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December 17, 2025

Senior Full Stack Developer (Java + React)

Senior • Remote

20,000 - 25,000 USD/mo

Warsaw, Poland

Senior Full Stack Developer (Java + React)


📍 Location: Remote

📃 Contract type: B2B

💰 Rate: up to 25,000 PLN net + VAT / 6800 USD month

🚀 Start date: ASAP / flexible

📆 Project duration: Long-term cooperation


💼 About the Role

We're looking for an experienced Senior Full Stack Developer to join a highly agile team working on the end-to-end development of modern applications. You’ll be involved in design, architecture, coding, and DevOps, all within an Extreme Programming (XP) setup that includes remote pairing, Test-Driven Development (TDD), and continuous integration


Responsibilities:


🧩 Responsibilities

  • Full ownership of the software development lifecycle: architecture, implementation, and deployment.

  • Collaborate with a remote-first, XP-driven development team.

  • Build scalable, cloud-native applications using Java and React.

  • Design and build microservices-based architecture and RESTful APIs.

  • Deploy and maintain solutions using Kubernetes and CI/CD pipelines (Jenkins).

  • Follow TDD and BDD practices with proper testing frameworks.

  • Continuously improve software quality and team processes.


We are looking for:

✅ Required Skills

  • 6+ years of experience in backend development using Java and Spring Boot / Cloud

  • 4+ years of experience in frontend development with React (must-have)

  • Experience with Java Streams and functional programming concepts

  • Experience building Reactive UI (Reactive JS)

  • 2+ years working in TDD/BDD (JUnit, Jasmine, Mockito, Protractor/Selenium)

  • Solid experience with microservices architecture

  • Proficiency in DevOps tools and pipelines (e.g., Jenkins, Git)

  • Hands-on experience with Kubernetes / Cloud Foundry

  • Experience designing cloud/hybrid solutions

  • Familiarity with microservices patterns (service discovery, circuit breaker, etc.)

  • Good command of English (min. B2)


➕ Nice to Have

  • Experience with Kotlin

  • Experience evaluating architecture and tech stack

  • Hands-on with CI/CD, cloud platforms (AWS, Azure), or container tools