This opportunity is ideally suited to an experienced embedded software engineer with a strong foundation in digital signal processing and radio communications, capable of contributing across the full lifecycle of tactical communications systems—from early-stage research and waveform design through to deployment, sustainment, and capability enhancement of in-service products.
The successful candidate will demonstrate deep knowledge of real-time embedded software development in communications systems, including experience with DSP algorithms, waveform implementation, and Software Defined Radio (SDR) architectures. They will also possess a solid understanding of modern software engineering practices and be comfortable working at the intersection of software, hardware, and RF domains.
Working within a small, highly collaborative engineering team, the individual will engage with software, systems, and hardware engineers to develop robust, high-performance communications solutions. Once established in the role, they will operate with a high degree of autonomy while receiving strategic guidance from Engineering Management.
Strong written and verbal communication skills are essential, including the ability to clearly articulate complex concepts such as modulation schemes, signal processing pipelines, and radio system behaviour to both technical and non-technical stakeholders.
A few of our employee benefits are
Half day finish on a Friday or 9/80 working schedule available
25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days
Private medical insurance with optional family cover
Pension scheme of up to 8% employer contribution
Life Assurance 4x salary (flexible up to 10x)
Group income protection
Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover, cycle to work scheme, travel insurance and electric car scheme
Employee Family Assistance Program providing mental health and wellbeing support
Professional membership reimbursement (discretionary)
What the role will involve
The responsibilities of your role will include the following
Maintenance and enhancement of embedded software for existing tactical radio and communications systems, including feature development aligned to evolving operational requirements.
Design and implementation of real-time embedded software for radio waveforms, including modulation/demodulation, filtering, synchronisation, and error correction techniques.
Development and optimisation of DSP algorithms for performance-critical applications such as signal detection, channel estimation, and interference mitigation.
Implementation of software within Software Defined Radio (SDR) platforms, including integration with RF front-end hardware.
Design and development of application-level tools for modelling, simulation, analysis, and test of communication systems.
Translation of high-level system requirements into detailed software architectures and signal processing designs.
Production of high-quality technical documentation, including design specifications and algorithm descriptions.
Maintenance and evolution of software development and test environments, including signal analysis and debugging tools.
What you’ll bring
The role requires the following experience and skills
Bachelor’s or Master’s degree in Software Engineering, Electronic Engineering, Communications Engineering, or a related discipline
Minimum of 7 to 10 years’ experience in a prior related role.
Strong knowledge of digital signal processing (DSP) concepts and implementation (e.g., filtering, FFTs, modulation schemes, coding techniques)
Proficiency in C/C++ for embedded systems, with additional experience in C# and/or Python for tooling, simulation, or analysis
Experience with real-time embedded systems and performance-constrained environments
Familiarity with modelling, simulation, and analysis tools (e.g., MATLAB/Simulink) for DSP and communications system design
Experience with MBSE, UML, and system/software design tools (e.g., IBM Rhapsody, DOORS)
Excellent communication skills, with the ability to convey complex signal processing and radio system concepts clearly
Strong organisational and problem-solving skills
Proficiency with Microsoft Office and engineering tools (e.g., MS Project, SharePoint, Jira)
Important to know
Due to the nature of our work many our roles require a UK nationality and the ability to obtain a security clearance. Applicants who accept a conditional offer of employment must meet the requirement of right to work in the UK and must meet eligibility requirements for access to classified information and will be subject to government security checks.
#LeadSoftwareEngineer
#LI-RT1
L3Harris Technologies is proud to be an Equal Opportunity Employer. We are committed to maintaining a workplace that is free from unlawful discrimination and offers equal opportunities for all. Applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief, and marriage and civil partnerships.
