KAYAK is looking for an expert backend developer who will be able to develop, build, and modify the computer applications that support the KAYAK platform ad network. As a software engineer on the KAYAK Adtech team, you will use your skills to build applications that our partners will use to create ad content, manage targeting and bids on their ads. You will also work with different data systems, write ETLs and gather data that will support building reports and dashboards that provide insights into how the ads perform and help our partners improve the ROI of their ads. Your day to day will involve writing a lot of code from building APIs, designing databases, writing algorithms to support analytics, improving performance by solving scale problems in the application. The role presents a unique opportunity to work with a geographically distributed team and working with different teams across the organization and company. 

In this role you will: 

  • Backend development of KAYAK ad network software applications, including ad targeting, bidding, content management, and other adjacent sub-systems
  • Individual and team-based design and development of new features and products related to the KAYAK ad network
  • Utilizing and developing against various  types of data storage systems that support our ad network, including but not limited to MySQL, memcache, Hive/Hadoop, Aerospike, Snowflake and Redis storage systems.
  • Identifying and resolving complex software problems related to the KAYAK ad network
  • Analyzing and resolving scalability issues within the KAYAK ad network software applications
  • Being an active participant in the ongoing maintenance and improvement of existing ad network services and feature-sets 

Please apply if you have:

  • 5+ years Java experience, experience with Java web development a plus
  • Great programming fundamentals
  • Solid understanding of SQL. Hive/Hadoop, Aerospike, Redis is a plus
  • Some front end development experience preferred, but not required

And if you are:

  • A strong team player with attention to detail
  • Someone who can prioritize multiple  requests with frequent interruptions and handle their own work while taking infrastructure and business needs into account
  • Must have excellent technical communication skills

Benefits and Perks

  • Fully remote work possibility;
  • Lunch twice a week;
  • Opportunities to work in any KAYAK office around the globe;
  • Flexible working hours;
  • Day off on your birthday;
  • Regular team events/excursions;
  • Additional paid paternity leave;
  • Generous healthcare insurance;
  • Headspace subscription;
  • No stupid meetings;
  • Drinks, coffee, snacks, games etc.


Senior Engineer’s salary consists of three parts:
Base part: when joining us early in your career your salary may start from 3260 EUR Gross. Being more experienced, your base salary may be up to 5540 EUR Gross for this position.
In addition:
- significant yearly bonuses, approx 10 percent annual salary;
- Booking Holdings RSU (Restricted Stock Units) package, worth 20.000 USD (before taxes) with possibility to get it every year.

Salary range provided is not final and will be discussed during the process based on your skills and experience.


KAYAK, part of Booking Holdings (NASDAQ: BKNG), is the world’s leading travel search engine. With billions of queries across our platforms, we help people find their perfect flight, stay, rental car, cruise, or vacation package. We’re also transforming the in-travel experience with our app and new accommodation software. For more information, visit www.KAYAK.com.

As an employee of KAYAK, you will be part of a global network that includes OpenTable and KAYAK's portfolio of metasearch brands including Swoodoo, checkfelix, momondo, Cheapflights, Mundi and HotelsCombined. Many employees are dedicated to one brand, but we all have the benefit of using each others strengths and insights. Together, we're able to help people experience the world through dining and travel.

Diversity and Inclusion at KAYAK/OpenTable

We aspire to have a workplace that reflects all of the diverse communities we serve. We know that when we have diverse teams we produce more innovative ideas, products, services, and better business outcomes for our stakeholders. OpenTable/KAYAK is proud to be an Equal Opportunity Employer and we welcome and encourage candidates from all backgrounds and experiences to apply for roles on our team. Whoever you are, just be you.


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