Principal Software Engineer - Defence Cyber (Onsite)

Raytheon UK; City Of London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Contributory Pension Scheme (up to 10.

Job summary

Raytheon UK is hiring a Principal Software Engineer in London. You will join a cross‑functional team delivering critical software for national security, using React/NextJS, TypeScript, Python, and Java across cloud environments.

Role requires strong API design, OpenAPI/Swagger, and containerization with Docker/Kubernetes. Experience in Agile development and GitLab workflows is expected. Flexible on-site, hybrid, or remote working arrangements available.

Qualifications

• Proficient in JavaScript frameworks (React, NextJS).
• Strong knowledge of TypeScript and Python; Java experience is beneficial.
• Experience with REST API development and OpenAPI/Swagger.
• Cloud services (AWS or Azure) and containerization platforms.
• Familiar with IaC tools like Terraform/Ansible and relational databases.
• Experience with Elasticsearch/OpenSearch and modern testing frameworks.
• Prior working in Agile delivery teams and version control (GitLab).

Responsibilities

• Be part of an experienced software dev function in cross‑functional teams.
• Design and build software using industry best practice.
• Collaborate with stakeholders and other engineers.
• Contribute to milestones and continuous improvement.
• Shape technical direction within the team.

Skills

JavaScript/React

TypeScript

Python

Java

REST API

OpenAPI/Swagger

Cloud(AWS/Azure)

Containerization

IaC(Terraform/Ansible)

PostgreSQL

Elasticsearch/OpenSearch

Unit testing

Testing frameworks(Mocha/Jest/Cypress)

Agile

GitLab/CI

Tools

Docker

Kubernetes

OpenShift

Terraform

Ansible

Job description

Raytheon UK is hiring a Principal Software Engineer in London. You will join a cross‑functional team delivering critical software for national security, using React/NextJS, TypeScript, Python, and Java across cloud environments.

Role requires strong API design, OpenAPI/Swagger, and containerization with Docker/Kubernetes. Experience in Agile development and GitLab workflows is expected. Flexible on-site, hybrid, or remote working arrangements available.