Senior Firmware Engineer

What you will do

As a Senior Firmware Engineer you will aid in the design development and maintenance of embedded firmware across a range of CEM Systems hardware platforms. You will work closely with hardware software and systems teams to deliver reliable secure and high-performance solutions used globally in critical infrastructure airports data centres and enterprise environments. This is a hands-on technical position involving firmware design secure solution development problem-solving and full product lifecycle support.

How you will do it

Embedded Firmware Development

• Design implement and support firmware for embedded systems using RTOS-based environments.

• Develop/maintain/debug multi threaded firmware applications using signals semaphores mailboxes and other RTOS primitives to manage constrained resources.

• Create clear robust finite state machine logic for deterministic device behaviour.

• Implement internal communication protocols including SPI I²C and other MCU subsystems.

• Design for Security develop firmware with latest cyber security practices at the core

Networking & Security Protocols

• Develop and maintain embedded networking features using the ISO model including TCP/IP routing subnets client/server operation.

• Integrate secure communication technologies including TLS (MBED WolfSSL) and modern cipher suites such as AES CHACHA20 along with SHA.

• Work with access-control-specific communication standards including OSDP for control panels and peripheral devices.

Smart Card & RFID Technologies

• Implement and support smart-card reader technologies across ISO 14443A/B ISO 15693 and related RFID standards.

• Work with DESFire architecture including AES and 3DES encryption modes application identifiers (AIDs) and file structures.

• Support legacy and proprietary card formats including MIFARE Classic HID iClass and customer-specific technologies.

Electronics & Hardware Interaction

• Read interpret and collaborate using circuit diagrams and system schematics.

• Understand power supply behaviour electrical limitations and protection considerations.

• Work with RS485 asynchronous communications Ethernet hardware NFC antenna systems relays and FET-based output drivers.

Problem Solving & Technical Leadership

• Conduct root-cause analysis across multi-component systemsboth hardware and firmware.

• Develop solutions that minimise collateral impact and maintain system stability.

• Mentor junior engineers perform code reviews and contribute to engineering best practice.

What we look for

Essential

• Ability to work in the office three days per week

• Authorization to work in the UK

• Proven experience designing firmware for embedded systems (ideally real-time / resource-constrained environments).

• Strong proficiency in C familiarity with C and JAVA is desirable.

• Experience with a range od IDEs including Keil uVision QT Creator Android Studio and source control systems including Github and TFS

• Experience with embedded Linux and Android operating systems desirable along with

• Solid understanding of hardware fundamentals and microcontroller architectures.

• Demonstrable experience with networking stacks and secure communication protocols.

• Experience with smart-card or RFID technologies is a significant advantage.

• Excellent analytical and debugging abilities including use of oscilloscopes logic analysers and protocol tools.

• Ability to work autonomously and collaboratively across multidisciplinary teams.

• Familiarity with Mitsubishi PLCs desirable.

Desirable Experience

• Experience in access control security systems or other safety-critical embedded environments.

• Previous leadership/mentoring responsibilities.

• Familiarity with compliance certification or regulated 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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