Senior FullStack Java Developer

Senior Java Developer

IT · Warsaw (City Center) · Hybrid

About the Client

Our Client is a fast-growing, international technology company that provides innovative digital solutions for the global market. They are currently expanding and developing their R&D center in Warsaw. They focus on building high-quality, scalable products using modern tech stacks and agile methodologies. With a strong emphasis on engineering excellence, they offer a collaborative environment where experts can thrive and influence the technical direction of the products.

Please note: Optiveum is a recruitment agency conducting this search on behalf of our Client.

Role Overview

We are seeking a highly skilled Full Stack Developer with expertise in Java and React.js to join our dynamic team. The ideal candidate should have over 5 years of experience in designing, developing, and deploying scalable web applications. This role requires strong front-end and back-end development expertise, working in an Agile environment to deliver high-quality software solutions.

Key Responsibilities

• Front-End Development: Design and develop interactive, responsive, and high-performance UI components using React.js, Redux, and modern JavaScript (ES6+). Ensure cross-browser compatibility and a seamless user experience, while optimizing front-end performance and implementing best practices in UI/UX design.

• Back-End Development: Develop and maintain RESTful APIs and microservices using Java (Spring Boot, Hibernate, JPA). Implement robust authentication, authorization, and data management solutions, working with relational and NoSQL databases such as PostgreSQL, MySQL, and MongoDB.

• System Integration & Deployment: Integrate third-party services, APIs, and cloud-based solutions. Manage deployments using CI/CD pipelines and containerization tools like Docker & Kubernetes.

• Code Quality & Testing: Write clean, maintainable, and efficient code following best practices. Implement unit and integration tests for both front-end and back-end components.

• Collaboration & Agile Development: Work closely with UI/UX designers, product managers, and DevOps engineers. Participate in Agile/Scrum ceremonies and contribute to continuous process improvements.

Requirements & Qualifications

• Experience & Education: Bachelor's or Master's degree in Computer Science, Engineering, or a related field. 5+ years of professional experience as a Full Stack Developer with Java & React.js, alongside experience working with Agile development methodologies.

• Front-End Stack: Proficiency in React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript (ES6+). Strong understanding of state management libraries and component-based architecture. Experience with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS.

• Back-End Stack: Expertise in Java, Spring Boot, Hibernate, JPA, and RESTful API development. Experience with microservices architecture and API Gateway implementations. Knowledge of authentication mechanisms like OAuth2, JWT, and session-based authentication.

• Database & DevOps: Experience with SQL databases (PostgreSQL, MySQL) and NoSQL databases (MongoDB, Redis). Hands-on experience with CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD). Familiarity with cloud platforms (AWS, Azure, GCP) and containerization using Docker, Kubernetes.

• Soft Skills: Strong problem-solving and analytical skills. Excellent communication and teamwork abilities. Ability to manage multiple priorities in a fast-paced environment. Passion for learning new technologies and improving existing processes.

What Is Offered

• Compensation: Monthly compensation up to $6,200 (depending on experience and interview results).

• Contract Type: B2B contract via Optiveum.

• Work Model: Hybrid (3 days working from the office located in the center of Warsaw, 2 days working from home).

• Stability: Long-term cooperation with a stable, international organization.

• Growth: Opportunity to work with the latest technologies and high-impact projects.