Senior Embedded Software Engineer

L3Harris Technologies Inc; Tewkesbury; Hybrid; GBP 100,000 - GBP 125,000; Full time

Job summary

A leading technology company in Tewkesbury is seeking a Senior Embedded Software Engineer with strong C++ proficiency to develop innovative software solutions. Responsibilities include collaborating with cross-functional teams, adhering to coding standards, and mentoring junior engineers. This position promotes flexible work arrangements and offers a comprehensive benefits package, including a relocation bonus and professional membership reimbursement.

Benefits

Flexible or part-time working arrangements

Relocation support

£3,000 to £6,000 DV Bonus

25 days holiday per year

Private medical insurance

Pension scheme with employer contribution

Life Assurance up to 10x salary

Group income protection

Employee Family Assistance Program

Professional membership reimbursement

Qualifications

• Proficiency in C++ for embedded software development.
• Experience with other languages such as Python, C#, Rust, and C.
• Strong communication and documentation skills.

Responsibilities

• Develop complex software systems as an individual contributor.
• Define functional and non-functional requirements.
• Support coding standards and continuous improvement.
• Provide mentorship to software engineers.

Skills

C++

Python

C#

Rust

C

Version Control Systems (Git/GitLab)

Object-Oriented Design

Agile Methodologies

Jira

Confluence

Education

Degree in Computer Science, Software Engineering, or related field

Job description

Job Title – Senior Embedded Software Engineer

Tewkesbury, UK

Flexible or part‑time working arrangements considered upon request.

Relocation support available - discussed upon application.

Job ID – 33391

About this opportunity and L3Harris UK

From 11 UK sites, our team of nearly 1,000 people delivers unique capabilities across space, air, land, sea and cyber for military, security and commercial customers across the UK and worldwide.

L3Harris in Tewkesbury is our HQ for our Intelligence & Cyber International division. In the land domain, our T7 and T4 multi‑mission robots deliver next‑generation remote capabilities and uncompromised performance. We design and manufacture world‑leading land force protection systems, cyber and electromagnetic activities (CEMA), electronic warfare (EW) and encryption capabilities. Our cyber capabilities provide an information advantage in the fields of kinetic conflict, cyber warfare, force protection and counterterrorism.

We are seeking mid‑level to experienced Software Engineers with a passion for software engineering and a proven track record of technical excellence to design and develop innovative, cutting‑edge systems. This role offers the opportunity to be a hands‑on Software Engineer helping to create software solutions that prioritise performance, reliability, and scalability.

Let us know if you are passionate about this role and would like to apply even if you don't meet every requirement. We value growth and are open to potential.

Employee benefits

• Flexible or part‑time working arrangements considered upon request.
• Relocation support available - discussed upon application.
• £3,000 to £6,000 DV Bonus – not essential for this role. Bonus subject to clearance and project requirements – discussed upon application.
• Half day finish on a Friday
• 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 health care cash plan, dental insurance, gym membership, critical illness cover, cycle to work scheme and electric vehicle 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:

• Applying your software skills as an individual contributor to help develop complex software systems;
• Collaborating with cross‑functional teams to define functional and non‑functional requirements for embedded and/or user interface software projects;
• Creation of low‑level designs, implementation and test solutions, in line with the defined architecture;
• Supporting and promoting adherence to coding standards, best practices, planning documentation, procedures for software development and delivery, and continuous improvement initiatives;
• Providing guidance and mentorship to software engineers;
• Meeting cost and schedule targets while contributing to technical reviews, bids & proposals, budget & schedule discussions, customer engagement activities

What you’ll bring

• Proficiency in C++, specifically embedded software development using C++;
• Experience of other languages such as Python, C#, Rust, C;
• Experience of using version control systems (e.g. Git / GitLab or similar);
• Strong object‑oriented design and programming skills (OOD, OOP);
• Familiarity with development methodologies (e.g. V‑model, Waterfall, Agile);
• Proficiency with tools like Jira, Confluence, Mantis;
• A proven track record of delivering reliable, maintainable software across the lifecycle, including peer review;
• Strong communication, documentation and organisational skills;
• A degree (or equivalent experience) in Computer Science, Software Engineering, or a related field.

Important to know

Due to the nature of our work many of 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.

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.