Title
Senior Embedded Software Developer
Location
Commutable to Hertfordshire, Cheltenham, and Bristol. Mostly on-site: 4 days per week at customer site, 1 day remote where appropriate.
Clearance
Must be eligible and willing to undergo DV clearance (British Citizen, UK residency last 10 years).
Responsibilities
* Lead development of bespoke embedded solutions across multiple 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/robustness constraints.
* Lead debugging, testing and optimisation across lab and field environments.
* Shape requirements with stakeholders, propose approaches 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.
Qualifications
* Extensive hands‑on embedded software development experience.
* Strong proficiency in C/C++ (and/or Python where appropriate).
* Deep experience with embedded systems (ESP32, ARM Cortex, SBCs).
* Strong understanding of low‑level interfacing (UART, GPIO, USB, SPI/I2C).
* Confident in Linux‑based development environments and toolchains.
* Strong debugging skills (JTAG/SWD, logic analysers, profiling, etc.) and disciplined engineering practice.
* Ability to communicate clearly and influence technical decisions across teams.
Desirable Skills
* Experience delivering in secure/defence environments.
* Knowledge of cryptography, secure transport, or secure system design.
* Wireless experience (Bluetooth, UWB, Wi‑Fi).
* USB device drivers / advanced USB communication.
* RTOS / bare‑metal expertise.
* Embedded Rust experience or strong interest.
Education & Qualifications
* Degree in a relevant discipline preferred (or equivalent experience).
* Professional membership (BCS, IET) is a plus.
Clearance Requirements
* Clearance to start: SC
* Clearance for role: DV
Benefits
* Contributory Pension Scheme
* Private Medical Insurance
* 33 days Annual Leave (including public and privilege holidays)
* Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)
* Flexi‑Time
Pay Range
£61,500.00 - £78,800.00
Equal Employment Opportunity Statement
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
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