RTX
Senior Software Engineer

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Senior Software Engineer – Onsite – Gloucester or Manchester, United Kingdom
About the Role
At RTX, the world’s largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference in solving the world’s most complex problems. With our three market-leading businesses—Collins Aerospace, Pratt & Whitney, and Raytheon—world-class operations, and significant investments in research and development, we deliver unprecedented capabilities and opportunities.
Raytheon brings over 100 years of engineering expertise to meet today’s mission needs and stay ahead of tomorrow’s threats. We develop secure, mission-critical systems to help our nation and allies defend freedoms, deter aggression, and create a safer, more secure world.
Join us and help shape the future of aerospace and defense.
Raytheon UK has a full-time, permanent opportunity for a Senior Software Engineer to join our team on our Manchester or Gloucester sites. You’ll be part of an experienced software development function, working in a cross-functional team to design, develop, and deploy critical software across diverse business areas. Essential clearance (Ultimate Secret sets baseline benchmark) will be required, along with security vetting, including eDV clearance.
In this environment, we prove DevSecOps at scale, leveraging Artificial Intelligence, Machine Learning, cyber, and geospatial intelligence capabilities to support the defence, intelligence, and cyber sectors. Collaborating with customers and suppliers, you’ll deliver secure, mission-critical systems using the latest technologies and innovations.
Responsibilities
Responsibilities include but are not limited to:
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- Design and build sophisticated software using industry best practices
- Collaborate with stakeholders and engineers to ensure alignment and quality
- Contribute to the completion of project milestones and deadlines
- Drive continuous improvement within the team
- Collaborate with peers to determine and apply technical direction
Desired Skills and Experience
Technical Competencies:
Core Software Engineering:
- Proficient in JavaScript (React, NextJS)
- Strong understanding of TypeScript
- Python expertise
API and Frameworks:
- REST API development
- Experience with OpenAPI/Swagger
- Experience with OpenAPI/Swagger
Cloud & Infrastructure:
- Cloud service platforms (AWS or Azure)
- Containerisation & Orchestration (Docker, Kubernetes, OpenShift)
- Infrastructure as Code (Terraform, Ansible)
- Familiarity with cloud-bound environments and practices
Data & Search Technologies:
- Relational databases (e.g., PostgreSQL)
- Elasticsearch (or OpenSearch)
Testing & Quality:
- Unit testing and automation
- Familiarity with testing frameworks (e.g., Jest, Cypress)
Experience and Collaboration:
- Experience working in Agile delivery teams
- Use and familiarity with code repositories (e.g., GitLab)
- Experience with branching strategies, pull requests, and merging
Location and Role Requirements
Classification of Role:
-
This position is classified as Onsite.
-
Onsite Roles: Employees will work primarily onsite. This includes all production and maintenance employees, who are essential to the development of RTX’s products. Commuting to and from the assigned site is the employee’s personal responsibility.


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- For clarity during recruitment, role types, and site commitments will be further communicated later in the recruiting process.
Qualification Criteria:
Requires advanced knowledge of work area typically obtained through one of the following:
- A University Degree (or equivalent experience) combined with at least 5 years of prior relevant experience, or
- An Advanced Degree in a related field with minimum 3 years of experience
Relevant degree fields typically include Engineering/Technical Positions requiring degree in Science, Technology, Engineering, or Mathematics (STEM) combined with 5 years of minimum relevant experience (unless prohibited by local laws/regulations).
About RTX
RTX is a leading aerospace and defense company delivering advanced systems and services for the commercial, military, and government markets. With three industry-leading businesses—Collins Aerospace, Pratt & Whitney, and Raytheon— объединствующие 140,000 employees, RTX operates at the edge of known science. Our team focuses on innovations in quantum physics, electric propulsion, hyperspeed, avionics, and cybersecurity. Based in Arlington, Virginia, the company was established in 2020 through the combination of Raytheon Company and United Technologies Corporation aerospace segments.
Employment Principles
RTX adheres to a policy of equal employment opportunities. Applications are considered 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.
See RTX’s Privacy Policy and Terms [here].
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