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a production

Victor Quaresma · Full Stack Developer + Applied AI

SCENE 00

Lovewave · The 1-800

a production

byVictor

Victor Quaresma · Full Stack Developer + Applied AI

São Luís, Brazil

Scene 01 · About

About

Age
23
Based in
São Luís, Brazil
Education
Information Systems — IFMA, since 2022
Founder
Rethink3D, since Nov 2024
Now
IT intern at Grupo Almeida Andrade, where I built OMNIS
Languages
Native Portuguese · intermediate English

What I use

Languages

TypeScript · JavaScript · SQL · PL/pgSQL · Python · Java · C# · Delphi · C (OpenMP, MPI) · HTML and CSS · PowerShell

Front end

React 19 · Next.js 16 · Astro · Vite · Tailwind CSS · CSS Modules · TanStack Query · Zustand

Mobile

React Native · Expo · Expo Router · EAS Update · App Store and Google Play

Back end

Node.js · NestJS · Fastify + Zod · Express · Spring Boot · Socket.IO · Prisma · TypeORM

Data

PostgreSQL (RLS, views, pg_cron) · Supabase (Auth, Storage, Edge Functions) · MongoDB · MySQL · H2 · Firebase

Applied AI

Anthropic API (Claude) in production, with streaming and prompt caching · read-only SQL enforced by the database (RLS), not the prompt · spending cap and a daily per-person limit · AI document triage (n8n) · Evolution API (WhatsApp)

3D and motion

three.js (WebGPU + TSL) · React Three Fiber · GSAP · anime.js · Web Audio API

Integrations

Pix and bank slips (Asaas) · NF-e e-invoices (key and XML) · Microsoft Graph · SharePoint · DataJud (CNJ) · Google and Apple sign-in · solar inverter APIs

Testing and quality

Vitest · Jest · Playwright · Testcontainers · RLS impersonation tests · Lighthouse

Infra and DevOps

Docker · GitHub Actions · Vercel · AWS (S3, RDS) · Supabase Edge Functions · DNS and domains

Claude Code

I work with Claude Code every day

Tools

Git and GitHub (gh) · Vercel CLI · Deno · EAS · VS Code · Obsidian · Figma · Jira · Scrum and Kanban

How I work

Founding
co-founder of Rethink3D, from the app in the stores to the marketplace online
Shipping on short deadlines
systems in production within weeks and websites live in a day
Training the people who use it
trainings and tutorials built into the systems themselves
Working with non-technical people
screens and flows designed for teams without IT staff
Communicating
planning and priorities agreed with management
Handling production issues
fast diagnosis and a calm fix
Security mindset
permissions tested before any user gets in
Code review
reviewing pull requests on shared projects
Documenting decisions
decisions and plans written down for whoever comes next
Self-learning
integrating new APIs from their docs, even when the docs are wrong

Projects

Scene 02 · Interface

Interface

EGI Empreendimentos

Rentals for the group's own properties — developments and units in a database with row-level access rules, its own admin panel and pages that refresh themselves.

tests
70
SQL migrations
6
EGI Empreendimentos home page with the headline about great developments over mirrored towers and the counts of developments, units and occupancy

Exclusiva Engenharia

Corporate website for a construction company in Maranhão, with its portfolio of works across 7 segments and the headline figures computed from the data.

segments in the portfolio of works
7
pages
4
Exclusiva Engenharia home page with the headline about three decades of engineering in Maranhão over a condominium street and the work segments below

Scene 03 · Mobile

Mobile

Scene 04 · API

API

Scene 05 · AI

AI

OMNIS

An internal management system for a group of companies, with an AI assistant that answers questions about day-to-day data.

    OMNIS login screen

    Scene 06 · Other projects

    Other projects

    Portal Internet

    Website for a fiber provider in São Luís, with sign-up through a private link, automatic address lookup and CPF/CNPJ validation.

    plans
    10
    questions in the plan-finder quiz
    4
    tests for masks and CPF/CNPJ
    20
    Portal Internet home page with the headline about fast internet for the whole family, the green-headphone mascot and the 300, 400 and 700 Mbps plans

    Rethink3D Admin Panel

    The marketplace's back office — makers, products, orders, returns, maker payouts, reports and push notifications sent only to users with a registered device.

    Neovim Livre

    A Portuguese-language site for learning Neovim, built by IFMA's Free Software class — I maintained the repository, reviewed the class's PRs and added comments (Giscus).

    Neovim Livre home page with the green "Neovim" title and the tagline about Portuguese documentation for the editor

    TaskFlow

    A column task board built for a short course — a React front end and a NestJS API with TypeORM and PostgreSQL.

    TaskFlow board with Backlog, In Progress, Review, Done and Blocked columns and the departments side panel

    NFe Hub

    A Node and TypeScript fiscal API that builds NF-e access keys and XML, consumed by a Delphi client.

    tests
    24
    CI/CD workflows
    2

    Scene 07 · Data

    Data

    The bottom of the stack: what holds up everything above it.

    commits on real projects
    2,040+
    automated tests
    2,100+
    database migrations
    260+

    HTTP/1.1 200 OK

    200 OK

    Response delivered. Thanks for watching.

    Credits

    Written, directed and coded by
    Victor Quaresma
    Starring
    EGI Rental
    OMNIS
    Portal Internet
    Rethink3D
    Rethink3D Raffle System
    Rethink3D Admin Panel
    EGI Empreendimentos
    Exclusiva Engenharia
    Neovim Livre
    TaskFlow
    NFe Hub
    Technical cast
    Languages TypeScript · JavaScript · SQL · PL/pgSQL · Python · Java · C# · Delphi · C (OpenMP, MPI) · HTML and CSS · PowerShell
    Front end React 19 · Next.js 16 · Astro · Vite · Tailwind CSS · CSS Modules · TanStack Query · Zustand
    Mobile React Native · Expo · Expo Router · EAS Update · App Store and Google Play
    Back end Node.js · NestJS · Fastify + Zod · Express · Spring Boot · Socket.IO · Prisma · TypeORM
    Data PostgreSQL (RLS, views, pg_cron) · Supabase (Auth, Storage, Edge Functions) · MongoDB · MySQL · H2 · Firebase
    Applied AI Anthropic API (Claude) in production, with streaming and prompt caching · read-only SQL enforced by the database (RLS), not the prompt · spending cap and a daily per-person limit · AI document triage (n8n) · Evolution API (WhatsApp)
    3D and motion three.js (WebGPU + TSL) · React Three Fiber · GSAP · anime.js · Web Audio API
    Integrations Pix and bank slips (Asaas) · NF-e e-invoices (key and XML) · Microsoft Graph · SharePoint · DataJud (CNJ) · Google and Apple sign-in · solar inverter APIs
    Testing and quality Vitest · Jest · Playwright · Testcontainers · RLS impersonation tests · Lighthouse
    Infra and DevOps Docker · GitHub Actions · Vercel · AWS (S3, RDS) · Supabase Edge Functions · DNS and domains
    Claude Code I work with Claude Code every day
    Tools Git and GitHub (gh) · Vercel CLI · Deno · EAS · VS Code · Obsidian · Figma · Jira · Scrum and Kanban
    Behind the scenes
    Founding
    Shipping on short deadlines
    Training the people who use it
    Working with non-technical people
    Communicating
    Handling production issues
    Security mindset
    Code review
    Documenting decisions
    Self-learning
    Original soundtrack
    The 1-800
    “Lovewave”
    Built with
    Astro
    React Three Fiber
    three.js WebGPU + TSL
    GSAP
    anime.js
    Lenis
    Howler
    Props
    8mm projector — PeterM
    Street lamp — Josh Dean
    Poly Haven · CC0
    Typefaces
    Bodoni Moda · Schibsted Grotesk · IBM Plex Mono

    Contact