MestrIA is a service platform providing end-to-end document intelligence solutions tailored for legal and financial teams across Europe—including law firms, banks, real estate servicers, debt recovery specialists, and insurers, insurance companies, transportation industry..
While generic AI tools struggle with complex, jurisdiction-specific documentation, MestrIA delivers complete, end-to-end workflows: automating data extraction from judicial and financial files, accelerating due diligence, and delivering confidence-scored, audit-ready precision.
Backed by EU funding and based in Spain, our platform operates on GDPR-compliant, EU-based infrastructure aligned with the EU AI Act and is actively expanding across Europe with live production deployments.
The Role
As an early-stage Senior Full-Stack Product Engineer, you will shape both our core end-to-end service platform and our engineering foundations from day one. Working directly with the founders and cross-functional teams, you’ll translate complex legal and financial workflows into secure, scalable, and maintainable software.




What you’ll do daily:
End-to-End Product Engineering:Build responsive front-end interfaces, scalable APIs, database workflows, and real-time processing status pipelines that deliver seamless client solutions.
AI Integration: Connect OCR, LLMs, and document processing pipelines with a focus on asynchronous workers, retries, and structured output validation.
Architecture & Security:Optimize PostgreSQL models, AWS infrastructure, CI/CD, and monitoring with privacy-by-design principles (GDPR / EU data residency).
What We’re Looking For
Core Tech Stack:
Backend:Python (FastAPI) and/or Node.js; experience building asynchronous jobs & RESTful APIs.
Frontend:TypeScript, React, Next.js, HTML, CSS.
Data:PostgreSQL (relational modeling, migrations, performance tuning).
Cloud & DevOps:AWS (ECS/Fargate, App Runner, S3, CDK/IaC), Docker, CI/CD, and production monitoring.
Requirements & Mindset:
System Desi

📌 Full Stack Engineer (Madrid)
🏢 MestrIA
📍 Madrid