Java Software Engineers (AI)

Location: Hybrid in the Kaunas office, Lithuania; commuting to the office 3 times per week is required.

Salary: €2,700–€3,990 gross monthly, plus significant yearly bonuses of approximately 10% of annual salary and a Booking Holdings RSU package worth $20,000 gross with possible yearly refreshes.

Company

hirify.global is a travel search engine within Booking Holdings, building travel-search, trip-planning, and corporate travel products.

What you will do

• Design, implement, and maintain reliable production software for travel-search and trip-planning experiences.
• Build and evolve APIs and services for AI-assisted search, conversational travel planning, itineraries, ASK AI, smart filters, and AI-generated hotel review summaries.
• Investigate technical problems, assess trade-offs, and improve reliability, performance, maintainability, observability, and production behavior.
• Write automated unit, integration, and end-to-end tests; participate in code reviews and technical discussions.
• Collaborate with engineers, product managers, and designers to clarify requirements and deliver accessible user experiences.
• Learn unfamiliar systems, document knowledge, contribute to development tools and engineering processes, and support delivery practices.

Requirements

• 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.
• Experience contributing to projects from design through implementation, release, and maintenance.
• Ability to explain technical decisions clearly in writing and conversation and take ownership while asking for input or support when needed.
• Good communication skills in English.
• Equivalent practical experience is accepted instead of a specific degree or educational path.

Nice to have

• 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 with web products, mobile products, or travel-related products.
• Experience improving accessibility, reliability, or usability.
• Experience with Spring, cloud services, CI/CD pipelines, and automated testing frameworks.

Culture & Benefits

• Hybrid work with the option to work from almost anywhere for up to 20 days per year.
• Career-growth funds, access to on-demand e-learning, and internal communities.
• Additional health insurance, flexible sick time off, sick-leave and parental-leave support, and a company-wide vacation week.
• Birthday day off, free lunches twice a week, daily office snacks, yoga, paid volunteering time, and no-meeting Fridays.
• Office and team events, company-paid therapy sessions through SpringHealth, and a Headspace subscription.