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# Staff Software Engineer

- **Company:** Cross Border Talents
- **Location:** Barcelona, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Amazon Web Services, Application Performance Management, Microsoft Azure, Cloud Computing, Code Review, Distributed Systems, Python (Programming Language), Systems Architecture, AI Infrastructure, Reinforcement Learning, Google Cloud, Enterprise Software Applications, Large Language Models, Backend, AI Platforms, Information Technology, Free and Open-Source Software, Virtual Agents
- **Published:** July 16, 2026
- **Apply:** https://es.trabajo.org/oferta-4021-b252c8d8e8db16117ee012ff1ee875fe

## About the Role

Employment Type: Full-time (Permanent or B2B) - Level: Senior Level (Staff Engineer) - Work Authorization: Must have existing work authorization in an EU country. Employment is available across Europe through an Employer of Record (EOR) where applicable. About the Role We're looking for a Staff Software Engineer to design, build, and scale the distributed systems powering autonomous AI clinicians. This is a highly hands-on, Python-first engineering role focused on production systems, AI infrastructure, and large-scale backend architecture. You'll help shape technical direction while remaining deeply involved in implementation, partnering closely with founders and engineering teammates to solve complex, real-world healthcare challenges. What You'll Do AI Platform Engineering; - Design and scale AI agents for healthcare applications - Build distributed backend systems supporting AI-driven clinical workflows - Develop secure healthcare infrastructure for enterprise customers - Work on, system design and architecture skills - Proven experience turning ambiguity into scalable solutions - Strong backend engineering fundamentals - Startup or high-growth company experience - Experience mentoring engineers through technical leadership - High ownership and builder mindset - Excellent communication skills - Based in Europe Nice to Have; - Healthcare technology experience - AI, LLM, or Agentic AI experience - Reinforcement Learning - Cloud infrastructure (AWS, GCP, Azure) - Enterprise software experience - Open-source contributions - Experience building products from zero to production - Background in Computer Science, Mathematics, or Physics What We Offer - Competitive salary - Meaningful equity package - Fully remote across Europe - Flexible employment (Permanent or B2B) - High ownership from day one - Direct collaboration with founders - Small, elite engineering team - Opportunity to shape core technical architecture -

## Description

LLM, reinforcement learning, and agent-based architectures System Architecture; - Design scalable production architectures - Improve reliability, scalability, and system performance - Own critical engineering decisions across distributed systems - Continuously optimize infrastructure and application performance Technical Leadership; - Support engineers through code reviews and technical mentorship - Drive engineering best practices and architecture discussions - Collaborate closely with founders and product teams - Help maintain a high engineering bar across the organization Product Development; - Translate ambiguous product requirements into production systems - Ship features rapidly while maintaining engineering quality - Collaborate across engineering, product, and customer teams What We're Looking For Must Have; - 7+ years building production software systems - Strong Python engineering experience - Experience designing distributed systems at scale - Excellent


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