Quality Assurance (QA) Developer

What You'll Do

• Work closely with our Technology Lead, AI Developers, and UX/UI Design Lead to test and develop features.
• Review code produced with AI assistance before it reaches a client: check it does what the ticket asked, follows our conventions, and doesn’t contain invented APIs or bugs that look plausible at a glance.
• Work with our AI Developer to figure out how to fix issues: identify the actual problem, determine the correct fix, and assess risks of breaking other functionalities.
• Trace issues to their root cause — whether it's front-end, back-end, or prompt — and ensure the fix is implemented thoroughly.
• Proactively test AI features by attempting to break them, and document every successful case.
• Monitor Web Speed Optimization efforts after each release.
• Proactively report to our internal Project Manager and AI Developers, and manage your schedule to ensure all deadlines are met.
• Take on development tasks alongside the AI Developer on both internal tools and client features as you gain comfort.

Who You Are

• Located in Europe — this position requires adherence to our Spain office’s working hours (10am-6pm CET).
• Must be fluent in Spanish and professional English.
• Possess around 1 year of experience in web development or QA.
• Able to read and write JavaScript, and comfortable with a modern framework like React or Vue.
• Working knowledge of HTML5 and CSS3, sufficient to spot layout, responsive, and cross-browser issues.
• Understanding of back-end logic (using PHP and/or Node.js) to follow a feature end-to-end.
• Experience testing REST or GraphQL endpoints.
• Experience working inside Git and in an Agile environment.
• Comfortable working with AI assistants as part of your workflow, including writing effective prompts, critically reviewing generated code, and knowing when not to trust the output.
• Any hands-on experience with Large Language Models (LLMs), even through personal projects.
• A keen eye for detail, interactivity, and animation.
• A true team player who can work closely with others.