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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