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Gustavo Braga
pten

Front-End Developer

Gustavo Braga

I build SaaS products, AI-powered experiences, and scalable data interfaces — with technical decisions aligned to business goals.

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About

About me

SaaS, AI, and data platforms — from deep product understanding to production delivery.

Front-End Developer with experience building SaaS applications, AI-powered products, data platforms, and complex enterprise interfaces. Specialized in React, Next.js, and Vue, with work across real-time systems, frontend architecture, and scalable data-driven applications.

Passionate about performance and user experience, I start new projects by deeply understanding the product, its users, and its market — so technical decisions stay aligned with business goals.

Experience
5+
Core stack
React
English
Advanced

Stack

Tools & technologies

From frontend to infrastructure — React, Next.js, Vue, real-time systems, AI, and data visualization.

Frontend

  • React
  • Next.js
  • Vue 2/3
  • TypeScript
  • JavaScript
  • Tailwind CSS

Backend & APIs

  • Supabase
  • Edge Functions
  • RLS
  • Node.js
  • REST APIs

Data & Infra

  • PostgreSQL
  • Redis

State & Data

  • TanStack Query
  • Pinia
  • Zustand

Real-time

  • Socket.IO
  • WebRTC

AI & Automation

  • OpenAI API
  • n8n
  • Zapier

Visualization

  • Chart.js
  • Recharts
  • Leaflet
  • Turf.js

Testing & Tools

  • Vitest
  • Bruno
  • Git

Projects

Selected work

Personal products focused on AI, data, and user experience. Repositories are private because they rely on non-public APIs.

Music AI — captura 1
Music AI — captura 2

Music AI

Full-stack platform for music catalogs with integrations to Cifra Club, Letras, and YouTube. Includes an AI-powered Studio that extracts chords from sheet images, plus collaboration, playlists, and customizable themes.

  • Next.js
  • TypeScript
  • Supabase
  • n8n
  • Tailwind
Want to know more? Get in touch
ControlaAI — captura 1
ControlaAI — captura 2

ControlaAI

Personal finance SaaS that unifies expenses, subscriptions, installments, and financial indicators in one dashboard. Natural-language expense entry and a contextual financial assistant powered by OpenAI.

  • Next.js
  • React
  • Supabase
  • OpenAI
  • Tailwind
Want to know more? Get in touch

Career

Experience

SaaS products, data platforms, and international teams — from code to stakeholder delivery.

  1. Jan 2023 — Present

    Front-End Developer

    Opens Tecnologia · Hybrid — Florianópolis

    Led frontend development across multiple AI-powered SaaS products, including Lucy — a diagnostic platform that automatically generates executive presentations and strategic reports through conversational AI.

    • Continuously shipped features and scalable experiences with React, Vue 3, TypeScript, and Supabase.
    • Built CRM and omnichannel communication modules (Inbox, CDP, WebRTC dialer, campaigns, and analytics dashboards) with Socket.IO, TanStack Query, and Pinia.
    • Evolved frontend architecture through reusable component libraries, Vue 2 → Vue 3 migration, real-time systems, RLS, and Edge Functions.
    • Automated business workflows with n8n and Zapier; collaborated closely with PMs, design, and clients from Figma prototypes.

  2. Feb 2025 — Apr 2026

    Full-Stack Developer (Freelance)

    EC Data · Remote — Florianópolis

    Joined the company's core transportation intelligence platform from inception, designing and implementing frontend and backend architecture with Next.js, Supabase, PostgreSQL, and Redis.

    • Built analytical dashboards and reporting for aviation and rail, consolidating public data sources including ANAC.
    • Developed geospatial analysis with Leaflet, Turf.js, and Voronoi; shipped a no-code reporting platform with drag-and-drop.
    • Designed secure APIs, RBAC, Power BI integrations, and custom modules for enterprise clients.
    • Platform launched and presented at Intermodal South America 2025.

  3. Jul 2025 — Aug 2025

    Front-End Developer (Freelance)

    Cape · Remote — New York

    Built the Connector Pages and Super Connectors modules, enabling users to navigate multi-level relationship networks and scale strategic introductions.

    • Stack with Next.js, React, TypeScript, Prisma, Zod, Zustand, and Turborepo.
    • Pixel-perfect interfaces from Figma, in daily collaboration with the Product Designer.
    • Fully English-speaking international engineering environment with code reviews and architecture decisions.

  4. Jul 2022 — Jan 2023

    Apprentice

    Intelbras · On-site — Florianópolis

    First professional experience building products and user interfaces, contributing to the Mibo Cam project and UX prototyping in Adobe XD.

    • Supported security camera testing and collaborated in English with partners from China.

Education

High School Integrated with a Technical Degree in Systems Development

SENAI/SC · Feb 2021 — Dec 2023

Technical education focused on software development, web technologies, databases, computer networks, and object-oriented programming.

Contact

Let's build the next product

Open to opportunities, freelance work, and collaborations on SaaS, AI, and data platforms. Reach out.

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