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# Principal Software Engineer

- **Company:** C&D Talent Advisory
- **Location:** Barcelona, Spain (Remote available)
- **Salary:** €100,000.0 - €200,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Cloud Computing, Distributed Systems, Python (Programming Language), Machine Learning, Software Architecture, Software Systems, TypeScript, Reinforcement Learning, Large Language Models, Multi-Agent Systems, Free and Open-Source Software
- **Published:** June 1, 2026
- **Apply:** https://www.opcionempleo.com/jobad/esb3710d0ed936814f894d24e429258366

## About the Role

* 5+ years of experience building complex production-grade software systems
 * Strong backend engineering expertise, ideally with Python
 * Experience designing scalable distributed systems
 * Ability to transform ambiguous business requirements into robust technical solutions
 * Strong software architecture and systems design skills
 * Experience operating in startup, scale-up, or high-growth environments
 * Comfortable working independently with high ownership and accountability, * Experience with AI, machine learning, LLMs, or agentic systems
 * Healthcare technology, health data, or clinical workflow experience
 * Experience with cloud infrastructure and large-scale systems
 * Proficiency in additional languages such as Go, Rust, TypeScript, or similar
 * Open-source contributions, hackathons, or side projects demonstrating technical excellence
 * Experience mentoring engineers and contributing to technical strategy

## Description

As a Principal Software Engineer, you will help architect and build the core systems powering next-generation healthcare AI products. You will work directly on AI-driven patient communication, triage systems, agent orchestration platforms, secure healthcare infrastructure, and low-latency voice and video technologies.
This is a hands-on engineering role focused on building production-grade systems that operate reliably at scale.
What You'll Do

 * Design and scale AI-powered healthcare platforms and distributed systems
 * Build and optimize agent-based architectures and orchestration systems
 * Develop secure healthcare data infrastructure and enterprise integrations
 * Work on systems leveraging LLMs, AI agents, reinforcement learning, and modern AI technologies
 * Improve system performance, reliability, scalability, and clinical accuracy
 * Collaborate closely with founders and a highly technical engineering team
 * Take ownership of technical decisions from architecture through deployment


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