Web Development
Applications, dashboards, internal systems, websites, and landing pages built around what each project actually needs.
- React
- TypeScript
- Next.js
- Node.js
- PostgreSQL
- Python
Full Stack · Automation · Integrations · Martech · Maringá, Paraná, BrazilAndrey
Andrey
Santos
I build web applications, automations, and integrations that connect product, marketing, and operations.
I work with React, TypeScript, Node.js, PostgreSQL, n8n, APIs, e-commerce, and AI solutions for digital operations.
Full Stack · n8n · AI
About me
Hi, I’m Andrey
I am a Full Stack developer building my career through work in web development, e-commerce, automations, integrations, and technical leadership.
Much of that path happened inside a digital marketing agency, where I started as a developer and went deeper into n8n, APIs, and automations to connect systems, reduce manual work, and improve the operation’s processes.
Today I work mainly with automations, integrations, web development, e-commerce, and AI solutions, including agents and automated workflows.
I also partner with agencies and media buyers, developing solutions for digital marketing operations, data integration, Meta Ads dashboards, and report automation.
I especially enjoy understanding business problems and using technology to find practical solutions. I still have a lot to learn, and it is exactly that combination of curiosity, adaptability, and building that I want to keep developing.
Maringá, Paraná, Brazil
What I do
What I build
Building and integrating digital solutions, combining development, automation, and technology applied to the business.
Experience
Hands-on experience
Development, e-commerce, automations, and integrations, plus the chance to lead a small development team.
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Full Stack Developer
CurrentAutônomo · Aug 2026 · Present
I work as an independent Full Stack developer in partnership with agencies, media buyers, and other marketing professionals, building solutions for digital operations and projects.
I develop automations and system integrations using n8n, APIs, and Artificial Intelligence, connecting tools, reducing manual work, and simplifying operational processes.
I build and maintain web applications, dashboards, websites, landing pages, and e-commerce solutions, with a focus on functionality, user experience, and business needs.
I develop solutions for digital marketing and Meta Ads operations, including data integration, metrics dashboards, report automation, and workflows.
Certifications
- Anthropic — AI Fluency for Builders
- Anthropic — Claude Code 101
- Hugging Face — Agents Course
- Hugging Face — Fundamentals of LLMs
- Nuvemshop — Partners Academy
- Google IT Support — Technical Support Fundamentals
Portfolio
Selected projects
Projects that represent the areas I work and keep learning in: development, automations, integrations, AI, e-commerce, and Martech.
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
CopyHaunt Ads
Ad intelligence for Meta Ads
Free extension for researching offers and creatives in the Meta Ad Library. It automates ad mining, applies filters, identifies scaling signals, organizes results, and allows users to download images and videos.
- React
- TypeScript
- Chrome MV3
- Meta Ads
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
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
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
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 announcementSpecDD 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
FAQ
Frequently asked
Quick answers about how I work, my experience, and the kinds of project I can contribute to.
Who is Andrey Santos?
Andrey Santos is an independent Full Stack developer based in Maringá, Paraná, Brazil, focused on automations, integrations, and technology applied to product, marketing, and operations. He works with React, TypeScript, Node.js, PostgreSQL, n8n, APIs, e-commerce, Meta Ads, and AI solutions, and went from developer to Head of Development and CTO inside a digital marketing agency between 2024 and 2026.
Which areas and technologies do you work with?
Full Stack development with React, TypeScript, Next.js, Node.js, PostgreSQL, and Python; automations and integrations with n8n, REST APIs, and webhooks; e-commerce on Nuvemshop, Shopify, and WooCommerce; and AI solutions using agents, RAG, tool calling, and MCP.
Do you work with automations and integrations?
Yes — it is the main focus of my work. I build n8n flows and API integrations that connect CRMs, WhatsApp, spreadsheets, marketing platforms, and internal systems, reducing manual tasks and organizing the operation’s processes.
Do you build websites, systems, and e-commerce?
Yes. I build websites, landing pages, dashboards, and custom internal systems, as well as online stores on Nuvemshop, Shopify, and WooCommerce, with the integrations each operation needs.
Do you work with agencies and marketing teams?
Yes. I partner with agencies, media buyers, and marketing teams as the technical layer of their projects: automation, data, tool integration, and support for performance, Meta Ads, and Martech initiatives.
How much does a project cost?
It depends on the scope: a landing page is simpler than an automation connecting several systems or a full online store. Estimates are free and commitment-free — just send me a message describing the project.
Do you work with companies outside Brazil?
Yes. I work remotely with companies in Brazil and internationally.
Are you open to professional opportunities?
Yes. I am interested in opportunities in development, automation, integrations, e-commerce, Martech, and product, as well as partnership projects with companies, agencies, and professionals who need technical support in these areas.
Contact
Open to new opportunities
I am interested in opportunities in development, automation, integrations, e-commerce, Martech, and product — mainly in places where I can keep growing technically, learn from other people, and help build solutions to real problems.
I am also open to partnership projects with companies, agencies, and professionals who need technical support in these areas. If you want to talk about an opportunity, a project, or just exchange ideas, reach out.