Mauricio Kwitko

Senior Full-Stack Engineer · Applied AI

mkwitko.github.io/mkwitko — portfolio: every frame a real screen, with the stack and one engineering decision per product, plus experience and skills.

I ship web, mobile and backend products end to end, and build LLM pipelines that are measured, cost-aware and kept behind a human review step. My work is TypeScript throughout: React and React Native clients, Fastify and Node.js APIs, PostgreSQL with Prisma, and contract-first integrations.

Based in Florianopolis, Brazil (America/Sao_Paulo, UTC-3). Working hours overlap US and European time zones. Open to remote international roles.

mauriciokwt@gmail.com

Multi-repository products are grouped by family. Status describes the code in the repository, not a live deployment.

Applied AI

• affiliate-content-factory: pipeline that turns affiliate offers into reviewed social posts, branded images and narrated Reels, with a human approval queue and an MCP server. TypeScript.
• aurea-api · aurea-web-app: backend and React frontend for an AI growth operating system (business context, goals, experiments); the API has an agent runtime with budgets and tracing, credit-based Stripe billing and social publishing.

E-commerce

• ecommerce-api · ecommerce-storefront: REST API (orders, donations, raffles, events; Pix and card payments) and web storefront for community stores.

Mobile and contract-first backend

• camisa7-app · camisa7-api · camisa7-web: React Native app, backend API and public web companion for organizing pickup football (groups, matches, PIX payments, ratings).

Ambulance fleet management

• ambulance-fleet-api · ambulance-fleet-dashboard · ambulance-fleet-app · ambulance-fleet-comms · ambulance-fleet-driver: multi-tenant backend, operator console and mobile apps for crew chat, push-to-talk radio, dispatch alerts and QR-code driver check-in.

Labor-claim calculations

• labor-calculations-api · labor-calculations-web: multi-tenant API computing Brazilian labor-claim settlements with DataJud docket sync, and a web client with public calculators.

Field operations

• field-operations-tracker-api · field-operations-tracker-app · field-operations-tracker-web: field data tracking (sessions, preparations, stock per unit and region) with role-based access, a mobile client and a read-only admin panel.
• planting-geotracker-api · planting-geotracker-app: offline-first mobile app that registers plantings on a map with averaged GPS coordinates and photos, synced to a REST API.

Tools and sites

• framer-site-capture-plugin: Framer plugin that captures a published website and composes presentation-ready mockups.
• wedding-rsvp-site: wedding website with personal invitation links, RSVP form and a Firebase-backed admin panel.

• Frontend: React, Next.js, TypeScript, accessible components, TanStack Query.
• Backend: Node.js, Fastify, NestJS, PostgreSQL, Prisma, OpenAPI, authentication, integration adapters.
• Mobile: React Native, Expo Router, offline-first sync, push notifications.
• Applied AI: LLM integrations, orchestration, tool use, evaluation and human-in-the-loop pipelines.