IoT - Unix Software Engineer (Freelance)

We are seeking an experienced IoT Software Engineer to join our team, working across two core disciplines: Linux-based operating system development for edge devices and Azure IoT Edge application development. This role sits at the intersection of embedded systems, cloud-connected software, and cybersecurity. You will be key in hardening our custom Linux OS and applications for IoT deployments, building and maintaining cloud-connected edge software, and driving compliance with emerging cybersecurity regulations including the Cyber Resilience Act (CRA) and NIS2 Directive. 

Responsibilities:

• Develop, maintain, and harden a custom Linux-based operating system (Ubuntu) for IoT edge devices.  
• Build automated OS image CI/CD pipelines and manage system services, networking, and boot processes.  
• Implement OS-level security controls including secure boot, disk encryption, firewall rules, and certificate management.  
• Manage device provisioning and lifecycle using Azure Device Provisioning Service (DPS).  
• Execute global-scale OS rollouts and manage the security update lifecycle.  
• Develop various Azure IoT Edge modules in C# 
• Build machine connectors for telemetry ingestion and predictive maintenance.  
• Write automated tests and technical documentation. 
• Integrate devices with Azure IoT Hub and Device Update for IoT Hub.  
• Maintain container-based workloads and troubleshoot production issues. 
• Support NIS2 and CRA compliance activities.  
• Perform threat modelling, security reviews, and vulnerability remediation.  
• Maintain logging, monitoring, and compliance documentation.  

About You:

• Bachelor degree or a Master degree in computer science or related field. 
• 5+ years’ experience in IoT or embedded Linux software engineering.  
• Strong proficiency in C#. C++/Python a bonus. 
• Microsoft Azure IoT Edge and Docker experience.  
• Strong Linux system administration skills 
• Experience using LLMs for software development 
• Excellent interpersonal and cross-team communication skills. 
• Excellent written and spoken English. 
• Curiosity, willingness to learn, and motivation to help shape TOMRA’s digital capabilities. 

Other Skills

• Experience with NIS2, CRA, or IEC 62443 
• Excellent technical problem-solving, troubleshooting, and follow-up skills. 
• Ability to cooperate with multiple R&D teams in Europe and New Zealand. 
• Organized, detail-oriented and able to break-down work. 
• Self-motivated and disciplined. 
• Willingness to travel internationally to support new digital solutions and/or new applications (<10%).