Software Engineer (Backend)

Duffel; Greater London; Hybrid; GBP 50,000 - 80,000; Full time

Benefits offered by this job

Competitive salary + equity

Work from anywhere policy

Duffel travel allowance

Matched parental leave

Sabbatical programme

Visa sponsorship available

Office in Shoreditch + team socials

Job summary

Duffel is hiring a Software Engineer to join their team in London. This role is focused on building tools for travel distribution and booking through a seamless API. You will work on the core API that powers millions of travel bookings, ensuring high standards in design and developer experience.

This position offers a competitive salary, equity, and several benefits, including a work-from-anywhere policy and matched parental leave. Join us to make an impact in the travel industry!

Qualifications

• Passionate about designing beautiful APIs and creating great developer experiences.
• High bar for code quality and API design.
• Opinionated about good engineering standards and processes.
• Think big picture – making trade‑offs between technical work and business impact.
• Communicate clearly, articulating what you’re working on.
• Collaborate well – open to feedback and suggestions.

Responsibilities

• Work on the core API powering millions of travel bookings.
• Design beautiful APIs and create great developer experiences.
• Define engineering standards and processes.
• Build integration solutions with travel providers.

Skills

API design

Code quality

Collaboration

Tools

Elixir

Phoenix

Kubernetes

Google Cloud Platform

Job description

Software Engineer

London | Full-time | Hybrid | Shoreditch/Liverpool Street

Create the Future of Travel With Us

Whether it's visiting the people closest to us, starting an exciting adventure, or a career-defining business trip, travel is essential. Yet we've all experienced the aches and pains of getting to our destination.

More than 4 billion airline passengers rely on technology that hasn't kept up with modern expectations. That's why we're rebuilding the infrastructure that underpins the travel industry - simplifying systems and building tools that will make the future of travel effortless.

We were part of Y Combinator S18's cohort and we're backed by Benchmark, Blossom, Index Ventures, and Kima Ventures - a fantastic set of investors that has helped build some of the world's largest companies.

Our London team is growing, and we're looking for talented people to join us on our journey.

Engineering at Duffel

We're building tools to simplify travel distribution, search, and booking through one seamless API. The technical challenge? Design a beautiful API, then integrate it with hundreds of travel providers - each with different systems and requirements - whilst delivering a fantastic developer experience.

We work with Elixir, Phoenix, Kubernetes, and Google Cloud Platform, but we value strong engineering fundamentals over specific tech experience.

Responsibilities

Work on the core API powering millions of travel bookings, designing beautiful APIs and creating great developer experiences. Define engineering standards and processes, and build integration solutions with hundreds of travel providers.

Qualifications

• Passionate about designing beautiful APIs and creating great developer experiences
• High bar for code quality and API design
• Opinionated about good engineering standards and processes, as we define ours at Duffel
• Think big picture – making trade‑offs between technical work and business impact
• Communicate clearly, articulating what you’re working on and why in a structured way
• Collaborate well – believe in your methods but stay open to feedback and suggestions

Bonus

Experience in travel, flights, hotels, or cars.

Benefits

• Competitive salary + equity (you’ll own part of Duffel)
• Work from anywhere policy
• Duffel travel allowance (use what we build)
• Matched parental leave
• Sabbatical programme (3 months full pay)
• Visa sponsorship available
• Office in Shoreditch + regular team socials

Why Now Matters

You’ll work on the core API powering millions of travel bookings. Early‑stage role = outsized impact on how we build and scale.