Full Stack Developer

Location: Barcelona (Hybrid)  
Contract: Permanent  
Salary range: up to 64K

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About the Role

A motivated Full Stack Developer is needed to join the Health & Account Squad, a multidisciplinary team dedicated to building and scaling customer-facing services in the health and identity management domain.

The role emphasizes frontend expertise, particularly in the design and implementation of authentication and account features such as registration, login flows, and account pages, integrated with Auth0. At the same time, the developer will contribute to the backend services and APIs that enable key functionalities, including prescription management, MyMeds reservations, and Single Sign-On.

Working side by side with backend engineers, mobile developers, QA specialists, and UX/UI designers, this position provides the opportunity to shape critical customer experiences while ensuring secure and reliable system integration.

 

Key Responsibilities

• Own the end-to-end development of customer-facing features across frontend and backend.
  
• Build authentication and account components with React, HTML, CSS, and JavaScript/TypeScript.
  
• Integrate Auth0 and CIAM solutions for secure login and SSO across web and mobile.
  
• Develop backend services with ASP.NET Core and C#.
  
• Manage and design data solutions with SQL and NoSQL databases.
  
• Ensure quality with unit, integration, and end-to-end testing.
  
• Support delivery pipelines and Infrastructure as Code practices.
  
• Operate and troubleshoot systems in Azure or other cloud platforms.
  
• Apply SOLID principles and architecture patterns to build scalable solutions.
  
• Collaborate with UX/UI designers and mobile developers for seamless integrations.
  
• Mentor junior developers as the squad expands.
  

Requirements

• 5+ years in software development with strong backend foundations.
  
• Proven expertise with .NET Core and API development.
  
• Solid experience with React and core web technologies (HTML, CSS, JavaScript/TypeScript).
  
• Background in authentication and identity flows (OAuth2, SSO, CIAM, Auth0) would be a plus.
  
• Strong SQL knowledge and exposure to data platforms (e.g., Databricks).
  
• Familiarity with cloud platforms (Azure preferred).
  
• Experience with Agile, problem-solving, and cross-functional collaboration.
  
• Fluent English (Spanish is a plus).
  

Why This Role is Exciting

• Cross-stack ownership: contribute to both the frontend experiences and backend services.
  
• Critical scope: work on high-impact features like customer accounts, SSO, and prescriptions.
  
• Frontend leadership: design and deliver authentication UIs used by customers daily.
  
• Multidisciplinary teamwork: collaborate with mobile, backend, UX/UI, and QA experts.
  
• European impact: build solutions that will be rolled out across 20+ countries.