Vinicius Aguiar

About me

A bit about my journey, skills and interests.

Vinicius Aguiar

Frontend Engineer with a product mindset, specialized in building fast, scalable web and mobile applications with React, Next.js and React Native — focused on performance and user experience.

At Chattie, I work directly on the evolution of the frontend of an AI outreach platform used by 100+ companies. I rebuilt the main inbox (~20,000 records per workspace) with cursor-based pagination and list virtualization — cutting the initial payload from ~6.7 MB to ~19 KB (~400x) and eliminating UI freezes.

Full-stack range as a differentiator: payment integrations, multi-tenant architecture, AI systems (Anthropic Claude, Vercel AI SDK) and cloud delivery (AWS, CI/CD) — always operating real SaaS products in production.

Skills

  • React, Next.js, TypeScript
  • React Native, Node.js, Flutter, Swift (iOS)
  • HTML5, CSS3, Tailwind, Design System
  • REST API integrations, authentication and payment flows
  • Testing, performance and production readiness

Interests

  • User Experience and accessibility
  • Frontend architecture and performance
  • AI applied to digital products

Experience

  1. Jul 2026 — present · Full-time · RemoteCurrent

    Product Engineer (Frontend) · Chattie

    ReactNext.jsTypeScriptAnthropic ClaudeVercel AI SDK

    Working directly on the evolution of the frontend of an AI outreach platform used by 100+ companies, focused on performance, scalability and user experience.

    Inbox: payload ~6.7 MB → ~19 KB (~400x)

  2. Nov 2025 — Jul 2026 · Contract · Minas Gerais, Brazil · Remote

    Mid-level Software Engineer · Holy Solutions

    ReactNext.jsReact NativeAWSAsaas

    Development of web and mobile applications using React, Next.js and React Native, focused on building scalable interfaces and user-centric experiences.

  3. Aug 2025 — present · Part-time · RemoteCurrent

    Software Engineer · Vox Pet Digital

    ReactNext.jsNode.jsTypeScriptPostgreSQLOpenAI

    Software Engineer at Vox Pet Digital (SaaS for pet shops and veterinary clinics), contributing directly to product evolution across core business modules.

  4. Apr 2025 — Jan 2026 · Full-time · São Paulo, Brazil · Remote

    Software Engineer · Stack Labs

    ReactNext.jsReact Native

    Development of web and mobile applications for different clients, delivering scalable and high-performance interfaces with React, Next.js and React Native.

  5. May 2025 — Nov 2025 · Contract · São Paulo, Brazil · Remote

    Software Engineer · MovePro

    ReactNext.jsReact NativeExpoStripeFirebase

    Contributed to end-to-end development of the MovePro platform (web + mobile), building critical interfaces used by thousands of users and leading key integrations.

  6. May 2024 — Jun 2025 · Hybrid

    Web Developer / Mobile Developer · Easytogo

    ReactNext.jsReact NativeFlutter

    Development of responsive web and mobile interfaces using React, Next.js, React Native and Flutter in an agile and product-oriented environment.

Tech Stack

ReactReact NativeNext.jsNode.jsTypeScriptHTML5CSS3TailwindPostgreSQLDockerAWSGitSwift (iOS)FlutterGoJavaCI/CDTestingAccessibilityDesign SystemLinux/macOS

Core Concepts

  • Frontend performance — cursor-based pagination, list virtualization and payload optimization
  • SaaS Architecture and production-ready system design
  • REST APIs, system integrations, authentication and payment services
  • AI Agents and automation workflows integrated into real products
  • Cloud delivery with AWS, CI/CD pipelines and containerized services
  • Testing strategy, reliability, performance and usability
  • Agile execution with Scrum/Kanban and iterative product cycles

Featured Projects

  • Vox Pet Digital — SaaS platform for pet shops and veterinary clinics focused on scheduling, customer management and digital services.
  • X-Drop — solution for e-commerce automation and marketplace integrations focused on operational efficiency.

Contact