Client sites, and the products I build on my own.

Scroll through the work

1. 

   Franco Gestão Empresarial

   francogestaoempresarial.com

   Full institutional site for an accounting firm, with home, services, blog, careers and contact. Next.js frontend talking to its own API, security headers set by hand. Still online three years later.

   Next.js · API · CSP/HSTS

   Open site
2. 

   AB&G Advocacia

   abegadvogados.com.br

   A law firm's public site plus a separate admin panel on its own subdomain. Two very different jobs, one stack, both still maintained.

   Next.js · Admin panel · Auth

   Open site
3. 

   Mobitech Imóveis

   imobiliariajoinville.online

   Property catalogue for a real estate agency in Joinville and Itapema, with its own API, local SEO marked up as schema.org and Cloudflare in front.

   Next.js · API · schema.org · Cloudflare

   Open site
4. 

   Rustic Dream House

   rusticdreamhouse.com

   Furniture store with a Next.js storefront decoupled from a Laravel admin that also serves the theme assets. Accounts, cart and checkout included.

   Next.js · Laravel admin · Cloudflare

   Open site
5. 

   MG Tech

   mgtechbr.com

   The site for my own agency, plus the tools behind it: a six question lead diagnostic instead of a contact form, a proposal generator and a small CRM.

   Next.js · CRM · Lead funnel

   Open site
6. 

   WF Gabrielle

   consignadoragabrielle.com.br

   Car consignment dealership site built around WhatsApp lead capture, with a PWA setup and analytics wired in for conversion tracking.

   Next.js · PWA · GA4

   Open site

7. Own products

8. 

   Sumarista AI

   2025 · Product

   Turns a 40 page PDF into a structured summary. Freemium, built and shipped solo, live in production.

   Next.js · TypeScript · PostgreSQL · Cypress · GitHub Actions

   sumaristaai.vercel.appgithub.com/matheusmartinsviana/sumaristaai
9. 

   Khronos Backend API

   2025 · Product

   REST API for sales processing and business data, built solo as my college final project against a real case study for the company Khronos. Layered Node and Express over MySQL, JWT auth, rate limiting, Dockerised, Jest tests.

   Node.js · Express · MySQL · JWT · Docker · Jest

   khronos-api.apidocumentation.comgithub.com/matheusmartinsviana/khronos-backend-api