Full Stack Engineer

Square One Resources Limited; España; A distancia; EUR 46.000 - 55.000; Jornada completa

Descripción de la vacante

Square One Resources Limited is seeking a experienced Full Stack Engineer for a 12-month remote contract across Europe. The role focuses on building scalable web applications using Java/Spring Boot or Node.js with React and TypeScript.

You will own features end-to-end, collaborate with distributed teams, and ensure secure, reliable solutions that meet business requirements. The position starts November 2026 and offers a daily rate of €250-€300.

Formación

• Proven experience designing and delivering full-stack web apps.
• Ability to own product features across development lifecycle.
• Strong debugging and performance optimization skills.

Responsabilidades

• Design, develop and maintain full-stack apps using Java/Spring Boot or Node.js with React/TypeScript.
• Build and integrate RESTful APIs within microservices architectures.
• Work with relational and non-relational databases to support functionality.
• Contribute to technical design discussions balancing scalability and timelines.
• Develop unit tests and promote test-driven development.
• Identify and resolve performance and debugging issues.
• Implement secure coding practices and handle security risks.
• Lead feature development and participate in code reviews.
• Support CI/CD processes, deployment and containerisation.

Conocimientos

Java / Spring Boot

Node.js

React.js / TypeScript

REST APIs / Microservices

Databases (PostgreSQL / MySQL)

Docker & Kubernetes

Cloud platforms (AWS / Azure / GCP)

CI/CD (Git / GitLab / Jenkins / Bitb)

Problem solving & collaboration

Herramientas

Git

GitLab

Jenkins

Bitbucket

AWS

Azure

GCP

Descripción del empleo

Full Stack Engineer - Java / Node.js & React

Location: Remote - Europe
Contract: 12 months
Rate: €250-€300 per day
Start: November 2026

About the Role

We 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 & Experience

• Strong 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 Experience

• Developing 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.