Principal Software Engineer

Salary: £100,000 - 130,000 per year

Requirements:

• We need a Software Engineer with strong experience in one or more of the following areas: backend development with Java Spring Boot, Maven, or Python; frontend development with JavaScript/TypeScript, React, or npm.
• We are looking for proven experience designing, developing, and deploying scalable backend systems.
• We value familiarity with DevOps, CI/CD, and containerisation technologies such as Jenkins, Kubernetes, Docker, and AWS.
• We need strong communication, collaboration, and problem-solving skills, ideally within an agile environment.
• You must be a British National for this clearance type.
• You must currently hold the Highest Level of UK Government security clearance.

Responsibilities:

• We take ownership of multiple teams deliverables and work with technical leads to define a path that meets customer requirements.
• We act as the prime technical contact for our area.
• We collaborate with senior external partners and customers, often coordinating between organisations.
• We mentor and guide engineers to support skills development and overall team growth.
• We contribute to high-quality technical design, development, and delivery planning.

Technologies:

• AWS
• Backend
• CI/CD
• DevOps
• Docker
• Frontend
• Support
• Java
• JavaScript
• Jenkins
• Kubernetes
• Maven
• NPM
• Python
• React
• Security
• Spring
• Spring Boot
• TypeScript
• Cloud

More:

We are Northrop Grumman UK, where we define possible by driving innovation and solving tomorrows challenges. This is a full-time Principal Software Engineer role based in London, United Kingdom, with travel required around 10% of the time. Relocation assistance may be available, and the salary range is 80,200 to 120,400. We offer flexible working options, including an optional compressed fortnight, private healthcare, a cash health plan, a holiday buy/sell scheme, career development programmes, ongoing specialist training, performance-based bonuses, and a range of wellbeing, financial, and lifestyle benefits. We are committed to building a secure and connected world, and we foster an inclusive culture where every voice matters and our people can grow, belong, and thrive.

last updated 36 week of 2026