-node-js"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":686596}},{"tool":"search_jobs","arguments":{"company":"zeely.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":686596},"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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