Senior JAVA Software Engineer

KAYAK, part of Booking Holdings (NASDAQ: BKNG), is a leading travel search engine. With billions of queries across our platforms, we help people find their perfect flight, stay, rental car and vacation package. We’re also transforming business travel with a new corporate travel solution, KAYAK for Business.

As an employee of KAYAK, you will be part of a travel company that operates a portfolio of global metasearch brands including momondo, Cheapflights and HotelsCombined, among others. From start-up to industry leader, innovation is in our DNA and every employee has an opportunity to make their mark. Our focus is on building the best travel search engine to make it easier for everyone to experience the world.

We’re hiring Java Backend Engineers to help improve and maintain KAYAK’s search and booking systems. If you care about travel and building helpful, reliable user experiences, we’d love to hear from you.

This role will be required to work from our Cambridge/Concord, MA office at least 3 days per week.

IN THIS ROLE, YOU WILL:

- Build and maintain backend features for the Stays team (search, booking, integrations).

- Improve performance, reliability, and user experience of existing systems.

- Integrate and maintain connections with internal and third-party APIs.

- Collaborate with frontend engineers, product, design, and QA to deliver features

PLEASE APPLY IF YOU HAVE:

- Strong Java development skills.

- Experience designing APIs and backend services.

- Experience building high-performance, scalable services.

- Familiarity with relational databases (e.g., MySQL) and web data formats/protocols (HTTP, XML, JSON).

- Practical experience with APIs (design, consumption, or integration).

- Clear communicator who works well on a team.

- Self-driven and able to move projects forward independently.

Nice to have

- Experience with Spring, Git, Redis, Kafka, or similar technologies.

- Experience working on search, booking, or high-throughput ...