Full Stack Engineer
- Java / Node.js & ReactLocation: Remote
- EuropeContract: 12 monthsRate: €250-€300 per dayStart: November 2026About the RoleWe are seeking an experienced Full Stack Engineer for an exciting 12-month remote contract with an established international organisation. You will contribute to the design, development and optimisation of scalable web applications, working across both front-end and back-end technologies.
You will take ownership of product features, collaborate with technical teams across the development lifecycle, and ensure solutions are secure, reliable and aligned with business requirements.

Key Responsibilities
Design, develop and maintain full-stack web applications using Java (Spring Boot) or Node.js, alongside React and TypeScript.
Build and integrate RESTful APIs within microservices-based architectures.
Work with relational and non-relational databases to support application functionality and performance.
Contribute to technical design discussions, balancing scalability, business value and delivery timelines.
Develop unit tests and promote test-driven development practices.
Identify and resolve technical issues, including application performance and debugging challenges.
Implement secure coding practices and consider potential security risks.




Participate in peer reviews and maintain high standards of code quality.
Lead the development and delivery of individual product features.
Support containerisation, deployment and continuous integration processes.
Essential Skills & ExperienceStrong programming experience with Java and Spring Boot or Node.js.
Excellent knowledge of JavaScript (ES6 ), TypeScript and React.js.
Experience with REST APIs, JSON/XML, microservices and API gateway integrations.
Practical experience with databases such as PostgreSQL, MySQL, Oracle or Elasticsearch.
Understanding of web performance optimisation, browser security, CORS, XSS, CSRF and WCAG accessibility standards.
Experience with Docker and Kubernetes.
Familiarity with AWS, Azure or Google Cloud Platform.
Knowledge of CI/CD pipelines and version control tools such as Git, GitLab, Jenkins or Bitbucket.
Strong analytical, problem-solving and debugging skills.
Confident communication skills and the ability to collaborate with distributed technical teams.
Desirable ExperienceDeveloping administrative consoles or data-intensive dashboard interfaces.
Exposure to Enterprise Content Management (ECM), Business Process Management (BPM) or Intelligent Document Processing (IDP) platforms.
Experience working with complex microservices environments.

📌 Full Stack Engineer (España)
🏢 Square One Resources
📍 España