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Senior Software Engineer, K4B

Kayak


Job Location:

Concord, CA - USA

Monthly Salary: Not provided by the employer
Posted: 9 August 2026 (30+ days ago)
Application Deadline: 6 November 2026
Vacancies: 1 Vacancy

Job Summary

KAYAK part of Booking Holdings (NASDAQ: BKNG) is the worlds leading travel search engine. With billions of queries across our platforms we help people find their perfect flight stay rental car and vacation package. Were 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 are looking for a strong Senior Java Software Engineer to implement new features and maintain KAYAKs world-leading platform. We are seeking for people who love working with data - parsing analyzing investigating interpreting modeling and extracting knowledge from large volumes of data. Good candidates will have a passion in processing data to help drive better business decisions or to develop new features in a fast-paced environment where many small and diverse projects are the norm.

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

In this role you will:
  • Extract data from databases write scripts to parse clean combine and process them

  • Communicate with APIs via REST or SOAP interfaces.

  • Configure enterprise applications for large customers.

  • Develop tools to assist in the debugging of existing products.

  • Build and maintain high-performance integrations with third-party APIs (airlines hotel and rentalcars providers)

  • Take full ownership of your designs: from initial concept to deployment while maintaining high standards for code quality and performance

  • Participate in code reviews and architectural steering to ensure the K4B project remains modular and reusable as KAYAK expands its enterprise footprint

Please apply if you have:
  • 6-8 years of experience with Java programming

  • Strong understanding of programming fundamentals data structures algorithms and software design

  • Ability to work independently and with a team

  • Good communication skills for sharing ideas clearly with both technical and non-technical colleagues

  • Experience with relational databases like MySQL or Oracle

  • Prior experience in the travel domain is beneficial

  • Experience with B2B systems or identity/HR integrations is beneficial e.g. SCIM SAML/OAuth SSO user provisioning/deprovisioning and connecting HRIS/IDP platforms (Workday Okta Active Directory) to product services.

  • Experience with the following:

    • Unix shell scripting

    • Spring & Mybatis frameworks

    • DOM and using XPath JQuery & CSS

    • API development using REST Web Service SOAP etc

    • Machine Learning

Benefits and Perks
  • Work from (almost) anywhere for up to 20 days per year

  • Focus on mental health and well-being:

    • Company-paid therapy sessions through SpringHealth

    • Company-paid subscription to HeadSpace

    • Company-wide week off a year - the whole team fully recharges (and returns without a pile-up of work!)

    • No meeting Fridays

  • Paid parental leave

  • Generous paid vacation time off for your birthday

  • Paid volunteer time

  • Focus on your career growth:

    • Development Dollars

    • Leadership development

    • Access to thousand of on-demand e-learnings

  • Travel Discounts

  • Employee Resource Groups

  • Competitive retirement and health plans

  • Free lunch 2 days per week

  • Fun quarterly events such as boat trips arcades ski trips Thursday socials and more

There are a variety of factors that go into determining a salary range including but not limited to external market benchmark data geographic location and years of experience sought/required. The range for this Massachusetts based role is $00 not inclusive of annual bonus and recurring RSU grants.

We offer a competitive base salary and benefits including: health benefits; flexible spending account; retirement benefits; life insurance; paid time off (including PTO paid sick leave medical leave bereavement leave floating holidays and paid holidays); and parental leave benefits.

Inclusion

At KAYAK we want everyone to have the space to grow share ideas and do great work. Thats why were focused on hiring the best talent from all walks of life and experiences supporting them well and making sure no one feels like they have to fit a mold to belong here.

Need any adjustments for the interview application or on the job No problem - just give us a heads-up. Weve got you.

#LI-AS1


Required Experience:

Senior IC


About Company

Company Logo

KAYAK searches hundreds of other travel sites at once to find the information you need to make the right decisions on flights, hotels & rental cars.

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