Senior Embedded Firmware Engineer – Wireless Access control & IoT
Location: Stockholm, Sweden
Hybrid role | Digital & Access Solutions EMEIA
Build Secure Embedded Firmware for ARM Cortex-Based Wireless IoT Devices Used in Real-World Access Systems
At ASSA ABLOY you will develop the firmware behind APERIO® — a globally deployed range of wireless locks used in environments where reliability, security, and performance are non-negotiable.
If you enjoy working close to hardware, debugging real time system behaviour, and building firmware that operates under strict power, security, and reliability constraints — this role will likely resonate.
Why this role matters
Wireless access control systems are becoming smarter, more connected, and increasingly security-critical. The firmware behind these devices directly impacts reliability, performance, connectivity, and user trust.
As part of our Wireless Lock product unit, you’ll help shape the next generation of secure embedded IoT solutions — contributing directly to how our products perform in the field and influencing technical decisions that affect global deployments.
The role
This is a senior engineering role where you own the design and evolution of embedded firmware for wireless access devices operating in constrained, security-critical environments. You will influence architecture, make key technical decisions, and ensure reliability, performance, and security across real-world deployments.
You’ll collaborate closely with hardware and product teams, translating system requirements into robust embedded solutions that scale across global installations.
What you’ll work on
- Develop secure and reliable embedded firmware in C for ARM Cortex M0–M4 platforms
- Implement and improve wireless connectivity features including BLE, Zigbee, NFC/ISO14443
- Debug complex embedded systems using oscilloscopes, logic analysers, and other hardware tools
- Work across RTOS and bare-metal environments, contributing to robust and maintainable architectures
- Improve low-power performance and battery efficiency for connected devices
- Contribute to CI/CD pipelines, automated testing, and modern embedded development practices
What will help you succeed
- 5+ years of expertise in embedded C development on ARM Cortex MCUs (STM32, nRF52, TI, or similar)
- Solid experience with RTOS and/or bare-metal systems
- Strong background in firmware architecture work and specifications
- Proven track record in mentoring more junior developers
- Practical experience with CI/CD setup
You have strong expertise in one or more of the following areas:
- wireless communication technologies (such as BLE, Zigbee, UWB, Wi-Fi) and protocols, ultra low-power optimisation.
- Embedded security design and protocols, cybersecurity compliance, RFID/NFC technology, access control systems.
Why ASSA ABLOY
At ASSA ABLOY, you’ll join a global technology leader while working in a team where embedded engineering plays a central role in product innovation. You’ll have the freedom to influence technical decisions, work closely with real hardware, and build products used by millions of people worldwide.
- Meaningful mission — Build technology that helps secure hospitals, schools, workplaces, and public spaces globally
- Innovation and scale — Work with wireless IoT technologies, secure access systems, and connected embedded devices at global scale
- Autonomy and trust — Influence firmware architecture, technical direction, and product improvements in a collaborative engineering culture
- Growth and development — Deepen your expertise in embedded systems, wireless communication, low-power design, and technical leadership
- Work–life balance — Be part of a sustainable Scandinavian work culture focused on collaboration, flexibility, and long-term success
Ready to help shape the future of wireless access?
If you’re motivated by embedded systems, connected devices, and solving real-world technical challenges, we’d love to hear from you.
Apply today and help us create safer, smarter, and more connected environments worldwide.
We review applications continuously, so don’t wait.
We’re committed to building diverse, inclusive teams and encourage applications from all who see themselves thriving here. To make sure your personal data stays protected, we do not review applications sent via email or post. If you have questions about the role or process, contact Léa Rein, Senior Talent Acquisition Business Partner at [email protected].
Let’s create a safer and more open world — together.
We are the ASSA ABLOY Group
Our people have made us the global leader in access solutions. In return, we open doors for them wherever they go. With nearly 63,000 colleagues in more than 70 different countries, we help billions of people experience a more open world. Our innovations make all sorts of spaces – physical and virtual – safer, more secure, and easier to access.
As an employer, we value results – not titles, or backgrounds. We empower our people to build their career around their aspirations and our ambitions – supporting them with regular feedback, training, and development opportunities. Our colleagues think broadly about where they can make the most impact, and we encourage them to grow their role locally, regionally, or even internationally.
As we welcome new people on board, it’s important to us to have diverse, inclusive teams, and we value different perspectives and experiences.
