Freelancer profile translated to English.

Description

Specialized developer in building scalable platforms using React for frontend and .NET for backend, with real experience in robust backend development and AWS deployment.

I have participated in developments such as a virtual classroom with thousands of daily real-time interactions, WebSockets, and cloud architectures.

My focus is on creating solutions that scale, are maintainable, and deliver value from the first sprint.

Key Technologies: React.js, .NET, PostgreSQL, AWS, Docker, CI/CD, Javascript, C#, TypeScript.

If you are looking for a developer who not only writes code but improves your product and accelerates your deliveries, let's talk.

Industry field of expertise

Languages

Spanish
Native or bilingual
Catalan
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Barcelona (up to 50km)

TUS MEDIA
Full Stack Developer
EDUCATION AND E-LEARNING
December 2023 - February 2026 (2 years and 2 months)
Barcelona, Spain
I participated in the development of a virtual classroom platform with over 11,000 active daily sessions and thousands of concurrent users, integrated with many real-time events and artificial intelligence (OpenAI API).

Responsibilities and achievements:
Design and implementation of backend APIs in .NET.
Development of real-time API using WebSockets with Node.js (Express).
Frontend architecture in React.js optimized for high volume of concurrent users.
Integration of AI-based services using OpenAI API and Python.
Containerization of services with Docker.
Participation in architecture decisions oriented towards scalability and performance.
.NET React.js AWS Docker OpenAI API
NTTDATA
Full Stack Developer
PUBLIC SECTOR
June 2021 - November 2023 (2 years and 5 months)
Barcelona, Spain
Development of web applications for public health entities, I also led a team of 4 developers on a project for public administration focused on APIs and secure systems.

Responsibilities:
Design and development of REST APIs with Java (Spring Boot) and .NET.
Design and development of portals with React.js
Relational database modeling in MySQL.
Security implementation with OAuth2 and encryption.
Technical coordination and code review of the team.
Integration with external services and third-party APIs.
.NET PostgreSQL React.js Team Leadership Programmer Analyst
CESC-IT
Backend developer
FASHION AND COSMETICS
November 2020 - March 2021 (4 months)
Barcelona, Spain
Development of backend services and REST APIs for enterprise applications.
Implementation of business logic.
Development of REST APIs in Java with Spring Framework Using MySQL
Design, writing, and implementation of APIs. Implementation of encryption strategies and security measures
Design and implementation of database models.
Spring boot Spring Security API SQL React.js

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Signup to reveal

Web Application Development
Institut Pedralbes
2021
Desarrollo de Aplicaciones Web
Cross-Platform Application Development
Institut Pedralbes
2020
Desarrollo de Aplicaciones Multiplataforma

Check out Joel's education

Joel Iglesias Jimenez

Full Stack Developer | React.js · ASP.NET Core C#

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