Principal Software Engineer

Overview

As a Software Engineer in Raytheon UK, you will contribute to delivering secure, mission-critical software across cross-functional teams. You will work on DevSecOps at scale, AI/ML, cyber, and geospatial intelligence to support defence and intelligence missions. The role blends hands-on development with collaboration, continuous improvement, and alignment with customer needs. This is an onsite role at Gloucester or Manchester, with a clear impact on critical systems and innovative technologies.

Responsibilities

• Design and build software using industry best practices
• Collaborate with stakeholders and other engineers
• Contribute to milestones and project progress
• Drive continuous improvement within the team
• Shape technical direction through peer collaboration

Key requirements

• Core Software Engineering
• JavaScript frameworks (React, NextJS)
• TypeScript
• Python
• REST API development
• OpenAPI / Swagger
• Cloud services (AWS or Azure)
• Containerisation & Orchestration (Docker, Kubernetes, OpenShift)
• Infrastructure as Code (Terraform, Ansible)
• Relational databases (PostgreSQL)
• Elasticsearch / Opensearch
• Unit testing and automation
• Testing frameworks (Mocha, Jest, Cypress)
• Experience in Agile delivery
• GitLab usage with branching and PRs

• Collaboration
• Stakeholder communication
• Teamwork
• React
• NextJS
• TypeScript