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

Apply ID: 307 Published on: 20/05/2026