Alexandre Alvarenga

Senior Frontend Developer

React · Next.js · TypeScript · Node.js

Professional Summary

Senior Frontend Developer with 6+ years of experience building scalable React and Next.js applications. Experienced with TypeScript, Node.js, REST APIs, Shopify, Contentful, LaunchDarkly, CI/CD, Jest, analytics dashboards, ingestion pipelines, Firebase integrations, and frontend architecture.

Passionate about building maintainable software and collaborating with cross-functional teams.

Professional Experience

Senior Frontend Developer

Jan 2024 — Present

Guillermo Camargo Ltda.

Develop production-grade Next.js applications, reusable component systems, analytics dashboards, backend integrations, Firebase-powered features, Node.js services, CI/CD improvements, A/B testing with LaunchDarkly, Shopify and Contentful integrations, and architectural improvements across international e-commerce platforms.

Frontend Developer

Jan 2022 — Jan 2024

Bunnies Holes

Built React applications with Redux, REST APIs, responsive interfaces, and reusable components while collaborating in an Agile environment and participating in code reviews.

Frontend / Full Stack Developer

May 2019 — Jan 2022

Freelancer

Delivered custom React and Node.js applications using Express, MongoDB, REST APIs, and Bootstrap.

Selected Projects

PromoBet

Proprietary Product

Founder / Product Engineer

Designed and developed a proprietary affiliate marketing platform focused on gamified product discovery.

  • Architected the frontend with React and the backend with Node.js.
  • Built CSV and JSON product ingestion pipelines.
  • Implemented analytics dashboards and seasonal statistics.
  • Developed Firebase integrations and product catalog management.
  • Designed scalable data processing workflows.
Visit project →

Real Time Gradient

Open Source

Founder / Open Source Developer

Designed and developed a framework-agnostic JavaScript library for creating smooth, customizable, real-time gradients.

  • Built a runtime API for dynamic gradient state and visual effects.
  • Implemented linear and radial gradient support.
  • Added runtime transitions, scheduled gradients, and temporary effects.
  • Published TypeScript typings and npm package support.
  • Designed the library to work independently of frontend frameworks.
Visit project →View repository →

Core Technologies

ReactNext.jsTypeScriptJavaScriptNode.jsExpressTailwind CSSHTML5CSS3ShopifyContentfulLaunchDarklyFirebaseMongoDBMySQLJestGitCI/CDDockerREST APIsAnalyticsFrontend ArchitecturePerformance OptimizationAccessibilityAgile / Scrum