KAYAK is looking for a dedicated 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 bring your skills to build applications that our partners will use to create ad content, handle targeting and bids on their ads. You will also work with different data systems, write ETLs and collect data that will support building reports and dashboards that provide insights into how the ads perform and help our partners with improving the ROI of their ads. Your day to day will involve writing a lot of code from building APIs, designing databases, improving performance by solving scale problems in the application. The role presents an outstanding opportunity to work with a geographically distributed team and working with different teams across the organisation and company. 



  • 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 several different types of data storage systems that support the KAYAK ad network, including but not limited to MySQL, memcache, Hive/Hadoop, Aerospike, Snowflake and Redis storage systems;

  • Identifying and resolving sophisticated 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.


Required Skills

  • 2+ years Java experience, experience with Java web development a plus;

  • Excellent programming fundamentals;

  • Working knowledge of SQL. Hive/Hadoop, Aerospike, Redis is a plus;

  • Some front end development experience preferred, but not required.



  • Team player who loves to engage with colleagues at a professional and personal level;

  • Someone who can handle a various request and prioritize their own work while taking infrastructure and business needs into account;

  • Must have excellent technical communication skills.


Benefits and Perks

  • Flexible working hours;
  • Remote work option;
  • Opportunities to work in any KAYAK office around the globe;
  • Day off on your birthday;
  • Additionally paid paternity/maternity leave;
  • Generous healthcare insurance;
  • Free lunch twice a week;
  • Free Yoga classes twice a week;
  • Headspace subscription - to relax after work;
  • No stupid meetings;
  • The greatest team events and excursions;
  • Drinks, coffee, snacks, games etc.



Engineer’s salary consists of three parts:
Base part: when joining us early in your career your salary may start from 1050 EUR neto (after paying tax). Being more experienced, your base salary may be up to 2400 EUR neto (after paying tax) 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

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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