Senior Java Full-Stack Developer with React

We are looking for a Senior Java Full-Stack Developer with strong React expertise to join our team.

In this role, you will lead the design and delivery of complex, highly scalable web applications across both front-end and back-end layers. You will drive technical decisions, mentor fellow engineers, and partner closely with cross-functional teams to shape high-quality solutions that address strategic business and user needs.

This role offers a hybrid model, with 3 days per week working from our office in Kraków.

Responsibilities

• Architect, build, and maintain enterprise-grade web applications using React and Java
• Design, develop, and evolve REST APIs, ensuring scalability, security, and maintainability
• Define and optimize database solutions using PostgreSQL, including advanced query tuning and data modeling
• Establish and promote best practices for writing clean, maintainable, and well-tested code
• Lead code reviews, troubleshoot complex issues, and guide testing and debugging strategies
• Collaborate with product, QA, and engineering teams to define technical direction and deliver impactful features
• Mentor mid-level and junior developers, fostering technical growth within the team
• Contribute to architectural discussions and influence long-term technology choices

Requirements

• 3+ years of experience in full-stack development
• Strong proficiency in React and modern JavaScript/TypeScript, including state management and performance optimization
• Solid background in Java backend development, with deep expertise in Spring and Spring Boot
• Proven experience designing, building, and scaling RESTful APIs
• Advanced knowledge of PostgreSQL, including schema design, complex queries, indexing, and performance tuning
• Hands-on experience with Git, CI/CD pipelines, and agile methodologies
• Demonstrated ability to lead technical initiatives and mentor other engineers
• English proficiency at an Upper-Intermediate level (B2) or higher

Nice to have

• Solid experience with Docker and CI/CD automation
• Hands-on experience with cloud platforms (Azure preferred)
• Exposure to microservices architecture and distributed systems
• Experience with system design and architectural decision-making at scale

We offer

• We gather like-minded people:
• • Top tech minds driving innovation in AI, cloud and digital platform modernization
  • Supportive team and agile, startup-like culture
  • Hybrid by design mode and opportunity to work remotely within Poland
  • Chance to work abroad for up to 60 days annually
  • Business-driven relocation opportunities
• We provide growth opportunities:
• • Career development programs
  • Thought leadership, mentoring, soft skills and well-being programs
  • Certification (Anthropic, Gemini, GCP, Azure, AWS)
  • English classes
• We cover it all:
• • Stable pay
  • Participation in the Employee Stock Purchase Plan with a 15% discount
  • Benefits package (health insurance, multisport, shopping vouchers)
  • Referral bonuses up to $2,000
  • Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
  • Corporate, social and well-being events
• Please, note:
• • Benefits listed above are available to employees only
  • We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
  • We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.