KAYAK Tech Stack

Travel search engine aggregating flights, hotels, and packages across 70+ markets

Technology, Information and Internet Stamford, Connecticut 1,001–5,000 employees Founded 2004 Public Company

KAYAK operates a metasearch platform connecting millions of travelers to flights, hotels, rental cars, and vacation packages by indexing competing travel sites. The engineering and product-heavy hiring mix reflects active work on backend search optimization, booking logic, and third-party API integrations—areas where their pain points cluster around concurrency performance and booking success rates. Expansion into new countries is driving payroll and compliance scaling alongside broader internationalization efforts.

Tech Stack 63 technologies

Core StackJira NetSuite Google Analytics TypeScript React Redux Java Node.js C# MySQL Elasticsearch Salesforce ZoomInfo Swift Ruby Python Zendesk Excel Google Sheets Freshservice CSS Sass LinkedIn Sales Navigator Google Workspace Microsoft Office UIKit XCTest bash LinkedIn Google+32 more

AdoptingSwiftUI

What KAYAK Is Building

◆Challenges

Compliance with local payroll regulations
Expanding payroll into new countries
Complex payroll environment
Optimizing search and booking logic
Content coverage for corporate customers
Booking success rates
Revenue growth for email and data partnerships
Multinational payroll complexity
Maintaining high-concurrency performance
Complex customer and technical requirements

▲Active Projects

Roll-out of new product features
Content integrations across all verticals
Payroll setup for new country expansion
Expansion of booking and servicing capabilities
Content strategy roadmap maintenance
System integration design and monitoring
Email audience revenue growth roadmap
Backend search and booking feature development
Third-party api integration
Global process alignment and improvement initiatives

Hiring Activity

Accelerating75 roles · 35 in 30d

Department

Engineering

Finance

Product

Marketing

Sales

Design

Communications

Data

Seniority

Senior

Mid

Manager

Director

Intern

Junior

Principal

Staff

Notable leadership hires: Creative Director, Associate Creative Director

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About KAYAK

KAYAK is a public travel search engine operating across more than 70 countries and territories. The platform aggregates real-time availability and pricing from airlines, hotels, car rental agencies, and package providers, surfacing results through web and mobile apps. The company offers ancillary tools including price forecasting, trip management (KAYAK Trips), and explore features. KAYAK operates as part of Booking Holdings Inc. and shares a portfolio that includes sister brands OpenTable, momondo, Cheapflights, Swoodoo, checkfelix, Mundi, and HotelsCombined. The company employs over 1,000 people distributed across North America, Europe, South America, and other regions.

HeadquartersStamford, Connecticut

Company Size1,001–5,000 employees

Founded2004

Hiring MarketsGermany, Lithuania, United States, Brazil, Spain, United Kingdom, Ireland, Denmark

Frequently Asked Questions

What tech stack does KAYAK use?

KAYAK runs TypeScript, React, Redux, Java, Node.js, C#, and Python in production. Search and indexing rely on Elasticsearch; booking and transactional data flow through MySQL. Desktop and mobile clients use Swift and UIKit on iOS. Backend services communicate via third-party APIs. Teams coordinate work in Jira and track analytics via Google Analytics.

What is KAYAK working on?

Active initiatives include backend search and booking feature development, third-party API integration work, content expansion across verticals, global process alignment, email partnership revenue growth, and payroll system setup for geographic expansion. Search performance optimization and booking success rates are documented challenges.