Overview

At

Q-tech , we’re looking for a

Senior Java Engineer

to join a general 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 become

the Java reference point : someone who can set technical direction, build new services with

Java + Spring + PostgreSQL , and help elevate the platform’s engineering standards. There’s also some existing functionality in

Node.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 do

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

Become 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-18808-Ljbffr

📌 Senior Java Engineer (Remote within Spain) (Madrid)
🏢 Q-Tech
📍 Madrid