Firmware Developer

Firmware Developer Build the intelligence inside connected devices! Join Casambi as a Firmware Developer—craft embedded software for wireless BLE & mesh systems, harness AI, and power smart lighting. 📡 Build the intelligence inside connected devices. We are looking for an experienced Firmware Developer to join our engineering team and help develop the next generation of Casambi-enabled products. Your primary focus will be embedded software development for wireless devices built on Nordic Semiconductor platforms. You will work with Bluetooth Low Energy (BLE), mesh networking, device communication protocols, and system-level firmware that powers reliable, secure, and scalable lighting control solutions. This role is ideal for someone who enjoys working close to hardware while also understanding complete system architectures, from embedded devices to mobile applications, gateways, and cloud services. We're looking for an engineer who is curious, continuously learns new technologies, and actively uses AI-powered tools to improve development efficiency and software quality. What you'll do • Design, develop, and maintain embedded firmware for wireless products based on Nordic Semiconductor SoCs • Develop software using Nordic SDKs, including nRF Connect SDK and Zephyr-based solutions • Implement and maintain Bluetooth Low Energy (BLE), Bluetooth Mesh, and other wireless communication technologies • Develop and optimize communication protocols between embedded devices, mobile applications, gateways, and cloud services • Participate in architecture, design reviews, code reviews, testing, and debugging activities • Investigate and resolve complex issues across hardware, firmware, wireless communication, and system integrations • Contribute to device provisioning, security, diagnostics, and over-the-air (OTA) firmware update solutions • Collaborate closely with hardware, mobile, cloud, backend, QA, and product teams • Use AI-powered development tools to improve productivity, code quality, troubleshooting, and learning • Participate throughout the entire product lifecycle, from concept and development to deployment, maintenance, and continuous improvement • Contribute to multiple products and technology initiatives as priorities evolve What we're looking for Essential • 5+ years of professional embedded software or firmware development experience • Strong C/C++ programming skills • Experience developing software for ARM Cortex-M based microcontrollers • Experience with Nordic Semiconductor development platforms and SDKs • Solid understanding of Bluetooth Low Energy (BLE) and wireless communication principles • Experience debugging embedded systems using modern development and test tools • Understanding of RTOS concepts and embedded software architecture • Experience with communication protocols and device interoperability • Strong problem-solving and analytical skills • Ability and willingness to learn new technologies and domains • Experience using AI-assisted development tools to improve productivity and software quality • Strong communication and collaboration skills Highly appreciated • Experience with nRF Connect SDK, Zephyr RTOS, or Nordic SoftDevice architectures • Experience with Bluetooth Mesh networking • Experience implementing secure boot, device security, and firmware update mechanisms • Experience with Linux-based embedded systems or gateway devices • Experience with automated testing, CI/CD, and firmware release processes • Understanding of RF technologies and wireless performance optimization • Experience bringing products from concept to mass production and customer deployment • Product-oriented mindset and customer focus Why join us? You'll work on products that combine embedded systems, wireless communication, cloud connectivity, mobile applications, and real-world customer deployments. This role offers the opportunity to solve challenging technical problems while developing technology used in hundredths of thousands of installations worldwide. We value engineers who care not only about writing firmware, but also about delivering successful products that solve real customer problems and continue to provide value long after their initial release. We are looking for product builders, not just firmware developers. Candidates with experience bringing connected products from idea to customer deployment are particularly encouraged to apply. *Applications are processed with the help of AI (for example, to detect and summarize whether criteria are met), but the final assessment is always made by a human. Department Engineering Locations Finland, Espoo Remote status Hybrid Finland, Espoo Our culture We recognize the true value of having a diverse team – from all walks of life and from all parts of the world. At Casambi, you will be working with experienced colleagues and managers where personal and professional growth and development are nurtured. The very nature of technology is fast-paced and continually changing, much like Casambi – there is never a boring day with us! Way of Working Even with our high growth ambitions, we haven’t forgotten our startup roots and the agile way of working. We roll with, and embrace, the change! This means empowering and trusting our Casambians to work autonomously and not be afraid to pitch in with new ideas and ever better ways of doing things. We are a truly international team, so team members are often not even in the same location, which means that flexible attitude to remote working isn’t even in our conversation. Strengths We offer an award-winning disruptive solution to the lighting industry, so having a fast-growth mindset is paramount to our ambitious company goals. With an abundance of high tech knowledge and experience in our company, and with an inclusive, trusting and open attitude to trying out fresh new ideas, we are more than ready to retain our position as a global leader. Why Join Us? We are hugely ambitious with our goals, so we want people that will help drive our growth. In return, we offer an inspiring workplace uniquely suited to providing all you need to be successful as an employee, colleague, and industry professional. Join us on our journey – we are just getting started! About Casambi The Casambi solution is based on Bluetooth Low Energy, the state-of-the-art wireless technology and the only low power wireless technology in all modern smartphones, tablets and even smart watches, making it the only mainstream and future proof low power radio technology in the world. Bluetooth Low Energy was developed at Nokia Research Center where both founders Timo Pakkala and Elena Lehtimäki worked. That’s why Casambi has had the unique advantage in realizing the potential of Bluetooth Low Energy early on. Casambi started the development of the solution before there were any Bluetooth Low Energy devices on the market.