---
title: "Senior Engineer"
company: "Duffel"
company_url: "https://www.remjobs.works/companies/duffel"
url: "https://www.remjobs.works/job/duffel-senior-engineer-06864bbe-13cc-487e-ad00-3a9913c9ab1a"
apply_url: "https://jobs.ashbyhq.com/duffel/cb927b23-0b7d-4fe2-a3c5-c12a0040445d"
workplace: hybrid
location: "London, United Kingdom"
employment_type: full-time
seniority: senior
role: software-engineering
region: united-kingdom
skills: ["gcp", "kubernetes"]
date_posted: 2026-09-16T08:09:41.090Z
first_seen_by_remjobs: 2026-09-16T08:26:58.782Z
---

# Senior Engineer

**Duffel** · London, United Kingdom

Apply: https://jobs.ashbyhq.com/duffel/cb927b23-0b7d-4fe2-a3c5-c12a0040445d

## About Duffel

Any business - from travel startups to financial enterprises - can build with Duffel. Shop flights and accommodation, purchase extras, manage bookings and more.

## About the role

### Senior 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 a Senior Engineer to help shape both the product and the team building it.

#### Engineering at Duffel

We're building tools to simplify travel distribution, search, and booking through one seamless API. The technical challenge? Design a world class API, then integrate it with a vast number 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.

As a Senior Engineer, you won't just execute against a spec - you'll help define what gets built and how. You'll take on ambiguous problems, shape technical decisions across teams, and set a bar for quality that others follow.

#### You'll Thrive Here If:

✅ You've designed and shipped APIs at scale, and have a clear point of view on what makes a great one

✅ You can take a loosely-defined problem and turn it into a clear technical plan, working independently - weighing technical rigour against business impact along the way

✅ You think in systems: you can trace how a decision in one part of the stack ripples into others, and design with those knock-on effects in mind

✅ You want to keep writing production code as a senior engineer, not move away from it - this role is hands-on for the long run, not just at the start

✅ You've mentored engineers or helped them do their best work, and take real satisfaction in others reaching the bar you hold yourself to

✅ You communicate clearly, articulating what you're working on, why, and the reasoning behind your tradeoffs, in a structured way, to a variety of internal and external stakeholders.

✅ You thrive collaboratively - you believe in your methods but stay open to feedback and suggestions, and know when to stand by your approach and when to compromise

**Bonus:** Experience in travel, flights, hotels, or cars

#### What You'll Get:

💰 Competitive salary + equity (you'll own part of Duffel)

🏝️ Work from anywhere policy

🏥 Private Healthcare

🛩️ Duffel travel allowance (use what we build)

🍼 Matched Family leave

🧘‍♂️ Sabbatical programme (3 months full pay)

🪩 Office in Shoreditch + regular team socials

#### Why Now Matters

You'll work on the core API powering millions of travel bookings, with real influence over its direction. Early-stage role = outsized impact on how we build and scale, and a seat at the table for the technical decisions that will define the next phase.

---

Source: Duffel's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/duffel-senior-engineer-06864bbe-13cc-487e-ad00-3a9913c9ab1a