Ariel Itzli Molina Sánchez

Frontend Tech Lead & Architect

Crafting scalable digital platforms with the resilience of obsidian and the precision of code.

I help teams ship faster by designing frontend infrastructures that are modular, maintainable, and built for scale.

Professional Journey

I'm a Frontend Tech Lead and Architect with over 8 years of experience building modular and scalable UI systems. My work focuses on frontend architecture, design systems, and developer experience (DX).

At EFEX, I lead the frontend infrastructure, where I architect microfrontend-based platforms using Nx, React, and internal tools I've developed for release automation, quality control, and design token management.

My passion is crafting consistent, reusable experiences through thoughtful code, clear structure, and strategic componentization.

Experience

2025 — Present

Frontend Tech Lead @ EFEX

Lead frontend architecture, design systems, and developer tooling at EFEX. Focused on scalability, code reuse, and engineering best practices.

  • React
  • TypeScript
  • Nx
  • Module Federation
  • Material UI
  • Storybook
  • Zustand
  • Vite
  • Architected and standardized the entire frontend infrastructure using Nx and Module Federation
  • Built internal libraries for design tokens, theming, components, HTTP handling, and error management
  • Developed an internal CLI to automate changelogs, QA, releases, and branching workflows
  • Led cross-team architecture decisions, documentation efforts, and code reviews
2023 — 2025

Senior Frontend Engineer @ EFEX

Developed and maintained scalable interfaces and internal tooling across EFEX platforms. Focused on UI quality, reusable code, and developer efficiency.

  • React
  • TypeScript
  • Material UI
  • React Hook Form
  • Zustand
  • Helped build EFEX's shared component library from scratch
  • Collaborated with cross-functional teams to deliver robust and accessible user experiences
  • Laid the groundwork for internal tools that evolved into company-wide CLI solutions
2022 — 2024

Senior Frontend Engineer @ Branch

Contributed to two frontend verticals (Advertiser Dashboard and Customer Platform) under a shared architecture. Focused on modularity, scalability, and UX consistency.

  • React
  • TypeScript
  • Tailwind CSS
  • React Hook Form
  • Zustand
  • Built a visual analytics dashboard with complex data visualizations
  • Developed role-based management views and improved onboarding experiences
  • Delivered reusable components and frontend utilities across teams
  • Aligned technical priorities with product and business needs
2021 — 2022

Frontend Lead @ Globant (American Century Investments)

Led frontend development for enterprise-grade financial applications, building from scratch and supporting cross-team design system adoption.

  • React
  • JavaScript
  • Redux
  • Material UI
  • SASS
  • Next.js
  • Built a product from scratch with REST API integration and dynamic views
  • Designed and maintained a company-wide design system
  • Created a marketplace platform with role-based search and filters
  • Supported other teams in adoption of the design system
2019 — 2022

Chief UX Officer / Frontend Developer @ Minds With Purpose Ltd

Led UX and frontend implementation for educational and social impact platforms, with a focus on accessibility, inclusive design, and performance.

  • React
  • SASS
  • BEM
  • Stripe
  • OpenTok
  • Built responsive SPAs with complex onboarding and search filters
  • Integrated real-time video chat and Stripe payments
  • Designed admin panels and control dashboards
  • Improved UX through usability audits and enhancements
2020 — 2021

Frontend Developer @ RAO File Viewer

Built a secure file viewer application with advanced editing and encryption features.

  • Angular
  • TypeScript
  • SASS
  • RxJS
  • cryptoJS
  • Implemented encrypted login and file decryption workflows
  • Enabled in-view editing with zoom, rotation, and scaling
  • Developed a custom calendar interface for file filtering
2019 — 2020

Frontend Lead @ ATOMS Ecommerce

Led frontend efforts for multiple e-commerce stores, implementing scalable workflows and project templates.

  • React
  • Liquid
  • SASS
  • Bootstrap
  • VTEX
  • Shopify
  • Created Git-based standards for team collaboration and repo management
  • Built custom storefronts tailored to client needs
  • Fixed critical bugs and enhanced store performance
2018 — 2020

Frontend Developer @ ZERMAT USA

Supported the migration and feature development of internal platforms for sellers.

  • React
  • AngularJS
  • Migrated legacy systems from AngularJS to React
  • Built internal microsites for business operations
  • Improved performance and usability of seller platforms
2016 — 2018

Frontend Lead / Developer @ Digimundo Technologies

Delivered custom enterprise web solutions based on client requirements, transitioning from developer to team lead.

  • HTML
  • CSS
  • JavaScript
  • Led project planning and client communication for new software initiatives
  • Developed internal tools to support business operations
  • Gathered and analyzed requirements to deliver tailored solutions