A UK-based technology-led aviation company is hiring a Principal Software Engineer to own both airborne software architecture and AWS cloud infrastructure, including end-to-end cybersecurity aligned to Secure by Design principles.

This is a hands-on role building high-quality, mission-critical software in a highly regulated environment. You'll take ownership from design through to delivery and support, contribute to team standards, and grow your technical influence while solving genuinely complex, real-world problems.

What you'll be doingDesigning, building, and maintaining scalable applications using Python and React. Developing Progressive Web Apps with React, Flask, and Python backends. Building and integrating REST APIs and contributing to event-driven, microservices-based systems. Troubleshooting across business and aviation systems and owning resolution. Applying resilience patterns, observability, and secure development practices, and deploying through CI/CD pipelines.

• What we're looking forA proven track record owning software delivery from inception to production. Strong skills in Python, JavaScript (React), Docker, and AWS (EC2, Lambda, CloudWatch). Working knowledge of relational and NoSQL databases (PostgreSQL, MongoDB, DynamoDB). Solid grounding in software engineering fundamentals, Linux environments, Git workflows, and automated testing. Experience with SDLC and traceability approaches (Agile, V-model, DOORS).