About the Role:
We are looking for a Senior Full Stack Developer to drive the ongoing evolution of a corporate intranet platform used by multiple business units across an international hospitality group.
You will work closely within a multidisciplinary team (Product Owner, UX/UI Designers, QA Engineers) to build robust, scalable solution architectures, develop RESTful APIs, and deliver seamless integrations with Microsoft 365, SharePoint, and Azure .
Responsibilities:
Backend & Architecture: Design, develop, and maintain RESTful APIs in .NET / ASP.NET Core following modern design patterns (Clean / Hexagonal Architecture).
Frontend (React SPA): Develop reusable UI components using modern React patterns (Hooks, Context), implement state management, and integrate client-side components with backend APIs.
Microsoft Ecosystem Integrations: Integrate with Microsoft Graph, SharePoint Online , and handle authentication/authorization via Azure AD / Microsoft Entra ID .
Data Management: Model relational data and optimize queries in MySQL .
DevOps, Quality & AI:



Work in Microsoft Azure environments, support CI/CD pipelines, execute frontend/backend testing (Jest, Cypress), and leverage AI-powered coding tools (GitHub Copilot, Claude Code, etc.).
Requirements:
Experience: 4-5 years in Full Stack or Backend software development (minimum 3 years with .NET ).
Core Stack: .NET / ASP.NET Core + React SPA.
Microsoft Ecosystem: Microsoft Graph, SharePoint Online, and Azure AD / Microsoft Entra ID.
Databases: Relational databases, specifically MySQL.
Testing: Experience with testing frameworks (Jest, React Testing Library, Cypress) and writing maintainable unit/integration tests.
Methodologies: Agile environments (Scrum/Kanban) and version control with Git.
Languages: English proficiency is required.
Nice to Have:
Experience building corporate intranets, employee portals, or complex business systems.
Familiarity with microservices or modular monolith architectures.
Hands-on experience

📌 Programador full stack React (Madrid)
🏢 Alphabet Consulting
📍 Madrid