Overview

At Q-tech, we’re looking for a Senior Java Engineer to join a integral 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 engi

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