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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

My tech stack

From 
my 
blog, 
development 
insights. 

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

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, 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 React, Next.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.