Banner Image

Skills

  • API Development
  • App Development
  • Back End Development
  • E Commerce
  • Front End Development
  • Programming
  • SaaS
  • Software Development
  • Startup Consulting
  • Web Development
  • Web Hosting
  • Web Management
  • Web Servers

Services

  • Full-Stack Web Development

    $25/hr Starting at $100 Ongoing

    Dedicated Resource

    I'm a Full-Stack Developer with 5+ years of experience building fast, secure, and scalable web applications for startups and enterprise clients. I specialize in React, Node.js, Express, PostgreSQL, Tailwind...

    API DevelopmentApp DevelopmentBack End DevelopmentE CommerceFront End Development

About

Expert Full-Stack Developer | AI, Fintech & Web3 Specialist | MERN | React | Node | PostgreSQL | Scalable Systems & Custom Solutions

I'm Guilherme Sanazaria, a Senior Full-Stack Developer with 5+ years of experience delivering high-performance web applications, specializing in AI integrations, Fintech platforms, and Web3 technologies. I’m highly skilled in the MERN stack (React, Node.js, Express, MongoDB/PostgreSQL) and have led complex projects involving cloud migration, performance optimization, and API integrations.

I build scalable, secure, and responsive systems tailored to clients' goals — whether it's a SaaS dashboard, a fintech rewards app, or a smart data-driven backend.

Expertise:
- React, Vite, TailwindCSS
- Node.js, Express, PostgreSQL
- AI APIs (OpenAI, Anthropic)
- Web3, Blockchain integration
- RESTful/GraphQL APIs
- Terraform, Oracle Cloud (OCI), AWS

Let’s build something powerful together!

Work Terms

- Available for both short-term tasks and long-term collaborations
- Flexible hours based on project needs (Time zone: São Paulo, GMT-3)
- Communication via Guru messages, Slack, Zoom, or preferred tools
- Payment terms: Prefer milestone-based or weekly payments
- All work is 100% original, NDA-friendly, and client-confidential