> Markdown version of [/jobs/ext/4158266-sr-fullstack-engineer](https://www.wearedevelopers.com/jobs/ext/4158266-sr-fullstack-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. FullStack Engineer - **Company:** Q Tech - **Location:** Barcelona, Spain - **Salary:** €50,000 - €60,000 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Microsoft Azure, PostgreSQL, Service-Oriented Architecture, ReactJS, Spring-boot, Microservices - **Published:** October 27, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=1a13d05a36e21d78 ## About the Role * Solid experience as a Full Stack Engineer with Java (Spring Boot) and React. * Experience with PostgreSQL. * Experience with service-oriented or microservices architectures. * A methodical, structured engineering approach, used to working in regulated environments with demanding quality and security standards. * Microsoft Azure experience is a plus. * Hands-on experience with AI-assisted development tools is highly valued (this will be covered in the technical interview). ## Description * Develop and evolve features on a platform. * Lead the platform's modernization from traditional Java enterprise containers to a modern stack built on Spring Boot, React and microservices. * Separate and integrate microservices within a service-oriented architecture. * Help build a new module for automated asset tracking using digital chips, part of the platform's role as the single customer-facing layer for new digital solutions. * Work with high-volume data. * Collaborate closely with the platform's lead architect, who sets architecture guidelines and provides technical mentoring.