Senior Full-stack Developer (React/Java)

Java

Senior Full-stack Developer (React/Java)

Java
-, Warszawa +3 Locations

iTeamly

Job offers iTeamly
Full-time
B2B
Senior
Remote
3 488,06 - 6 439,50 USDNet per month - B2B

Job description

✅ Your responsibilities:

  • Design, develop, and maintain scalable full stack applications using Java and React.

  • Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS.

  • Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript.

  • Design and implement scalable frontend architecture and reusable UI components.

  • Collaborate closely with Product Owners, QA Engineers, and other development teams.

  • Integrate frontend applications with REST APIs and backend microservices.

  • Contribute to architectural decisions and technical discussions.

  • Ensure application performance, scalability, security, and maintainability.

  • Participate in code reviews, sprint planning, and Agile ceremonies.

  • Support deployment automation, production operations, and troubleshooting.

  • Mentor less experienced developers and promote engineering best practices.

🧠 Our requirements:

  • Minimum 4–5 years of professional software development experience.

  • Commercial experience with Java, Spring Framework, and Spring Boot.

  • Commercial experience with React.js and TypeScript.

  • Solid understanding of JavaScript (ES6+).

  • Experience working with AWS in production environments.

  • 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.

🌟 What we offer:

  • Long-term cooperation on an international project.

  • Flexible working hours.

  • Opportunity to influence architecture and technical decisions.

  • Modern technology stack.

  • Supportive, collaborative engineering culture.

  • Learning and development opportunities.

  • Modern equipment and comfortable working environment.

Tech stack

    English

    B2

    Java

    advanced

    React

    advanced

    AWS

    regular

    Spring

    regular

    JavaScript

    regular

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