Websites and Landing Pages
Fast, responsive pages built to convert. Custom web design, a strong experience on every screen, and accessibility from the start.
- High performance
- Web design
- Conversion optimized
Full Stack Developer & AI Builder · Maringá, Paraná, BrazilAndrey
Andrey
Santos
I build web applications, e-commerce stores, automations, and AI agents. I have led technical teams as Head of Development and CTO while staying hands-on.
Full Stack & AI Builder
About me
Hi, I’m Andrey
I am 21 years old and originally from São Paulo. I now live in Sarandi, in the Maringá metropolitan area of Paraná.
I work with full-stack web development using React, TypeScript, Next.js, Node.js, and Python. Recently, I have focused on automations and AI agents with n8n, LangGraph, RAG, tool calling, and MCPs.
In just over a year and a half, I went from junior developer to CTO, passing through Head of Development. I led technical teams, defined standards, and structured delivery processes without leaving the operation.
Maringá, Paraná, Brazil
What I do
What I build
The areas I work in every day, from front-end to the agent layer.
Experience
From code to results
From developer to CTO in just over a year, while staying hands-on.
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Full Stack Developer
CurrentAutônomo · Jul 2026 · Present
I create digital solutions for companies, focused on websites, landing pages, online stores, custom systems, automations, and AI agents.
Web development, API integrations, e-commerce, and custom solutions for different business needs.
I help companies build a more professional digital presence, optimize processes, and turn ideas into functional, well-structured solutions ready to use.
Certifications
- Hugging Face: AI Agents Course (Fundamentals + Completion)
- Hugging Face: Fundamentals of LLMs
- Nuvemshop Partners Academy
- Coursera: Google IT Support (Technical Support Fundamentals)
- Coursera: Google (The Bits and Bytes of Computer Networking)
- Udemy: Building Systems with PHP and MySQL in Practice
Portfolio
Selected projects
Products and projects that made it from idea to production.
FoxLead
CRM for WhatsApp Web
MV3 Chrome extension for sales organization inside WhatsApp Web: kanban, labels, reminders, quick messages, automations, follow-ups, Google Calendar integration, and AI features.
- Chrome MV3
- CRM
Onboarding Automatizado
n8n process automation
Automation built to structure PixelOps onboarding: organizes contracts in Drive, registers clients in ClickUp, and feeds an NPS and remarketing base. Includes failure monitoring with Telegram and WhatsApp alerts.
- n8n
- ClickUp
- Google Workspace
Radar NEXO
Weekly newsletter written and audited by AI
Autonomous editorial system that researches news, selects topics, and produces a weekly newsletter. NEXO writes and analyzes while CRIVO audits sources, facts, and opinions before publication.
- n8n
- Agentes de IA
- Automação
Dashboard Meta Ads
Performance hub for agencies
Internal platform built for Scala Digital to centralize Meta Ads metrics, track clients individually, and automate weekly WhatsApp reports.
- React
- n8n
- Supabase
- Meta Ads
SpecDD Starter Pack
Toolkit for Spec-Driven Development
Lean npm-installable toolkit for organizing projects with AI agents, combining documentation, governance, agent context, and specification-driven workflows.
- Claude
- Codex
- Opencode
Onze Lendas
Football draft game
Draft game focused on interactive experience, squad building, and competition modes inspired by football tournaments. Client-side SPA deployed on Vercel.
- React 19
- TypeScript
- Vite
Bella Donna Imports
E-commerce · Nuvemshop
Online store built with Nuvemshop to organize a perfume catalog and provide a responsive shopping experience.
- Nuvemshop
- E-commerce
- Design responsivo
versão em 12-08-2026¹
View announcementFAQ
Frequently asked
What people usually ask before starting a project with me.
Who is Andrey Santos?
Andrey Santos is a full-stack developer and web designer based in Maringá, Paraná. In just over a year and a half he went from developer to CTO, and today builds websites, landing pages, online stores, custom systems, automations, and AI agents for companies across Brazil.
What services do you offer?
Websites and landing pages, web design, online stores with Nuvemshop, Shopify, and WooCommerce, custom systems such as dashboards and CRMs, n8n automations, and production-ready AI agents.
Do you work with companies outside Brazil?
Yes. I work remotely with companies in Brazil and internationally.
How much does a professional website cost?
It depends on the scope: a landing page is simpler than a full online store or custom system. Estimates are free and commitment-free — just send me a message describing the project.
What is the difference between a web designer and a web developer?
A web designer handles the site’s appearance and experience: layout, colors, typography, and usability. A web developer implements everything in code, focusing on performance, security, and integrations. I work across both sides, from interface design to end-to-end development.
Contact
Open to new opportunities
If you are building a team, evaluating a profile, or just want to talk about development, LLMs, AI agents, or related topics, reach out. I usually reply within a few hours.