Principal Software Engineer

Job ID: 01854473Posted: Posted YesterdayStart Date: 2026-08-13Location: Manchester, LancashireCountry: United KingdomTime Type: Full timeDate Posted:2026-08-13 Country:United Kingdom Location:Manchester, Lancashire Position Role Type:OnsitePrincipal Software EngineerLocation: ManchesterPermanentOnsite/Hybrid (min 3 days a week on site)Due to the interesting work we do and the sector this team is working in, we require all candidates to be willing and eligible to hold SC and eDV clearance.About usAt 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.CyberOur 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 & ResponsibilitiesDesign and build software using industry best practiceCollaborate with stakeholders and other engineersContribute to the completion of milestones associated with your projectContribute to continuous improvement within your teamCollaborate with your peers on technical direction within your teamRequired experienceCore Software Engineering such as: JavaScript frameworks (React, NextJS), TypeScript, Python or JavaREST API development / OpenAPI / SwaggerCloud services (AWS or Azure)Containerisation & Orchestration (Docker, Kubernetes, OpenShift)Infrastructure as Code (Terraform, Ansible)Relational Databases (e.g. PostgreSQL)Elasticsearch / OpensearchUnit testing and automation / Testing frameworks (e.g. Mocha, Jest, Cypress)Experience working in an Agile delivery teamWe 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 salaryContributory Pension Scheme (up to 10.5% company contribution)6 times salary ‘Life Assurance’ with pension25 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 othersEnhanced sick payEnhanced family friendly policies including enhanced maternity, paternity & shared parental leaveWork Culture37hr 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.#LI-KP1RTX 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. Privacy Policy and Terms:Click on this link to read the Policy and Terms