Principal Software Engineer

globalhr; Bradley Stoke; Hybrid; CAD 169,000 - 245,000; Full time

Benefits offered by this job

Competitive salary

Pension scheme

Life Assurance

Holiday entitlement

Company bonus

Flexible benefits

Enhanced sick pay

Family-friendly policies

Volunteer days

Job summary

Raytheon UK is seeking a Principal Software Engineer to design and build software at Gloucester, with onsite/hybrid work (min 3 days on site). The role requires eligibility for SC and eDV clearance and involves leading technical direction within a SCRUM team.

The position covers Cyber projects across UK facilities and offers a competitive salary and benefits package, with early Fridays and flexible working options depending on role and site.

Qualifications

• Core software engineering with JavaScript/TypeScript/Python or Java.
• REST API development using OpenAPI/Swagger.
• Cloud services experience (AWS or Azure).
• Containerisation and orchestration (Docker, Kubernetes, OpenShift).
• Infrastructure as Code experience (Terraform, Ansible).
• Relational databases (PostgreSQL).
• Elasticsearch/OpenSearch experience.
• Unit testing/automation (Mocha, Jest, Cypress).
• Experience in an Agile delivery team.

Responsibilities

• 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

Skills

React/NextJS (JS frameworks)

TypeScript

Python

Java

REST API development

OpenAPI/Swagger

PostgreSQL

Elasticsearch/OpenSearch

Unit testing (Mocha/Jest/Cypress)

Agile delivery

Tools

Docker

Kubernetes

OpenShift

Terraform

Ansible

AWS

Azure

Job description

Date Posted: 2026-08-13

Country: United Kingdom

Location: Gloucester, South Gloucestershire

Position Role Type: Onsite

Principal Software Engineer

Location: Gloucester

Permanent

Onsite/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 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

• 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

Required experience

• Core Software Engineering such as: JavaScript frameworks (React, NextJS), TypeScript, Python or 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

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.

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