Fullstack Developer (Java/React/Python)

Job title: Fullstack Java Developer Location: Poland and Remote Work mode: Remote Type of cooperation: B2B Contract Salary range: 40-50 Euro/h B2B Net+ Vat

About the company/project: We are looking for an exceptional Senior Software Developer with a passion for coding who is not afraid to seek new solutions. We offer cooperation with a unique client who provides opportunities for development in many complex and global supply chain projects. You will join a new IT Hub, where you will encounter only new technologies and projects related to the creation of new functionalities.

Responsibilities: Full-stack development of innovative applications with Java, Spring, React, and modern JS frameworks. Develop and integrate AI-powered features using Python, leveraging LLMs Design and implement prompt engineering strategies to optimize model outputs and business use cases. Build and maintain LLM-based services (e.g. chatbots, recommendation engines, document processing pipelines). End-to-end ownership of the development lifecycle: design, architecture, coding, testing, deployment, and DevOps. Build and maintain microservices architectures and reactive UIs. Apply TDD/BDD practices with JUnit, Mockito, Jasmine, Selenium/Protractor. Contribute to CI/CD pipelines and deployments on Kubernetes / Cloud Foundry. Design and deliver cloud/hybrid solutions with high scalability and reliability. Work in XP practices, including remote pair programming and continuous delivery.

You are an ideal candidate if you have: BSc in Software Engineering or BS degree in Computer Science. 8+ years of experience in the following technologies: Java (must have), Spring. 2+ years of experience with Python -MUST 2+ years of experience in FE, mainly React (MUST), and other modern JavaScript Framework/libraries. Experience with LLMs/AI/Prompt Engineering/MCP. Experience with Functional Programming and Java Streams. Experience with developing a reactive UI (Reactive JS). 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium 3+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud) Experience in designing, developing, and deploying cloud/hybrid-based solutions. Experience in developing and deploying in Container based environments (Kubernetes, Cloud foundry). Familiarity with the following design concepts: micro-services, service discovery, circuit breaker. Good English - verbal and written.

Nice to have: Experience with Data Analytics – big advantage. Experience in development in Kotlin – big advantage. Experience in DevOps development and Jenkins