Senior Full Stack Developer (React, Java)

Warszawa, Poland Posted 8/16/2026 First seen 8/16/2026
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  • Minimum 5–7 years of professional software development experience.
  • Strong commercial experience with Java, Spring Framework, and Spring Boot.
  • Strong commercial experience with React.js and TypeScript.
  • Solid understanding of JavaScript (ES6+).
  • Experience working with AWS in production environments.
  • Strong understanding of microservices architecture.
  • Hands-on experience with SQL and relational databases.
  • Experience integrating and consuming REST APIs.
  • Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility.
  • Experience with frontend testing using Jest and React Testing Library.
  • Familiarity with modern frontend tooling and build processes.
  • Ability to work independently, take ownership of delivered solutions, and contribute to system design.
  • Excellent communication skills and experience working in Agile environments.

Nice to Have

  • Experience with Kafka or other event-driven architectures.
  • Knowledge of Hadoop or Apache Spark.
  • Experience with Next.js.
  • Experience with Redux, Zustand, or similar state management solutions.
  • Previous experience in Healthcare or Life Sciences projects.