{"id":2672617,"url":"https://alion.io/job/healthy-workers-senior-back-end-developer-2","title":"Senior Back-end Developer","company":{"id":680747,"name":"Healthy Workers","domain":"healthyworkers.com","url":"https://alion.io/company/healthyworkers","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Amsterdam, Netherlands"],"countries":["NL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":63000,"max_usd":107000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":62},"experience_years_min":null,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"GitLab CI","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Terraform","optional":false},{"name":"BigQuery","optional":true},{"name":"C#","optional":true},{"name":"Google BigQuery","optional":true},{"name":"Micronaut","optional":true},{"name":"MySQL","optional":true}],"status":"live","first_seen_at":"2026-09-30T11:50:25Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-10-17T14:03:02Z","board_verified":true,"closed_at":null,"days_open":17,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":17},"description":"A few years from now, our platform will run in buildings across the whole of Europe. How the back-end underneath it is built, is decided by you. \nYou'll join the market leader in AI SaaS for commercial real estate as a senior, right as we roll out to Belgium, Luxembourg and Germany. Your architecture decisions won't disappear into a committee: they become the foundation the whole team builds on.\nAbout Healthy Workers\nHealthy Workers is an Amsterdam-based AI SaaS scale-up and the market leader in building optimisation for commercial real estate. Owners of commercial real estate are under real pressure to make their buildings more sustainable. Our platform helps them do that: we connect to the installations in buildings and collect data in order to make them run smarter, using less energy and giving people more comfort. We work directly with those owners. After the Netherlands, we're now rolling out in Belgium, Luxembourg and Germany, with the rest of Europe next.\nWe are informal, lines are short, and you'll work closely with the founders every day.\nWhat you'll do\nYou'll join our Product team as the senior on the back-end. You build alongside the team, and you make sure both the team and the platform are ready for the next stage of growth.\nShape the back-end architecture and write down the decisions, so nobody has to guess a year from now why something was built this way\n\nGet the platform ready for Europe: scalable, fast and reliable, from API to infrastructure\n\nHelp build AI features that control building systems more intelligently\n\nWork with our Data team and SkySpark (our building analytics platform) to make Healthy Workers the single source of truth for all building and customer data\n\nKeep production healthy and the bug backlog under control\n\nCoach colleagues, review code within one working day and make sure no service depends on a single person\n\nWhat your week roughly looks like:\n~60% building: APIs, data models, integrations and AI features\n~20% maintenance, devops and infra: bugs, monitoring, CI/CD and scalability\n~10% code reviews and security (pentests and ISO)\n~10% stand-ups, refinement, sprint planning and retros\nOur stack\nKotlin, Micronaut, MySQL, BigQuery, Docker, Kubernetes, GitLab CI, Terraform, Google Cloud Platform and SkySpark. We plan in Linear.\nComing from Java? Perfect! Kotlin will feel familiar quickly, and with your JVM experience you'll be up to speed within a few weeks.\nWhat you bring\nMust-haves:\nExperienced as a back-end developer with Java or Kotlin\n\nYou've designed APIs and data models for systems that grow, and you've made architecture choices you then had to work with\n\nYou're used to owning production: debugging, monitoring and resolving incidents\n\nDocker, Kubernetes and CI/CD are part of your everyday toolkit\n\nYou make others better through constructive reviews, knowledge sharing and good documentation\n\nYou are fluent in English and live in the Netherlands\n\nPlease note: we can't offer visa sponsorship or relocation support.\n\nNice to have:\nExperience with Terraform, GitLab CI or Google Cloud Platform\n\nKnowledge of C#\n\nExperience with security and certification, such as ISO\n\nAn interest in building, energy or sensor data\n\nWhat you get\nA salary that matches your experience. We'll discuss it openly in the first conversation\n\nA SAR plan (stock appreciation rights), so you share in the growth of Healthy Workers\n\n30 days of paid holiday\n\nA learning and conference budget\n\nCommuting allowance\n\nNo on-call\n\nReal ownership: you work directly with our Founders Jonatan and Guus on where the back-end is heading\n\nThe process\nFrom first conversation to decision takes 2 weeks at most. After every step, you'll hear back from us the next day. No weeks of silence.\nSound like your next step?\nApply via the button below or drop me a message. Your CV or just your LinkedIn profile is enough, no cover letter needed. Want to chat first to see if it's a fit? Let's grab a coffee in Amsterdam or have a quick 15-minute call. Maarten Wolters  or +31 6 13392042.","description_format":"text","description_chars":4057,"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":[],"hiring_excludes":[],"relocation_offered":true,"industries":["Cybersecurity","Real Estate","Commercial Real Estate","Energy Efficiency"],"lifecycle":[{"event":"open","at":"2026-10-16T04:25:03Z"}],"visa":[],"liveness":{"score":66,"band":"ok","label":"Likely open","p_open":1,"p_active":0.733,"p_room":0.9,"age_days":16,"expected_fill_days":30,"reasons":["conf:1","win:mid"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/healthy-workers-senior-back-end-developer-2","json_url":"https://alion.io/job/healthy-workers-senior-back-end-developer-2.json","meta":{"generated_at":"2026-10-17T14:45:35Z","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":19885,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":680747},"rest":"https://alion.io/mcp/rest/get_company?id=680747"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhealthy-workers-senior-back-end-developer-2"},{"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%2Fhealthy-workers-senior-back-end-developer-2"},{"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%2Fhealthy-workers-senior-back-end-developer-2"},{"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/healthy-workers-senior-back-end-developer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhealthy-workers-senior-back-end-developer-2"}]}