OverviewAt 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 doDesign and build backend services using Java + SpringBring architectural vision,



patterns, and best practicesHelp migrate existing Node.js components into the new Java stackWork with clean/hexagonal architecture and rich domain modelsCollaborate with a senior team and a technically strong CTOMake autonomous technical decisions that shape the platformRequirements6+ years of experience working with Java in complex or high‑reliability environmentsStrong expertise with Spring and the ability to design services from scratchPostgreSQL experience is a must (data modelling, performance, migrations, consistency)Solid understanding of clean/hexagonal architecture, domain‑driven thinking and tactical patternsStrong testing mindset and familiarity with CI/CD and engineering best practicesAbility to review, challenge and elevate the team’s technical decisionsExperience working with existing codebases and migrating functionality is a plus (some parts currently in Node.js)Autonomy to make techni

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