Fullstack Java & React Developer – Kraków (Hybrid)

• Strong experience with Java, Spring Boot, and related backend frameworks
• Solid experience with React.js, Redux, or state management libraries
• Proven experience in designing and consuming RESTful APIs and microservices architecture
• Proficient in JavaScript, HTML5, CSS3, and modern frontend tooling (Webpack, Babel, ESLint)
• Experience with relational databases (MySQL, PostgreSQL) and/or NoSQL databases
• Familiarity with Git, version control workflows, and Agile/Scrum methodologies
• Understanding of unit testing, integration testing, and test-driven development (TDD)
• Good problem-solving and communication skills in English

Nice to have:

• Experience with TypeScript and advanced React patterns (Hooks, Context API, Suspense)
• Knowledge of Docker, Kubernetes, or cloud platforms (AWS, Azure, GCP)
• Experience with event-driven architectures, message queues, or Kafka
• Familiarity with GraphQL or WebSocket-based real-time applications

• Architect, implement, and maintain backend services using Java, Spring Boot, and related frameworks
• Build responsive, modular, and maintainable React.js applications with a focus on component-driven design
• Design and implement RESTful APIs and microservices, ensuring high performance, security, and scalability
• Collaborate with cross-functional teams to define technical requirements, system architecture, and feature implementation
• Apply unit testing, integration testing, and end-to-end testing best practices (JUnit, Mockito, Jest, React Testing Library)
• Participate in code reviews, enforce coding standards, and promote best practices in clean code, SOLID principles, and design patterns
• Troubleshoot and optimize application performance and resolve production issues
• Manage CI/CD pipelines, automate deployments, and support DevOps practices
• Stay up-to-date with emerging technologies and frameworks to continuously improve application architecture

Please be informed that the data controller is strategicsIQ___ (hereinafter "controller"). You have the right to request access to your personal data, their rectification, erasure or restriction of processing, the right to object to processing, as well as the right to data portability and to lodge a complaint to the supervisory authority. Personal data will be processed for the purpose of the recruitment process. Provision of data to the extent resulting from the Act of 26 June 1974 Labour Code is mandatory. In the remaining scope, providing data is voluntary. Refusal to provide mandatory data may result in the impossibility to carry out the recruitment process. The Administrator processes mandatory data on the basis of a legal obligation incumbent upon him/her, while with regard to additional data, the basis for processing is consent. Personal data will be processed until the recruitment procedure is completed and for the period of the possibility of asserting potential claims, and in the case of consent to participate in future recruitment procedures - until the withdrawal of such consent. Consent to the processing of personal data can be withdrawn at any time. The recipient of the data is the Just Join IT service and other entities to whom we have entrusted the processing of data in connection with recruitment.