IoT Software Engineer

About The Company

GROPYUS 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.

About the role 

We 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. 

• Improve zero-touch provisioning [Kotlin, Spring Boot, Linux, BLE / Bluetooth Mesh] 
• Enhance monitoring capabilities [BLE / Bluetooth Mesh, Grafana, Prometheus, OTel Collector, Spring Boot] 
• Build a Proof of Concept for the new BOS Architecture based on the defined functional requirements 

The project is open to freelancers based anywhere in the EU, with an expected availability of 30–40 hours per week. 

What you will be doing 

• Build and configure Linux-based IoT and edge systems for smart homes and smart buildings 
• Develop device-to-cloud communication pipelines for telemetry, control, and automation 
• Work on edge computing components running on embedded Linux systems 
• Implement and support device lifecycle management: provisioning, configuration, monitoring, and OTA updates 
• Build internal tools and automation for IoT fleet operations and diagnostics 
• Ensure system reliability, security, and observability across edge and cloud layers 
• Collaborate closely with Product, Hardware, Platform, and Software teams 

About you 

• Strong experience with Linux-based systems in production environments 
• Knowledge of IoT connectivity technologies (BLE, LoRaWAN, WMBus) 
• Hands-on experience with IoT protocols such as MQTT,  
• Hands-on experience with embedded systems or edge computing