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Carlos Dubón

Hey 
I’m 
Carlos. 
Welcome 
to 
my 
slice 
of 
the 
web! 

I’m a Frontend Engineer with 5+ years of experience, known for pixel-perfect execution and strong attention to small details.

Skilled in Next.js, React, TypeScript, and modern front-end technologies; building high-quality, user-centric web and mobile applications.

Carlos

Carlos Daniel Dubón

Senior Frontend Engineer at KEMIK.com

Guatemala
00:00
[redacted]
[redacted]

My tech stack

From 
my 
blog, 
development 
insights. 

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Blog post image

Understanding loading states in Tanstack Query v5.

Apr 6, 2026
By Carlos Dubón
A guide to isLoading, isPending, and isFetching in Tanstack Query v5

My coding activity

Experience 
that 
speaks 
for 
itself. 

My work history

KEMIK.com

Senior Frontend Engineer

Oct 2023 - Present

Developed Guatemala’s leading e-commerce platform from the ground up, focusing on performance, SEO, and user experience.

  • Built the frontend using Next.js, React.js, TypeScript, TailwindCSS, and TanStack Query, enhancing functionality and responsiveness.
  • Implemented SEO optimization strategies to enhance search engine rankings, achieving a high Core Web Vitals score.
  • Used bare React Native to build the mobile app, ensuring enhanced control over performance and architecture.
  • Built core functionalities from the ground up, prioritizing performance and minimizing dependency on third-party libraries.

Yalutec

Lead Frontend Engineer

Feb 2023 - Sep 2023

Lead Frontend Engineer for MigoPayments, a hosted checkout platform similar to Stripe Checkout, enabling merchants to offer multiple payment methods via a secure checkout flow for brands such as McDonald’s, CMI, CBC, Coppel, and Elektra.

  • Built a scalable, high-performance checkout application using Next.js, React.js, TypeScript, and TailwindCSS, supporting multiple payment methods (cards, installments, PayPal, SINPE Móvil, and cash-based options).
  • Architected and implemented end-to-end payment flows, including transaction handling, secure data collection, and 3D Secure (3DS) authentication across multiple providers.
  • Integrated payment processors such as Visa Cybersource, Adyen, and PayPal, ensuring PCI DSS-compliant transactions and reliable processing.
  • Optimized performance and user experience at the final step of the purchase journey, improving checkout reliability and conversion across multiple merchants and industries.

Pentcloud

Lead Frontend Engineer

Aug 2021 - Jan 2023

Lead Frontend Engineer for Jequi, an HR and people management platform designed to help companies manage employee performance, engagement, and organizational structure.

  • Built and architected the frontend from the ground up using Next.js, React.js, TypeScript, TailwindCSS, and GraphQL, ensuring scalability and maintainability.
  • Built employee management, org charts, and performance review workflows (including 360° reviews and feedback).
  • Reduced load times and improved responsiveness across data-heavy interfaces through optimized data fetching and state management.
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Have any questions?
Feel free to contact me.
Whether you’re looking to collaborate, or just want to connect, I’m always open to discussing ideas and building thoughtful, user-focused experiences.