Senior Software Developer

Location

Commutable to Hertfordshire, Cheltenham, and Bristol – mostly on‑site (4 days/week on customer site, 1 day remote where appropriate)

Security Clearance

Must be eligible and willing to undergo DV clearance (British Citizen, UK residency last 10 years)

Role

Senior Embedded Software Engineer – leading embedded software development for national security and defence operations.

Key Responsibilities

• Lead development of bespoke embedded solutions across ESP32, Raspberry Pi, and ARM platforms.
• Design, implement, and maintain production‑quality C, C++, and/or Python code interfacing with hardware.
• Architect solutions involving communication protocols, peripheral integration and performance constraints.
• Lead debugging, testing, and optimisation across lab and field environments.
• Shape requirements with stakeholders and influence delivery plans.
• Support integration, configuration and deployment into secure operational environments.
• Produce high‑quality documentation and enforce consistent Git workflows and review standards.
• Mentor junior engineers and raise team capability through coaching and knowledge sharing.

Required Skills and Experience

• Extensive hands‑on embedded software development experience.
• Strong proficiency in C/C++ with or without Python where appropriate.
• Deep experience with embedded systems, including ESP32, ARM Cortex and SBCs.
• Strong understanding of low‑level interfacing such as UART, GPIO, USB, SPI/I²C.
• Confident in Linux‑based development environments and toolchains.
• Strong debugging skills (JTAG/SWD, logic analyzers, profiling etc.) and disciplined engineering practice.
• Ability to communicate clearly and influence technical decisions across teams.

Desirable

• Experience delivering in secure/defence environments.
• Knowledge of cryptography, secure transport or secure system design.
• Wireless experience (Bluetooth, UWB, Wi‑Fi).
• USB device driver or advanced USB communications.
• RTOS / bare‑metal expertise.
• Embedded Rust experience or strong interest.

Qualifications

• Degree in a relevant discipline preferred or equivalent experience.
• Professional membership (BCS, IET) is a plus.

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