Vinicius Aguiar
01About

About me

A bit about my journey, skills and interests.

Senior Product 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 165+ 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.

02Experience
  1. Jul 2026 — present · Full-time · RemoteCurrent

    Product Engineer · Chattie

    ReactNext.jsTypeScriptAnthropic ClaudeVercel AI SDK

    Working directly on the evolution of the frontend of an AI outreach platform used by 165+ 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

    Full Stack Developer · 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. Apr 2025 — Jul 2026 · Contract · São Paulo, Brazil · Remote

    Senior Software Engineer · Aguiar Labs

    ReactNext.jsReact NativeExpoNestJSPostgreSQLPrisma

    Contract engineering for marketplace, fleet management and transaction-based platforms in production, owning delivery end-to-end: architecture, implementation, deployment and support.

    Hora Útil: Firestore → PostgreSQL with zero downtime

  4. Apr 2025 — Jun 2025 · Full-time · Hybrid

    Software Engineer · Easytogo

    ReactNext.jsReact NativeFlutter

    Web and mobile development for delivery, logistics hubs, dropshipping, CRM, loyalty and product catalog applications.

  5. May 2024 — Apr 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.

  6. Feb 2022 — May 2024 · Self-employed

    Founding Engineer · Stealth Startup

    ReactReact NativeNode.js

    Prototyped a delivery application, web and mobile, from architecture through implementation, while studying Systems Analysis and Development.

03Skills

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
04Tech Stack
ReactReact NativeNext.jsNode.jsNestJSTypeScriptHTML5CSS3TailwindPostgreSQLMongoDBFirebaseDockerKubernetesAWSGitSwift (iOS)FlutterGoJavaCI/CDTestingAccessibilityDesign SystemLinux/macOS
05Core 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
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