Ramón Antonio Guzmán Beltrán
Senior Full Stack Developer | México
Full-stack developer with 18+ years of experience developing web applications. Skilled in MVC architectures and proficient with Angular, Node.js, NestJS, and SQL/NoSQL databases.
- JavaScript (ES6)
- TypeScript
- Angular (2-20)
- Vue (2,3)
- Nuxt 3
- Node.js
- Express
- NestJS
- C#
- .NET Core
- ASP.NET
- HTML5
- CSS3
- TailwindCSS
- PrimeVue
- Bootstrap
- Materialize
- Vuetify
- REST API
- WebSockets
- JWT
- SQL Server
- PostgreSQL
- MySQL
- Oracle
- MongoDB
- Git
- TFS
- TortoiseSVN
- Postman
- Insomnia
- Swagger
- CI/CD
- Photoshop
- Premiere
About Me
I love what I do — building technology that solves meaningful problems and improves lives. I bring a strong sense of responsibility, clear communication, and adaptability to every project, always striving for excellence without losing sight of the human side of software. Outside of work, I stay balanced through time with my family, exploring new places, riding motorcycles, listening to music, training, and diving into sci-fi stories that spark my imagination.
Information
Education
Bachelor's degree in Computer Science
- UAS
- 2003 - 2008
Work Experience
Senior Full Stack Developer
Freelance
multiservicios247.comMar 2025 - Present
- Leading end-to-end development of multiservicios247.com, a multi-tenant SaaS platform that digitizes complete automotive workshop management.
- Core modules: Customer/vehicle management, service history with photo evidence, and automated invoicing.
- ERP expansion: Integrated monthly expense tracking and complete employee payroll, transforming the platform into a full business management system.
- DevOps: Implemented CI/CD pipeline reducing deployment time by 70%.
- Architecture: Designed for scalability using MVC, JWT authentication, lazy loading, signals, and PostgreSQL migrations.
Stack: Angular 20, NestJS, PostgreSQL, TailwindCSS, TypeScript, JWT, REST API
Jan 2022 - Feb 2025
- Developed Flow, a live event and broadcast management platform with real-time notifications. Supported +500 concurrent users.
- Designed and optimized MongoDB views to improve query performance and efficiency.
- Reduced event configuration time by 40%.
- Migrated to Nuxt 3 (Vue 3), improving performance and maintainability.
Stack: Nuxt 3 (Vue 3), Node.js, Express, MongoDB, WebSockets, JWT
Jan 2020 - Dec 2021
- Developed an internal audit system with real-time notifications.
- Migrated legacy system, reducing technical debt by 30%.
- HR module for staff rewards and performance tracking.
- Task tracking system between managers and collaborators.
Stack: Angular 10, Node.js, Express, SQL Server, MongoDB, WebSockets, JWT
Nov 2018 - Jan 2020
- Developed NAS (New Azzule System) and ESB (Enterprise Service Bus) for agricultural financial services.
- Optimized SQL Server queries: 14s → 2s.
- JWT authentications and REST APIs.
Stack: Vue 2, .NET Core 2.1, C#, SQL Server, JWT, WebSockets
Feb 2017 - Sep 2018
- Developed HIS (Hospital Integrated System) for preventive and diagnostic health services.
- Integrated MongoDB for medical records and images.
- Reduced result consultation time by 50%.
Stack: .NET Core 2.1, SQL Server, MongoDB, TypeScript, WebSockets
Jan 2007 - Dec 2016
- Developed financial systems: SCF2 (Trust control, +1000 users), Jubicom (Complementary retirement), PFN (Off-payroll payment), UDEP (Participation units), Teachers Loans (Automatic interest calculation), GFD (Dependent funeral expenses).
Stack: .NET, C#, SQL Server, JavaScript, jQuery