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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Engineer - **Company:** Duetto Research - **Location:** Madrid, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Artificial Intelligence, Amazon Web Services, Code Generation, Code Review, MongoDB, NoSQL, E2e Testing, Migration Manager, Standard Sql, Data Driven Tests, TypeScript, Web Applications, ReactJS, Prompt Engineering, Spring-boot, Cypress (Programming Language), Backend, Event Driven Architecture, Kubernetes, Playwright, Graphql, Front End Software Development, Domain Driven Design, Microservices - **Published:** July 4, 2026 - **Apply:** https://es.indeed.com/viewjob?jk=68c86c14fdf092c9 ## About the Role You may be a good fit if you have: * 4-6 years of full-stack engineering experience with production depth across both backend and frontend * Strong proficiency in Java and Spring Boot for enterprise backend development * Strong proficiency in TypeScript and React for modern web applications * Experience building and maintaining GraphQL APIs * Solid working knowledge of SQL and NoSQL databases, particularly MongoDB * Hands-on experience with end-to-end testing frameworks - Cypress or Playwright * A working understanding of microservices architecture and event-driven integration patterns * Demonstrated experience with Claude Code CLI or a comparable AI code generation tool - you're comfortable in a generate-and-review workflow, not just curious about it Strong candidates may also have: * Experience in or exposure to the hospitality technology sector * A background in legacy modernisation - monolith decomposition, migration planning, or similar * Familiarity with Domain-Driven Design (DDD) in an enterprise context * Experience with AI code review tools such as CodeRabbit or Augment * Working knowledge of AWS, Kubernetes, and CI/CD pipeline management ## Description * You'll own full-stack feature delivery end-to-end - from requirements through to production - across Java/Spring Boot microservices and TypeScript/React frontends, including monitoring and troubleshooting in live environments. * You'll make independent architectural decisions and convert prototypes into scalable, maintainable production systems, collaborating closely with Product, Design, and Engineering to hold a high bar for end-user quality. * You'll drive the migration of our legacy monolith, applying Domain-Driven Design principles, event-driven architecture patterns, and structured decomposition strategies to modernise software at scale. * You'll champion test quality by writing automated end-to-end tests in Cypress or Playwright and embedding data-driven testing practices across the team. * You'll mentor peers on prompt engineering, AI-assisted development, and code review - operating confidently in a generate-and-review model where 50-70% of code is AI-generated. * You'll contribute to and improve AI-augmented engineering workflows, building and refining custom skills, agents, and agentic pipelines that accelerate the whole team's delivery velocity. ## Related Videos - [40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs](https://www.wearedevelopers.com/videos/208-40-minutes-to-build-a-serverless-covid-19-rest-and-graphql-apis) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)