Senior/Principal Full Stack Engineer

About the role

An AI-driven HealthTech company building a unified platform that transforms how healthcare systems operate is looking for a Senior Full Stack Engineer in Buenos Aires. The role spans frontend interfaces, backend services, APIs and workflow systems, with the Principal level adding architectural leadership, technical standards and mentoring. The schedule is Monday to Friday, onsite 9:00 am to 5:00 pm CST, full time.

Key responsibilities

• Build end-to-end product features across frontend, backend and workflow layers, including user-facing apps, dashboards and internal tools
• Design and implement APIs, service logic, validation rules and integrations
• Turn complex operational requirements into intuitive product flows and scalable systems
• Work with product, design, AI, backend and cloud teams to deliver high-quality features
• Improve performance, usability, reliability and test coverage
• Take part in code reviews, architecture discussions and release planning
• Troubleshoot production issues and help resolve incidents
• (Principal level) Define technical direction, system architecture and engineering best practices, and mentor engineers

Required profile

• 5-8+ years (Senior) or 8+ years (Principal) in full stack software engineering
• Strong experience building production-grade applications end-to-end
• Solid understanding of application architecture, APIs and workflow-driven systems
• Nice to have: experience with AI-integrated applications, HealthTech, SaaS or regulated environments, and familiarity with FHIR or healthcare integrations

Required skills

• Frontend: modern JavaScript frameworks such as React
• Backend: TypeScript (primary), Python, Java
• Cloud: AWS
• Architecture: microservices, distributed systems; APIs: REST, workflow orchestration
• Data: data modeling and system integrations