Guillermo Hidalgo

1. 

   CVision

   Developing an AI-powered platform that analyzes a candidate’s CV against job descriptions to evaluate alignment and provide actionable improvement fee...

   Read more

   Stack

   Next.jsTypeScriptPrismaSupabaseClerkZodElevenLabsTailwind CSS

   Links

   GitHub

2. 

   Vaén

   Developing a full-stack e-commerce platform that provides product browsing, advanced filtering by price, size, and categories, and a modern responsive...

   Read more

   Stack

   NestJSNext.jsTypeScriptPrismaSupabaseStripeClerkTailwind CSSshadcn/ui

   Links

   Repositories (2)

3. 

   CoFund Collective

   Crowdfunding platform developed for Unicoop R.L. that enables organizations and entrepreneurs to propose projects and raise financial support from the...

   Read more

   Stack

   C#.NETASP.NET Web APIEntity FrameworkDapperSQL ServerASP.NET IdentitySignalRPayPal APIResendBootstrap

   Links

   Private project

4. 

   Animal Shelter Platform

   Full-stack web platform developed for an animal shelter to increase visibility, share their story, and facilitate community support. The application a...

   Read more

   Stack

   MongoDBExpress.jsNode.jsReactTypeScriptTailwind CSSJWT AuthenticationPayPal APIWhatsApp Integration

   Links

   Live demo

5. 

   Liquid Luxe

   Interactive landing page focused on modern motion design and immersive UI animations. The project explores fluid transitions, dynamic scroll-based eff...

   Read more

   Stack

   ReactTypeScriptViteGSAPTailwind CSS

   Links

   Live demo GitHub

1. Jan 2025 – Oct 2025

   Remote

   Open-Source Software Contributor

   OnlyDust

   • Contributed to Web3 open-source platforms by implementing new features and fixing critical bugs across multiple repositories.
   • Collaborated in full-stack development using TypeScript, Next.js, and NestJS, improving system performance and maintainability.
   • Refactored legacy code and applied clean architecture principles to improve scalability and readability.
   • Participated in pull request reviews and code integration, maintaining high quality and coding standards.
   • Worked in distributed international teams, improving collaboration and communication in remote environments.

2. Jul 2024 – Nov 2024

   Montes de Oca, Costa Rica

   Full-Stack Developer

   Asociación Voluntarios de Corazón

   • Designed and developed a full-stack web platform using the MERN stack (MongoDB, Express.js, React, Node.js) to manage pet adoption, reservations, and shelter operations.
   • Built and maintained a RESTful API using Node.js and Express.js, enabling secure and scalable client-server communication.
   • Implemented JWT-based authentication and authorization, ensuring secure user access and session management.
   • Developed an admin dashboard for managing users, pets, and reservations with role-based access control.
   • Integrated PayPal payment processing, automated email notifications, and WhatsApp messaging for real-time system events.
   • Optimized database queries and backend logic, improving performance and system reliability

3. Sep 2023 – Jul 2024

   San Pedro, Costa Rica

   Full-Stack Developer

   Unicoop R.L.

   • Developed a cooperative crowdfunding and management system handling users, financial transactions, and member data.
   • Built backend services using .NET Core and ASP.NET Web API, implementing scalable and maintainable architecture.
   • Implemented secure authentication and role-based access control (RBAC) for financial and administrative operations.
   • Integrated Dapper ORM for high-performance data access and execution of SQL Server stored procedures.
   • Designed and optimized relational database structures using Microsoft SQL Server, improving data integrity and query performance.
   • Led development lifecycle including architecture design, development, testing, and deployment.

4. Nov 2022 – Jun 2023

   San Pedro, Costa Rica

   IT Support

   La Catalina R.L.

   • Co-developed a secure voting and revenue tracking system using .NET Core, improving transparency in internal operations.
   • Participated in system design, testing, and implementation aligned with business and technical requirements.
   • Provided IT support and troubleshooting, reducing downtime by approximately 40% during system rollout.
   • Helped digitize internal decision-making processes, improving efficiency and data accuracy

3.1Education

1. May 2025 – Sep 2025

   San José, Costa Rica

   Ethereum Developer Pack

   CENFOTEC University

2. Jan 2022 – Mar 2025

   San José, Costa Rica

   Bachelor’s Degree in Computer Systems Engineering

   Fidelitas University