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 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. xqbhyrx 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

¿Tiene las siguientes habilidades, experiencia e impulso para tener éxito en este puesto? Descúbralo a continuación.
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Hay opciones de teletrabajo/trabajo desde casa disponibles para este puesto.

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