Senior Java Engineer

About the Role

We’re looking for a Senior Software Engineer to help develop and evolve our cloud-native backend platform. You’ll work on building new capabilities while improving the scalability, performance and reliability of existing services.

This role is ideal for engineers who enjoy solving complex technical problems, taking ownership and collaborating with Product Managers, Architects and fellow Engineers to design solutions — not just implement requirements.

Our backend stack includes Java, Spring Boot, AWS, MySQL, DynamoDB and microservices, and we’re continuously evolving our platform as our products and customer base grow.

AI-enhanced development

Claude AI coding assistants are used as part of the everyday engineering workflow to increase productivity and reduce repetitive work. Engineers use AI to explore technical solutions, accelerate implementation, debug complex issues, generate and improve tests, create documentation and support code reviews. Engineering judgement, critical thinking and ownership remain at the core of everything built.

What you’ll do

• Design, build and maintain scalable Java backend services.
• Develop new platform capabilities while improving the performance and reliability of existing systems.
• Build and enhance integrations with airline and travel industry partners.
• Troubleshoot complex software issues and continuously improve system quality.
• Collaborate with Product Managers, Architects and Engineers to design technical solutions.
• Contribute to architecture discussions, code reviews and engineering best practices.
• Document technical solutions and share knowledge across the team.

What we’re looking for

• 5+ years of professional experience with Java.
• Strong experience with Spring Boot and microservices.
• Experience building and integrating REST APIs.
• Experience working with cloud platforms; AWS preferred.
• Strong understanding of software engineering fundamentals, clean code and testing.
• Experience with relational databases (MySQL) and ideally NoSQL databases (DynamoDB).
• Strong analytical and problem-solving skills.
• Fluent English, written and spoken.

Nice to have

• Experience with distributed systems.
• Event-driven architecture.
• AWS certification.
• Travel technology experience.
• Curiosity about AI-assisted software development.

What we offer

• Opportunity to influence architecture, technical decisions and product evolution.
• AI-enhanced software development with Claude AI coding assistants integrated into the daily engineering workflow.
• Stable employment based on an employment contract with 50% tax-deductible costs (KUP 50%), resulting in higher net pay.
• Hybrid work model: 3 days per week from the modern office at Hrubieszowska 2 in Warsaw.
• Private medical care and Multisport card.
• International engineering environment.
• Opportunities to learn, grow and make a real impact on the products built.