Enter a job title or keyword

Principal Software Engineer

Raytheon


Job Location:

London - UK

Salary: Not provided by the employer
Posted: 24 September 2026 (6 hours ago)
Application Deadline: 22 December 2026
Vacancies: 1 Vacancy

Job Summary

Principal Software Engineer

Location: London

Permanent

Onsite

Due to the interesting work we do and the sector this team is working in we require all candidates to hold an active eDV clearance for this role.

About us

At Raytheon UK we take immense pride in being a leader in defence and aerospace technology. As an employer we are dedicated to fuelling innovation nurturing talent and fostering a culture of excellence.

As a leading defence and aerospace company operating across the United Kingdom Raytheon UK helps to solve our customers toughest challenges. We are a major supplier to the UK government and customers around the globe providing defence solutions across all domains: land sea air space and cyberspace. We also provide digital and training transformation solutions to commercial and military customers.

With circa 2000 employees and major facilities operating throughout the UK including Broughton (Wales) Livingston and Glenrothes (Scotland) and Harlow Gloucester and Manchester (England); we are committed to investing in British careers and technology development.

Cyber

Our National Security Cyber business delivers mission-critical solutions that safeguard our national security 24 hours a day seven days a week. Working in a mature agile environment our SCRUM teams work synchronously with our customers to solve some of the toughest digital challenges faced in the world today.

Role & Responsibilities

  • Youll be part of our experienced software dev function working in a cross-functional team delivering and deploying critical software across a variety of business areas.

  • Design and build software using industry best practice

  • Collaborate with stakeholders and other engineers

  • Contribute to the completion of milestones associated with your project

  • Contribute to continuous improvement within your team

  • Collaborate with your peers on technical direction within your team

Requirements/knowledge (you dont need everything)

  • JavaScript frameworks (React NextJS)

  • TypeScript

  • Python

  • Java

  • REST API development

  • OpenAPI / Swagger

  • Cloud services (AWS or Azure)

  • Containerisation & Orchestration (Docker Kubernetes OpenShift)

  • Infrastructure as Code (Terraform Ansible)

  • Relational Databases (e.g. PostgreSQL)

  • Elasticsearch / Opensearch

  • Unit testing and automation

  • Testing frameworks (e.g. Mocha Jest Cypress)

  • Experience working in an Agile delivery team

  • Use of code repositories (e.g. GitLab); familiarity with branching strategies pull requests and merge processes

We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please do make an application and we will identify where we can best support your growth specific to your application.

Benefits:

  • : Competitive salary

  • Contributory Pension Scheme (up to 10.5% company contribution)

  • 6 times salary Life Assurance with pension

  • 25 days holiday (increasing with service) statutory public holidays plus opportunity to buy and sell up to 5 days (37hr)

  • Company bonus scheme (discretionary)

  • Flexible Benefits scheme with extensive salary sacrifice schemes including Health Cashplan Dental and Cycle to Work amongst others

  • Enhanced sick pay

  • Enhanced family friendly policies including enhanced maternity paternity & shared parental leave

Work Culture

  • 37hr working week although hours may vary depending on role job requirement or site-specific arrangements.

  • Early 1.30pm finish Friday start your weekend early!

  • Remote hybrid and site based working opportunities dependant on your needs and the requirements of the role.

  • Up to 5 paid days volunteering each year.

  • Flexible working culture focused on output with more formal flexible working arrangements on request (assessed subject to role) - please highlight any requests to the Talent Acquisition team.

RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity color religion gender sexual orientation or identity national origin age disability protected veteran status or any other characteristic protected by law.


About Company

Company Logo

We have enjoyed a close and enduring relationship with the United Arab Emirates, built on a solid foundation of Raytheon Technologies providing trusted solutions to the Emirates for national security, civil defense infrastructure and training across multiple strategic initiatives for ... View more

View Profile View Profile