Senior Java Backend Engineer – Hybrid (Kaunas)

Kayak; United States; Hybrid; USD 42,000 - 85,000; Full time

Benefits offered by this job

Free lunch twice a week

Health insurance

Birthday leave

Vacation week

Yoga sessions

Job summary

Kayak, part of Booking Holdings, is seeking a senior Java backend developer to build and maintain its high‑performance search and booking technology. You will design scalable backend services, own solutions from design through production, and collaborate with data, commercial, and engineering teams.

The role requires 7+ years in Java and Spring, fluent English, and experience with PostgreSQL, MySQL, and Redis. The Kaunas office requires at least 3 days on site, with hybrid work options.

Qualifications

• 7+ years of experience with the Java ecosystem and Spring Framework (Boot, Security).
• Expertise in designing for high-throughput data environments using PostgreSQL, MySQL, and Redis.
• Education in Computer Science or a related field.
• Fluent English communication skills.
• Previous experience with AI/LLM would be a plus.

Responsibilities

• Design and maintain scalable backend search capabilities focused on speed, reliability, relevance, and user experience.
• Own complex technical solutions from design through operational support.
• Provide technical leadership by guiding architecture discussions and maintaining high engineering standards.
• Collaborate with commercial, data, and engineering teams to deliver robust technical solutions.
• Resolve production issues, improve system reliability, and reduce technical debt.
• Mentor engineers and contribute to better testing, observability, CI/CD, and development practices.

Skills

Java

Spring Framework

English (Fluent)

AI/LLM experience

Education

Computer Science or related field

Tools

ElasticSearch

Job description

Kayak, part of Booking Holdings, is seeking a senior Java backend developer to build and maintain its high‑performance search and booking technology. You will design scalable backend services, own solutions from design through production, and collaborate with data, commercial, and engineering teams.

The role requires 7+ years in Java and Spring, fluent English, and experience with PostgreSQL, MySQL, and Redis. The Kaunas office requires at least 3 days on site, with hybrid work options.