Software Engineer (London Hub) in Westminster

At Katanox, we are building travel's growth engine. We provide financial and distribution infrastructure for the hospitality industry so accommodation suppliers and travel buyers can manage payments, reconciliation, direct contracting, and connectivity on one unified platform.

Our purpose is to remove the complexity and fragmentation of hospitality by bringing multiple business operations for hotels and travel buyers together into a single workflow, from bookings to payments. We are headquartered in Amsterdam with hubs in London and New York, and are a fast‐growing, well‐funded company building the next generation of infrastructure for hospitality.

A cornerstone of our culture is in‐person collaboration. We follow a "hub" model with unique hubs in Amsterdam, London, and New York, where we regularly collaborate face‐to‐face, onboard customers and colleagues, hold design sessions, and host events. We do not hire for strictly remote roles. We expect people to spend meaningful time in our hubs because this is how we maintain our culture, build trust, and move quickly together.

As a financially regulated company, we are held to exceptionally high compliance standards. This demands a rigorous approach to collaboration, security, and decision‐making.

Our values:

• Team over the individual, no ego: We put the success of the whole team ahead of individual agendas. We win together, share credit, and leave egos at the door.
• Data beats excitement: We welcome bold ideas, but we commit based on evidence. We use data, experimentation, and clear hypotheses to decide what to build.
• Dare to do: We are proactive, take smart risks, and move from talking to doing. We learn by shipping and improve through iteration.
• See it, own it, and close it: When we spot a problem or opportunity, we take responsibility to drive it to completion instead of assuming someone else will.
• We apply radical candor: We care personally and challenge directly. We give and receive honest feedback so we can grow faster as individuals and as a team.
• In person first, call second: We prioritise in‐person collaboration in our hubs to build trust, move quickly, and solve hard problems together.
• Build collaboratively: We actively involve the right people, share context early, and co‐create solutions across teams and disciplines.
• Iterate fast and pragmatically: We ship small, learn quickly, and avoid over‐engineering. We focus on solutions that work in reality, not just in theory.

About the role:

We are looking for a Software Engineer to help us build and scale the platform that powers travel's growth engine. You will work closely with product, design, and other engineers to ship high‐impact features across our financial and distribution products, and to improve the reliability, performance, and security of our platform.

What you will work on:

• Design, build, and maintain core services and user‐facing features.
• Collaborate with product managers and designers to understand customer problems and translate them into technical solutions.
• Improve performance, reliability, and observability of our systems as we scale across multiple markets.
• Contribute to technical design discussions and help evolve our architecture in a regulated, high‐compliance environment.
• Help maintain a high bar on engineering quality through code reviews, testing, and documentation.

What we are looking for:

• Solid experience in Kotlin/Java.
• Experience in software engineering, building and maintaining production systems.
• Ability to turn complex, ambiguous problems into simple and robust solutions.
• You are able to write well defined unit/integration tests.
• You have high sense of quality code and community best practices.
• You understand data structures, algorithms and software design.
• Fluency in English.

Why join Katanox:

• Real impact on a complex industry: You will help reshape how hotels and travel buyers work together by removing fragmentation and complexity in distribution and payments.
• High‐trust, collaborative culture: You will join a team that values in‐person collaboration, clear communication, and accountability, while still supporting flexibility in how you do your best work.
• Growth stage environment: We are growing fast, providing the opportunity to take significant ownership and see your work directly influence product and business outcomes.
• International hubs: Work with colleagues and partners across Amsterdam, London, and New York, and be part of a truly international company.

Do you want to join our team as our new Software Engineer? Then we'd love to hear about you!