{"id":2140337,"url":"https://alion.io/job/antal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte","title":"Senior Backend Developer | C# or Node.js (IoT Platform) x 1 FTE","company":{"id":870,"name":"Antal","domain":"antal.pl","url":"https://alion.io/company/antal-sp-z-o-o","size_band":"51-200","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Traffit","truth_index":{"grade":"B","score":81,"open_postings":788,"ghost_share":0.23,"stale_share":0,"repost_share":0.005,"time_to_fill_p50_days":64,"computed_at":"2026-10-21T05:46:15Z"}},"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":["Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":110,"max":140,"currency":"PLN","period":"hour","gross":null,"usd_annual":72000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"Azure","optional":false},{"name":"Azure Cosmos DB","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"WebSockets","optional":false},{"name":"Git","optional":true},{"name":"JavaScript","optional":true},{"name":"Scrum","optional":true}],"status":"live","first_seen_at":"2026-05-28T13:16:17Z","employer_posted_date":"2026-05-28","last_verified_at":"2026-10-21T14:23:39Z","board_verified":true,"closed_at":null,"days_open":146,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":145},"description":"Senior Backend Engineer (C#/ Node.js) - IoT Projects\nWe are looking for an experienced Backend Developer to join a team building modern IoT platform solutions and scalable backend services. The role focuses on developing API and middleware layers used by mobile, web, and internal systems within a distributed cloud-based environment.\nAdditional information\nWork mode: Hybrid (Wrocław) or fully remote\nRate: 110 - 140 PLN/h\nResponsibilities\nDesign and develop backend applications and middleware components for scalable IoT solutions.\nBuild and maintain REST APIs, WebSocket communication, and asynchronous integrations.\nCreate and optimize data models using relational and NoSQL databases.\nCooperate on cloud deployments, CI/CD processes, and infrastructure automation.\nEnsure high software quality through TDD, unit testing, and integration testing.\nWork closely with cross-functional teams in an Agile environment.\nRequirements\nStrong commercial experience with either C#/.NET 6 or Node.js with TypeScript.\nVery good understanding of microservices architecture, REST standards, and event-driven systems.\nHands-on experience with message brokers such as RabbitMQ or Azure Service Bus.\nPractical knowledge of relational databases (SQL Server/PostgreSQL) and NoSQL solutions (MongoDB, Redis, Cosmos DB).\nFamiliarity with cloud and containerized environments, including Azure, Docker, Kubernetes, or Linux-based systems.\nExperience working with CI/CD pipelines and modern deployment practices.\nGood communication skills and fluent English.\nNice to have\nKnowledge of Git workflows and version control best practices.\nExperience with monitoring and logging tools in cloud environments.\nFamiliarity with Agile/Scrum methodologies.","description_format":"text","description_chars":1726,"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":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-09T02:58:10Z"}],"visa":[],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.353,"p_room":0.28,"age_days":145,"expected_fill_days":64,"reasons":["conf:1","agency","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-21T05:46:15Z"},"pay":{"stated_usd_annual":72000,"is_top_pay":false},"html_url":"https://alion.io/job/antal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte","json_url":"https://alion.io/job/antal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte.json","meta":{"generated_at":"2026-10-21T16:08:25Z","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":22874,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"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":870},"rest":"https://alion.io/mcp/rest/get_company?id=870"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fantal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte"},{"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%2Fantal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte"},{"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%2Fantal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte"},{"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/antal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fantal-senior-backend-developer-c-or-node-js-iot-platform-x-1-fte"}]}