Transport for London (TfL) is hiring an Embedded Software Engineer for its Wireless Lock product unit. In this role, you will design, build, and deliver secure firmware for the APERIO® wireless access platform, used in battery-powered locks securing buildings worldwide.
What You'll Do
- Develop reliable, secure firmware for wireless, battery-powered locks.
- Implement features on ARM Cortex MCUs (M0–M4) using C.
- Debug at a low level using oscilloscopes, logic analysers, and hardware tools.
- Work across RTOS and bare-metal environments.
- Apply modern embedded practices, including CI/CD and automated testing.
- Improve system performance, stability, and long-term efficiency.
- Enhance connectivity features (BLE, Zigbee, NFC/ISO14443, UWB) and low-power performance.
- Bring insights from IoT trends, cybersecurity, and standards into development.
What We're Looking For
- Strong working experience in embedded C development on ARM Cortex MCUs.
- Ability to debug deeply using hardware tools.
- Experience with RTOS or bare-metal environments.
- Familiarity with CI/CD and structured development practices.
- Clear communication and a collaborative, solutions-focused mindset.
Nice to Have
- Experience with BLE/Zigbee, low-power design, credential technologies, or IoT security trends.
Technical Stack
- C, ARM Cortex MCUs, RTOS
- BLE, Zigbee, NFC/ISO14443, UWB
Team & Environment
You will join the Wireless Lock product unit within Digital & Access Solutions EMEIA, working in a collaborative, on-site culture with direct access to hardware and test rigs.
Benefits & Compensation
- Work that matters securing buildings worldwide.
- Autonomy to influence architecture and explore new ideas.
- Growth opportunities to deepen embedded skills, explore wireless protocols, or grow into technical leadership.
- A collaborative, on-site culture with access to hardware and test rigs.
Work Mode
This role operates on a hybrid basis and is located in Stockholm, Sweden.
We’re committed to building diverse, inclusive teams and encourage applications from all who see themselves thriving here.
