JM/

Jherson Martelo Medina / Medellín, Colombia

FrontEndDeveloper

6+ years building product systems where interface engineering, visual craft, and international collaboration meet.

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A working set of tools and practices I use to turn product ideas into clear, maintainable web experiences.

Experience

2025 — Present

Yourway Learning

Technologies

Chakra UI · Storybook · Jest · Convex · NestJS · Tiptap

Selected contributions

  • Owned the Chakra UI design system repository with Storybook and Jest.
  • Led the Chakra v2 to v3 migration while preserving accessibility standards.
  • Built virtual classroom interactions, analytics charts, and AI video suggestions.

2022 — 2025

Nexer Group

Technologies

WordPress · React · PHP · Tailwind CSS · WP Engine · PostHog

Selected contributions

  • Owned a custom WordPress plugin with React Gutenberg blocks and Tailwind CSS.
  • Replaced manual FileZilla deployments with Bitbucket Pipelines.
  • Built AI content and resume-screening tools during internal hackathons.

2021 — 2022

Koombea

Technologies

React · Redux · Chakra UI · Nivo · SASS · esbuild

Selected contributions

  • Proposed and led the migration from Webpack to esbuild.
  • Developed Nivo data visualizations for education stakeholders.
  • Led React, Redux, Chakra UI, and SASS decisions with UI designers.

Jan — Jul 2019 · Feb 2020 — Apr 2021

Pragma

Technologies

Angular · React · Redux · Material UI · PWA · Camunda

Selected contributions

  • Progressed from software developer intern to frontend developer across two engagements.
  • Built Angular and React products with PWA patterns, Redux, Material UI, AWS APIs, and Camunda.
  • Improved Angular performance by over 30% through Lighthouse audits, targeted fixes, and lazy loading.

Jul 2019 — Jan 2020

VICO

Technologies

React · Laravel Blade · UX research · User testing · Data analysis

Selected contributions

  • Shipped React and Laravel Blade features through a company-wide rebrand.
  • Improved load times and navigation to strengthen performance and usability.
  • Ran feature tests, user feedback sessions, and data analysis to guide UX decisions.