Summary: Q-tech is seeking a Senior Java Engineer to lead technical direction, build new services with Java + Spring + PostgreSQL, and elevate engineering standards for a high-volume SaaS product. Highlights: 1. Become the Java reference point in a fast-scaling global SaaS product 2. Lead architectural vision, patterns, and best practices 3. Autonomous technical decisions shaping the platform Descripción At **Q\-tech**, we’re looking for a **Senior Java Engineer** to 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 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 **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 * Competitive Salary * Benefits: health insurance, training budget, meal vouchers, etc. Requisitos básicos * 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 60\.000€ \- 75\.000€ España 100% Remoto **Persona de contacto:** anprieto@q\-techrec.com \+34 639 525 928