{"id":683922,"url":"https://alion.io/job/gropyus-freelance-iot-software-engineer-all-genders","title":"Freelance IoT Software Engineer (all genders)","company":{"id":672914,"name":"GROPYUS","domain":"gropyus.com","url":"https://alion.io/company/gropyus","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"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":["Berlin, Germany"],"countries":["DE"],"hiring_countries":["DE"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":69000,"max_usd":148000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":24},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"LoRaWAN","optional":false},{"name":"MQTT","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Redis","optional":false},{"name":"Time Series","optional":false},{"name":"Grafana","optional":true},{"name":"Java","optional":true},{"name":"Prometheus","optional":true},{"name":"Spring Boot","optional":true}],"status":"closed","first_seen_at":"2026-09-02T11:26:29Z","employer_posted_date":"2026-09-10","last_verified_at":"2026-11-04T14:45:16Z","board_verified":false,"closed_at":"2026-11-04T14:45:16Z","days_open":63,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":62},"description":"About The Company\nGROPYUS is a technology-based construction company focused on building multi-story residential buildings. Thanks to its prefabricated building system with a wide range of design options, automated offsite construction, and fully digitalized processes, the company is able to create resilient timber housing quickly and cost-effectively. GROPYUS is using scalable construction and manufacturing solutions to tap into a future market, strengthen Europe’s innovation capacity, and play a substantial role in improving sustainability. The company delivers its multi-family houses as a complete and turnkey solution. The combination of technology, construction, robotics, and manufacturing expertise means buildings can be created in a fully digitalized end-to-end process. The building system is based on versatile wall and slab elements, making it easier to optimize land use, customize plans, and build fast with both off-site construction and on-site assembly. This system is complemented by the Building Operating System-developed in-house.\nAbout the role \nWe are looking for a Senior Software Engineer freelancer to support GROPYUS on a 10-month project focused on our Smart Living and Smart Building technology stack. \nImprove zero-touch provisioning [Kotlin, Spring Boot, Linux, BLE / Bluetooth Mesh] \nEnhance monitoring capabilities [BLE / Bluetooth Mesh, Grafana, Prometheus, OTel Collector, Spring Boot] \nBuild a Proof of Concept for the new BOS Architecture based on the defined functional requirements \nThe project is open to freelancers based anywhere in the EU, with an expected availability of 30-40 hours per week. \nWhat you will be doing \nBuild and configureLinux-based IoT and edge systems for smart homes and smart buildings \nDevelop device-to-cloud communication pipelines for telemetry, control, and automation \nWork on edge computing components running on embedded Linux systems \nImplement and support device lifecycle management: provisioning, configuration, monitoring, and OTA updates \nBuild internal tools and automation for IoT fleet operations and diagnostics \nEnsure system reliability, security, and observability across edge and cloud layers \nCollaborate closely with Product, Hardware, Platform, and Software teams \nAbout you \nStrong experience with Linux-based systems in production environments \nKnowledge of IoT connectivity technologies (BLE, LoRaWAN, WMBus) \nHands-on experience with IoT protocols such as MQTT, \nHands-on experience with embedded systems or edge computing \nSolid understanding of distributed and event-driven architectures \nProficiency in Kotlin \nExperience with containers, cloud platforms, and infrastructure components (e.g. PostgreSQL, Redis, message brokers, K8s clusters) \nExperience with telemetry, streaming data, and time-series data \nA collaborative mindset and willingness to take ownership \nNice to have \nExperience with embedded Linux, OTA systems, or secure device identity \nKnowledge of observability and monitoring across edge and cloud systems \nJoin us on our mission to design buildings as continuously evolving products to create the most exciting and affordable experience for all. We build for people and conserve the resources of our planet. We can't wait to get to know you. For more information, visit our website.","description_format":"text","description_chars":3306,"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":[],"hiring_locations":[{"name":"Germany","iso":"DE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Property Development","Construction"],"lifecycle":[{"event":"open","at":"2026-09-10T23:57:01Z"},{"event":"close","at":"2026-11-04T14:45:16Z"}],"visa":[],"liveness":null,"pay":null,"html_url":"https://alion.io/job/gropyus-freelance-iot-software-engineer-all-genders","json_url":"https://alion.io/job/gropyus-freelance-iot-software-engineer-all-genders.json","meta":{"generated_at":"2026-11-15T13:41:42Z","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":4523,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":672914},"rest":"https://alion.io/mcp/rest/get_company?id=672914"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgropyus-freelance-iot-software-engineer-all-genders"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fgropyus-freelance-iot-software-engineer-all-genders"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fgropyus-freelance-iot-software-engineer-all-genders"},{"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/gropyus-freelance-iot-software-engineer-all-genders\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgropyus-freelance-iot-software-engineer-all-genders"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":683922}},{"tool":"search_jobs","arguments":{"company":"gropyus.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":683922},"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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