Senior Full-Stack Engineer - AI Doc Platform (Hybrid: Madrid/BCN)

MestrIA is seeking an experienced Senior Full-Stack Product Engineer to shape the core platform from day one, collaborating with founders and cross-functional teams to deliver secure, scalable software for legal and financial workflows.

You will work on frontend interfaces, asynchronous backend tasks, and AI-powered document processing while prioritizing GDPR-compliant data handling and a startup mindset in a hybrid Madrid/Spain setting.