What you will do
We are looking for a Firmware Engineer to join our engineering team and contribute to the development of embedded firmware used in security-critical systems deployed worldwide.
In this role, you’ll work on real-world embedded products, collaborating closely with hardware, software, and systems engineers. You’ll be involved throughout the product lifecycle—from development and debugging to supporting production and continuous improvement.
This is a hands-on, technical position suited to an engineer who enjoys practical problem-solving and building reliable, well-engineered embedded solutions.
How you will do it
Embedded Firmware Development
*Design, develop, and maintain firmware for embedded systems, primarily in RTOS-based environments
*Implement and debug multithreaded firmware, using RTOS primitives such as semaphores, queues, and signals
*Develop finite state machines to ensure predictable and robust device behaviour
*Interface firmware with MCU peripherals and internal communication protocols including SPI and I²C
*Apply secure coding practices and contribute to firmware developed with security considerations in mind
Networking & Security
*Contribute to embedded networking functionality using standard concepts such as TCP/IP and client/server communication
*Work with existing secure communication technologies (e.g. TLS) and common cryptographic algorithms
*Support integration with access-control communication standards such as OSDP
Smart Card & RFID
*Support firmware interacting with smart-card and RFID technologies
*Work with industry standards such as ISO 14443 and ISO 15693
*Assist with maintaining compatibility with existing and customer-specific card technologies
Hardware Interaction & Debugging
*Work alongside hardware engineers using schematics and system diagrams
*Debug hardware/firmware interactions using oscilloscopes, logic analysers, and other diagnostic tools
*Interface with common embedded hardware including RS485, Ethernet, NFC, and digital I/O
Problem Solving & Collaboration
*Investigate and resolve issues across firmware and hardware components
*Participate in root-cause analysis and contribute to practical, low-risk solutions
*Take part in code reviews and team discussions to support continuous improvement
What we look for
Essential
*Right to work in the UK
*Willingness to work on-site three days per week
*Commercial experience developing embedded firmware, ideally in real-time or resource-constrained environments
*Strong programming skills in C; exposure to C++ or Java is beneficial
*Experience with embedded development tools and version control (Git)
*Understanding of microcontrollers, embedded peripherals, and hardware fundamentals
*Exposure to networked embedded systems and secure communication concepts
*Confident debugging skills using standard hardware and software tools
*Ability to work independently on assigned tasks while collaborating effectively within a multidisciplinary team
Desirable
*Experience with embedded Linux or Android-based systems
*Exposure to smart-card, RFID, or access-control systems
*Experience working in regulated, security-focused, or safety-critical environments
*Familiarity with industrial systems or PLC-integrated environments
What we offer
* Work on innovative, industry-leading security products used worldwide.

* Join an experienced engineering team with strong technical depth.

* Opportunities for technical leadership, architecture influence, and career progression.

* Competitive salary, benefits, and flexible working options.

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