Senior Software Engineer

We’re growing our Gloucester team and have several opportunities for Senior Software Engineers to work across our Defence, Cyber and Intelligence programmes.

You’ll help create and improve secure software systems and applications that safeguard digital infrastructure across the UK. You may already specialise in a particular area, or you may enjoy working across several parts of software development - either is welcome.

This is a senior role, so we’re looking for strong engineering practice, sound technical judgement and experience taking ownership of complex work. We don’t expect you to arrive knowing every technology we use; we welcome people with a passion for learning and continuous improvement.

The role

You’ll work alongside colleagues and our customers to understand complex needs and requirements, turning them into well-engineered technical solutions.

Depending on your strengths and interests, you could specialise in one area or contribute across several parts of the development lifecycle. Your work may include:

• Designing, building, testing, debugging and documenting software across its lifecycle.
• Investigating problems and improving the reliability, security and maintainability of our systems.
• Improving how software is built and delivered through infrastructure as code, CI/CD and test automation.
• Contributing your experience to technical decisions, reviews and collaborative problem-solving.
• Mentoring junior or new staff on project.

Learning and development

You’ll have access to internal training and development, education-assistance programmes and reimbursement for relevant professional memberships. We’ll help you build familiarity with our projects and technologies while giving you opportunities to deepen your existing strengths.

What we offer

Flexible working, including the option to work a four-day week with Fridays off, depending on business requirements.

Security clearance

This role requires you to be able to obtain and maintain eDV security clearance.

You don’t need to hold eDV clearance when you apply. If you don’t currently have it, we’ll support you through the application process.

Required skills, qualifications and experience

• Proven experience delivering software in a professional engineering environment.
• Confidence developing software in at least one modern language, such as Java, Python, C++, Go, Rust, JavaScript or TypeScript.
• Practical experience with Linux, Git and automated unit testing.
• The ability to work through technical trade-offs and explain your choices along the way to a mix of stakeholders.
• A collaborative approach and a dedication to continuous learning and team improvement.
• We want to hear about examples of how you’ve delivered complex software, exercised technical judgement and taken responsibility for the quality of your work.

Desired Skills:

• Cloud platforms, particularly AWS.
• Automated GitLab delivery pipelines and infrastructure as code.
• Microservices, serverless architectures and cloud migration.
• Relational and NoSQL databases, data integration and search technologies.
• Web and application frameworks such as React, Express and Next.js
• Tools including Gitlab, NiFi, Elasticsearch, Kibana, Jira and Confluence
• AI coding assistants, agentic coding and ML tooling

Experience in some of these areas is advantageous, but this is not a checklist, and we don’t expect one person to know them all. We’ll support you in learning new project-specific technologies, including opportunities to explore practical uses of AI within software development.

Professional certifications are welcome - we’d love to know what qualifications you can bring to the team - but they aren’t essential.

What we offer you

At Lockheed Martin our employees come first and therefore your physical, mental and financial wellbeing matters to us. On top of working in a highly supportive, friendly, respectful environment you can expect so much more.

We are an employer in support of and offering Flexible working with the option to also work a 4 day week depending on business requirements, where you have the option of Fridays off.

Business Environment

Lockheed Martin Rotary and Mission Systems (RMS) provides systems engineering, software development, training solutions and complex program management for global security, civil and commercial markets. Simply stated, our mission is to be the world’s leading global security and aerospace company. To achieve this mission, RMS draws on its core capabilities in advanced platforms and weapons, C4ISR, global sustainment, training and sensors.

Equal Opportunity Statement

Lockheed Martin is committed to upholding principles of equal opportunity, fostering a work environment that is aligned with our core values of integrity, respect, and exceptional performance. We recognize the importance of leveraging the unique talents and experiences of all our employees to drive innovation, deliver superior solutions, and maximize value for our customers. Our focus is on identifying the most qualified candidate for each role, regardless of their background. If you are interested in a position, we invite you to share how your skills and perspectives could bolster our team and encourage you to apply, even if you feel your qualifications do not fully meet all the job criteria outlined in our advertisement. Furthermore, Lockheed Martin is dedicated to ensuring our recruitment process is inclusive for all individuals. We are prepared to accommodate reasonable adjustments for applicants as needed. If you require assistance or adjustments to participate in the job application or interview process, please contact recruitment@global.lmco.com or call 02392 415270.