Full Stack Developer jobs in United Kingdom

Job summary

A travel technology firm is seeking a Senior Software Engineer in London (UK) for 2026. This role offers a hybrid working model and supports skilled worker visa sponsorship for qualified international candidates. The ideal candidate will design and maintain scalable APIs and backend systems, enhancing performance and reliability. Duffel provides a fast-paced environment with opportunities for career growth and influence over technical standards in the travel industry.

Qualifications

• Strong experience as a Software Engineer working on backend or platform systems.
• Proven ability to design and maintain APIs and distributed systems.
• Excellent software engineering fundamentals and code quality standards.
• Experience working with cloud infrastructure and modern deployment practices.
• Strong communication skills and ability to work in collaborative product teams.
• Product-minded approach balancing technical and business priorities.

Responsibilities

• Design, build, and maintain scalable APIs for global travel.
• Develop robust backend systems integrating with external travel providers.
• Improve reliability and performance of Duffel's core platform.
• Contribute to architectural decisions and long-term technical strategy.
• Write high-quality, maintainable, and well-tested production code.
• Collaborate closely with product and design teams.