Fullstack Java + React Developer (Java/Spring Boot/React + AI Tooling) - Portugal Remote
Mid or senior full-stack engineer building and operating distributed Java 17/Spring Boot 3 microservices and React 18/TypeScript frontends for a large retail client's high-traffic digital platforms. Work spans AWS, MySQL 8, containerisation, CI/CD and observability, with AI-assisted development tooling as a core part of the workflow.
- Compensation
- €2K–€2.6K / mo
- Location
- Porto, Portugal
- Work setup
- Not specified
- Seniority
- Middle
- Employment
- Not specified
- Experience
- Not specified
- Category
- Fullstack
- Posted
Skills
Must have
- Practical experience using AI tooling for code generation/refactoring, test creation, documentation, code analysis and investigation
- Ability to review, validate and improve AI-generated output for quality, security and maintainability
- Strong commercial Java experience (Java 17 LTS or above)
- Spring Boot 3.x experience
- Building and operating distributed systems, RESTful APIs and microservices
- MySQL 8: schema design, query optimisation and performance tuning
- AWS: building, deploying and maintaining cloud-native applications
- Strong commercial experience with JavaScript and TypeScript
- Experience building modern web applications with React 18
- Strong understanding of web performance, accessibility and responsive design
- Engineering best practices, testing, code quality and maintainable code
- Strong understanding of CI/CD practices and modern software delivery
- Experience with containerisation technologies
- Understanding of infrastructure, monitoring and observability practices
- Strong problem-solving and collaboration in cross-functional teams
- Fluent English, spoken and written
Nice to have
- Next.js in production environments
- Kubernetes and container orchestration platforms
- Apache Kafka or other event-streaming technologies
- Modern observability and monitoring tooling
- Experience in large-scale digital, retail or eCommerce environments
- AWS certifications
- Portuguese language skills
Full description
ABOUT THE OPPORTUNITY
We are looking for two Full Stack Engineers — one Senior and one Mid-level — to help build, evolve and operate scalable digital products that deliver real value to customers and internal teams. You will work across the full stack, contributing throughout the software development lifecycle: from API design and distributed backend services to modern, accessible web interfaces. This role combines strong hands-on engineering across the Java and JavaScript ecosystems with the practical use of approved AI-assisted development tools as part of a modern engineering workflow. You will own features end to end, in a team where technical decisions are discussed rather than dictated.
PROJECT & CONTEXT
The client is a well-established player in the retail sector, operating large-scale, high-traffic digital platforms where performance, reliability and scale are daily engineering concerns. The ecosystem is built on distributed, containerised services with a modern React/Next.js frontend layer and a mature CI/CD and observability culture. AI tooling is an established part of how the team works — not an experiment — and engineers are expected to use it critically, validating and improving what it produces. You will join a product-oriented team with a stable roadmap and a platform used by a large customer base.
WHAT WE'RE LOOKING FOR (Required)
AI-assisted engineering
- Practical experience using AI tooling to support development activities: code generation and refactoring, test creation and automation, documentation generation, code analysis and review, and technical investigation
- Ability to review, validate and improve AI-generated output to ensure quality, security and maintainability
Backend
- Strong commercial experience developing software with Java (recent versions — Java 17 LTS or above) and Spring Boot 3.x
- Experience building and operating distributed systems, RESTful APIs and microservices
- MySQL 8 — schema design, query optimisation and performance tuning
- AWS — building, deploying and maintaining cloud-native applications
Frontend
- Strong commercial experience with JavaScript and TypeScript
- Experience building modern web applications with React 18
- Strong understanding of web performance, accessibility and responsive design
Engineering practices
- Strong understanding of software engineering best practices, testing, code quality and maintainable code
- Strong understanding of CI/CD practices and modern software delivery approaches