Programador full stack React & .NET (Senior)

ALPHABET CONSULTING; Madrid; Presencial; EUR 60.000 - 90.000; Jornada completa

Descripción de la vacante

Alphabet Consulting is seeking a Senior Full Stack Developer to advance an intranet platform used across an international hospitality group. You will collaborate with Product Owners, UX/UI designers, and QA engineers to deliver scalable architectures and robust integrations with Microsoft 365 ecosystem.

The role focuses on API design in .NET, frontend work in React, and Azure-based DevOps practices, with emphasis on code quality through Jest/Cypress tests and AI-assisted tooling.

Formación

• 4-5 years in Full Stack or Backend software development (minimum 3 years with .NET).
• Experience with .NET / ASP.NET Core + React SPA.
• Experience with Microsoft Graph, SharePoint Online, and Azure AD / Microsoft Entra ID.
• Proficiency with relational databases (MySQL).
• Experience with testing frameworks (Jest, React Testing Library, Cypress).
• Knowledge of Agile environments (Scrum/Kanban) and Git version control.
• English proficiency is required.

Responsabilidades

• Design, develop, and maintain RESTful APIs in .NET / ASP.NET Core following modern design patterns (Clean / Hexagonal Architecture).
• Develop reusable UI components using React patterns (Hooks, Context) and manage state to connect with backend APIs.
• Integrate with Microsoft Graph, SharePoint Online, and handle authentication/authorization via Azure AD / Microsoft Entra ID.
• Model relational data and optimize queries in MySQL.
• Work in Microsoft Azure environments, support CI/CD pipelines, and conduct frontend/backend testing (Jest, Cypress); explore AI-assisted coding tools.

Conocimientos

Full stack development

English proficiency

Agile methodologies

RESTful API design

Frontend development

Backend development

Herramientas

.NET

React

MySQL

Azure

Git

Jest

Cypress

SharePoint Online

Microsoft Graph

Azure AD / Entra ID

Descripción del empleo

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 applying Artificial Intelligence (AI) to software development workflows.