Senior Java Full-Stack Developer with React

EPAM Systems; Kraków; Hybrid; PLN 279,000 - 446,000; Full time

Benefits offered by this job

Health insurance

Multisport card

Relocation opportunities

Employee Stock Purchase Plan

Job summary

EPAM Systems, Inc. is seeking a Senior Java Full-Stack Developer with strong React expertise to join our team in Kraków. You will lead the design and delivery of complex, scalable web applications across front-end and back-end layers, mentor engineers, and collaborate with cross-functional teams to shape high-quality solutions.

The role offers a hybrid model with 3 days per week in our Kraków office and opportunities to work with global clients on AI, cloud and platform modernization initiatives.

Qualifications

• 3+ years in full-stack development.
• Strong React and TypeScript/JavaScript skills.
• Java backend with Spring and Spring Boot.
• Experience designing and scaling REST APIs.
• Advanced PostgreSQL: schema, queries, indexing.
• Git, CI/CD and agile practices.
• English Level: Upper-Intermediate (B2+).

Responsibilities

• Architect, build, and maintain scalable web apps using React and Java.
• Design, develop, and evolve REST APIs for scalability and security.
• Define DB solutions in PostgreSQL with advanced indexing.
• Lead code reviews and guide testing and debugging strategies.
• Mentor mid-level and junior developers.
• Collaborate with product, QA, and engineering teams on tech direction.
• Drive architectural decisions and long-term tech choices.

Skills

Team leadership

Mentoring

English communication

Agile methodologies

System design

Tools

React

Java

Spring

Spring Boot

PostgreSQL

Git

CI/CD

Docker

Azure

Microservices

Job description

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.ResponsibilitiesArchitect, build, and maintain enterprise-grade web applications using React and JavaDesign, develop, and evolve REST APIs, ensuring scalability, security, and maintainabilityDefine and optimize database solutions using PostgreSQL, including advanced query tuning and data modelingEstablish and promote best practices for writing clean, maintainable, and well-tested codeLead code reviews, troubleshoot complex issues, and guide testing and debugging strategiesCollaborate with product, QA, and engineering teams to define technical direction and deliver impactful featuresMentor mid-level and junior developers, fostering technical growth within the teamContribute to architectural discussions and influence long-term technology choicesRequirements3+ years of experience in full-stack developmentStrong proficiency in React and modern JavaScript/TypeScript, including state management and performance optimizationSolid background in Java backend development, with deep expertise in Spring and Spring BootProven experience designing, building, and scaling RESTful APIsAdvanced knowledge of PostgreSQL, including schema design, complex queries, indexing, and performance tuningHands-on experience with Git, CI/CD pipelines, and agile methodologiesDemonstrated ability to lead technical initiatives and mentor other engineersEnglish proficiency at an Upper-Intermediate level (B2) or higherNice to haveSolid experience with Docker and CI/CD automationHands-on experience with cloud platforms (Azure preferred)Exposure to microservices architecture and distributed systemsExperience with system design and architectural decision-making at scaleWe offerWe gather like-minded people:Top tech minds driving innovation in AI, cloud and digital platform modernizationSupportive team and agile, startup-like cultureHybrid by design mode and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Career development programsThought leadership, mentoring, soft skills and well-being programsCertification (Anthropic, Gemini, GCP, Azure, AWS)English classesWe cover it all:Stable payParticipation in the Employee Stock Purchase Plan with a 15% discountBenefits package (health insurance, multisport, shopping vouchers)Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and moreCorporate, social and well-being eventsPlease, note:Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe will reach out to selected candidates exclusivelyEPAM 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.