Hiring via TechTree This is a role that TechTree is recruiting for on behalf of one of its clients. TechTree is an

AI-driven recruitment platform working with high-growth companies.

When you apply, TechTree's AI Agent matches you not just to this role , but to other relevant opportunities across its network, so one application can unlock multiple roles.

Location: Europe / EMEA

Work model: Fully remote Employment: Full-time Level: Principal /

Staff Estimated compensation: €100,000–€200,000 Industry:

Healthcare AI The opportunity Build complex, production-grade AI agent systems from 0 to 1 Architect distributed systems for enterprise healthcare environments Work across LLMs, agent orchestration, tool calling, multi-turn routing, and MCP integrations Own system architecture, scalability, and reliability

Stay deeply hands-on while providing technical guidance to other engineers What we're looking for 7+ years building complex production systems Recent hands-on experience as a Staff,

Principal,



Senior ML/AI, or Senior Software Engineer Proven from 0

to 1 startup engineering experience Strong Python and ML/AI engineering background Shipped experience with AI agents, tool calling, agent harnesses, or multi-turn systems Strong systems thinking and distributed-systems experience High agency and comfort operating in ambiguous early-stage environments Based in Europe /

EMEA Strong advantages Healthcare or clinical systems experience

HIPAA, audit trails, or regulated-data environments Deep Data

Science / Machine Learning background Advanced agent infrastructure, MCP, routing, and prompt-management experience

Previous experience at high-growth AI-native startups Strong Math,

Physics, Computer Science, ML, or related academic background If this sounds like a fit, we'd love to hear from you. Apply today!

📌 Principal/Staff Software Engineer (Madrid)
🏢 CD Talent Advisory
📍 Madrid