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# Senior Java Engineer (Remote Within Spain)

- **Company:** Q Tech
- **Location:** Madrid, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Software as a Service, Continuous Integration, PostgreSQL, Node.Js, Backend, Build Management, Codebase
- **Published:** September 16, 2026
- **Apply:** https://www.buscojobs.com.es/senior-java-engineer-remote-within-spain-en-madrid-ID-370610464

## About the Role

Design and build backend services using Java + Spring Bring architectural vision, patterns, and best practices Help migrate existing Node.js components into the new Java stack Work with clean/hexagonal architecture and rich domain models Collaborate with a senior team and a technically strong CTO Make autonomous technical decisions that shape the platform Requirements
6+ years of experience working with
Java
in complex or high?reliability environments Strong expertise with
Spring
and the ability to design services from scratch PostgreSQL experience is a must
(data modelling, performance, migrations, consistency) Solid understanding of
clean/hexagonal architecture , domain?driven thinking and tactical patterns Strong testing mindset and familiarity with CI/CD and engineering best practices Ability to review, challenge and elevate the team's technical decisions Experience working with existing codebases and migrating functionality is a plus (some parts currently in
Node.js ) Autonomy to make technical decisions without constant oversight Good communication skills and a collaborative mindset Based in Spain (remote) Experience collaborating with distributed and multicultural teams What the role offers

## Description

OverviewAtQ-tech , we're looking for aSenior Java Engineerto join a global SaaS product that's scaling fast and moving into a more mature, reliability?focused phase.The platform handles a high volume of data and workflows used by customers across multiple countries.The team is strengthening its foundations to ensure stability, consistency and long?term scalability - and they're looking for someone who can take a leading role on the Java side.You'd becomethe Java reference point : someone who can set technical direction, build new services withJava + Spring + PostgreSQL , and help elevate the platform's engineering standards.There's also some existing functionality inNode.js , and part of the work involves gradually moving that logic into the new Java?based architecture.This isn't a "ship fast and patch later" environment.Quality matters: clean architecture, solid testing, strong patterns, observability, and a product that needs to behave predictably for demanding clients.What you'll doDesign and build backend services using Java + Spring Bring architectural vision, patterns, and best practices Help migrate existing Node.js components into the new Java stack Work with clean/hexagonal architecture and rich domain models Collaborate with a senior team and a technically strong CTO Make autonomous technical decisions that shape the platform Requirements6+ years of experience working withJavain complex or high?reliability environments Strong expertise withSpringand the ability to design services from scratch PostgreSQL experience is a must(data modelling, performance, migrations, consistency) Solid understanding ofclean/hexagonal architecture , domain?driven thinking and tactical patterns Strong testing mindset and familiarity with CI/CD and engineering best practices Ability to review, challenge and elevate the team's technical decisions Experience working with existing codebases and migrating functionality is a plus (some parts currently inNode.js ) Autonomy to make technical decisions without constant oversight Good communication skills and a collaborative mindset Based in Spain (remote) Experience collaborating with distributed and multicultural teams What the role offersBecome the go?to Java expert in the company Build critical components from scratch A real technical challenge with direct product impact A stable environment focused on doing things properly Remote work from anywhere in Spain + optional offices in several cities#J-*****-Ljbffr


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