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KAYAK

Senior Software Engineer

KAYAK

. Design, implement and maintain reliable production software for KAYAK’s travel-search and trip-planning experiences .

Posted 9/23/2026full-timeConcord • Massachusetts • United StatesSenior💰 $125,000 - $140,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in building and maintaining production software, with a strong focus on Java, APIs, and AI applications. Proficient in automated testing, debugging, and improving software reliability and usability.

Highest-signal resume keywords
Java ProgrammingAPI DevelopmentAutomated TestingAI ApplicationsDistributed Systems

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
JavaAPIsAutomated TestingMachine LearningRelational DatabasesSpring FrameworkCloud ServicesCI/CD PipelinesSoftware Design PrinciplesDebugging
Soft Skills
Clear CommunicationOwnershipCollaboration
Industry Keywords
Travel ProductsHigh-Volume Consumer ProductsAccessibilityReliabilityUsability

Tech Stack

Tools & technologies
CloudDistributed SystemsJavaSpring

About the role

Key responsibilities & impact
  • Design, implement and maintain reliable production software for KAYAK’s travel-search and trip-planning experiences
  • Build and evolve APIs and services supporting AI-assisted search, conversational travel planning, itineraries and related user experiences
  • Investigate technical problems, assess trade-offs and choose practical solutions that improve reliability, performance and maintainability
  • Write automated tests and contribute to unit, integration and end-to-end testing quality
  • Participate in code reviews and technical discussions
  • Work with engineers, product managers and designers to clarify requirements and deliver useful, accessible user experiences
  • Contribute to ASK AI, smart filters, AI-generated hotel review summaries, Explore and related search experiences
  • Help make AI-assisted features dependable, transparent and useful to travelers
  • Learn unfamiliar systems and share knowledge through documentation, pairing and technical discussions
  • Monitor and improve production behavior through debugging, observability and root-cause analysis
  • Contribute to development tools, engineering processes and delivery practices

Requirements

What you’ll need
  • Experience building and maintaining production software
  • Proficiency in Java or another relevant programming language
  • Familiarity with APIs, data structures and software-design principles
  • Experience testing software and investigating defects or production issues
  • Ability to explain technical decisions clearly in writing and conversation
  • Ability to take ownership of assigned work while asking for input or support when needed
  • Experience contributing to projects from design through implementation, release and maintenance
  • Equivalent practical experience is welcome in place of a specific degree or educational path
  • Experience with distributed systems, search, personalization or other high-volume consumer products
  • Experience with AI, machine learning or large language model applications
  • Experience with relational databases or other structured data stores
  • Experience working on web products, mobile products or travel-related products
  • Experience improving accessibility, reliability or usability
  • Experience working with Java and Spring
  • Experience with cloud services, CI/CD pipelines and automated testing frameworks
  • Must be able to work from the Concord, MA office at least 3 days per week
  • Employer is unable to offer US work sponsorship, including OPT

Benefits

Comp & perks
  • Work from (almost) anywhere for up to 20 days per year
  • Company-paid therapy sessions through SpringHealth
  • Company-paid subscription to HeadSpace
  • Company-wide week off a year
  • No-meeting Fridays
  • Paid parental leave
  • Paid volunteer time
  • Development Dollars
  • Leadership development
  • Access to thousands of on-demand e-learning courses
  • Travel discounts
  • Employee Resource Groups
  • Six weeks of paid vacation plus a day off for your birthday
  • Free lunch two days per week
  • Pension plan contributions
  • Public transportation subsidies
  • Bike leasing program
  • Monthly social events, Thursday happy hours and sports teams
  • 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
  • Parental leave benefits
  • Annual bonus
  • Recurring RSU grants