Senior Embedded Software Developer – Defence & Security

About the role

We are looking for a senior embedded software engineer to design and deliver mission‑critical tooling for national security and defence customers. The role combines hands‑on development with technical leadership, working on ESP32, Raspberry Pi and ARM platforms.

Key responsibilities

• Lead development of bespoke embedded solutions across multiple hardware platforms.
• Design, implement and maintain production‑grade C, C++ and/or Python code that interfaces with peripherals.
• Architect communication protocols, peripheral integration and performance‑critical features.
• Drive debugging, testing and optimisation in both lab and field environments.
• Shape requirements with stakeholders and influence delivery plans.
• Support integration, configuration and secure deployment of solutions.
• Produce high‑quality documentation and enforce consistent Git workflows.
• Mentor junior engineers and raise overall team capability.

Required profile

• Extensive hands‑on embedded software development experience.
• Strong proficiency in C/C++ (and Python where appropriate).
• Deep experience with ESP32, ARM Cortex and single‑board computers.
• Solid understanding of low‑level interfaces such as UART, GPIO, USB, SPI and I²C.
• Confidence in Linux‑based development environments and toolchains.
• Advanced debugging skills (JTAG/SWD, logic analysers, profiling).
• Clear communication and ability to influence technical decisions.
• Eligibility for DV security clearance (British citizen, 10‑year UK residency).

Required skills

• C
• C++
• Python
• ESP32
• ARM Cortex
• Raspberry Pi
• SBC
• UART
• GPIO
• USB
• SPI
• I2C
• Linux
• Git
• JTAG
• SWD
• Logic analyser
• Profiling
• Bluetooth
• UWB
• Wi‑Fi
• RTOS
• Bare‑metal
• Embedded Rust
• Cryptography

What we offer

• Collaborative culture focused on customer success.
• Opportunities to work on high‑impact defence projects.
• Professional development, mentorship and knowledge‑sharing.
• Supportive team environment with flexible hybrid working.