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Matheus Davy

React · Node.js · TypeScript · AI & LLMs · ML

Full Stack Software Engineer
matheusdavy14@gmail.com

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01 — About

A little about me

  • Full Stack software engineer with 5 years of experience building web and mobile products with React, Next.js, Node.js and TypeScript.

  • From a B2B/B2C LMS platform serving companies like iFood, IBM and Bayer to a lead generation platform with 3,000+ active customers.

  • Today I work with applied AI: RAG and Agentic RAG, agent orchestration with LangGraph, MCP Tools and predictive conversion and churn models (XGBoost, TensorFlow).

  • GraphQL and REST APIs, automated testing (Jest, Playwright, Cypress), scalable architecture and agile teams (Scrum/Kanban).

  • Founder of Scheedz® — a multi-tenant scheduling SaaS for beauty salons and aesthetic clinics.

  • Currently taking an MBA in Data Science, AI and Analytics at USP and an MBA in Applied AI Engineering.

02 — Stack

The stack , end to end

AI & LLMs
  • OpenAI
  • Gemini
  • Prompt Engineering
  • RAG
  • Agentic RAG
  • Embeddings
  • Rerank
  • LangChain
  • LangGraph
  • Agent Orchestration
  • MCP
  • Guardrails
  • Fine-tuning
ML & Data
  • Python
  • Pandas
  • XGBoost
  • TensorFlow
  • Keras
  • Predictive models
Front-end
  • React
  • Next.js
  • TypeScript
  • JavaScript ES6+
  • HTML5
  • CSS3
  • Redux Toolkit / Saga
  • Zustand
  • MobX
  • Context API
  • React Query
  • Styled Components
  • Tailwind CSS
  • Material UI
  • shadcn/ui
  • GSAP
  • Design Systems
Back-end
  • Node.js
  • Bun
  • Fastify
  • GraphQL
  • REST APIs
  • WebSockets
  • Strapi CMS
  • OAuth2
Mobile
  • React Native
  • Expo
  • React Native CLI
Architecture
  • Scalable architecture
  • Design Patterns
  • Clean Code
  • Module architecture
  • Design Tokens
  • Code Review
Testing
  • Jest
  • React Testing Library
  • Vitest
  • Cypress
  • Playwright
Databases
  • PostgreSQL
  • MySQL
  • MongoDB
  • Redis
  • Firestore
Cloud & DevOps
  • AWS
  • Google Cloud
  • Docker
Observability
  • Firebase Analytics
  • Crashlytics
  • AppsFlyer
Methodologies
  • Scrum
  • Kanban

03 — Projects

Selected work (07)

  • Video walkthrough of Scheedz®

    Multi-tenant scheduling platform with per-professional calendars, automatic reminders and booking straight through WhatsApp, a metrics dashboard and a public booking page.

    • Next.js
    • Tailwind
    • Node.js
    • Fastify
    • TypeScript
    • PostgreSQL
    • Firebase
    • WebSockets
    • Docker
    • AWS
    • GCP
    • Twilio
    • Jest
    • Cypress
    View project
  • Video walkthrough of Plataforma Solution

    A learning ecosystem serving iFood, IBM, Bayer and FEA-USP, with 500+ direct active users and 3,000+ through partners. It includes an AI-powered HR platform that recommends courses based on each person's needs and history.

    • Bun
    • Node.js
    • React
    • Next.js
    • TypeScript
    • GraphQL
    • IA
    • Jest
    • Playwright
    View project

  • A predictive system built with Machine Learning and Deep Learning that estimates how likely a customer is to subscribe to the paid plan, and to cancel.

    • Python
    • Pandas
    • XGBoost
    • TensorFlow
    • Keras
  • Video walkthrough of Leadster®

    A platform with seven-figure annual revenue. Beyond the product: 200+ interactive landing pages, a self-service CMS, a training platform and a URL shortener.

    • React
    • Next.js
    • TypeScript
    • React Query
    • GSAP
    • Node.js
    • Fastify
    • REST API
    • Strapi
    • Playwright
    • Python
    • Pandas
    • XGBoost
    • TensorFlow
    • Keras
    • RAG
    • Agentic RAG
    • Guardrails
    • MCP Tools
    • Fine-tuning
    • GCP
    View project
  • Video walkthrough of Web Crawler

    A crawler for large-scale data capture from high-traffic websites. I captured data on 4,000+ products across different categories from major e-commerce sites, producing insights worth analysing.

    • Node.js
    • TypeScript
    • Fastify
    • Playwright
  • Video walkthrough of Paid media dashboard

    A dashboard wired to the ad platforms' APIs that produces data, spreadsheets and charts for the Marketing team's decisions.

    • Node.js
    • Next.js
    • TypeScript
    • GraphQL
    • PostgreSQL
    • Redis
    • Tailwind
    • shadcn/ui
    • Meta Ads
    • GCP
  • Video walkthrough of AI mobile apps

    Apps for a sports club, a radio streaming service and AI-assisted foreign language learning.

    • React Native
    • Speech to Text
    • Gemini
    • OpenAI
    • Zustand
    • MobX

04 — Experience

Where I've been

  1. Pecege

    current

    Mid-level Front-end Software Engineer

    Jul 2025 — present

    • Work across the whole plataformasolution.com.br LMS ecosystem, from B2B management to B2C (MBAs, online courses and white label), serving iFood, IBM, Bayer and FEA-USP — 500+ direct active users and 3,000+ through partners.
    • Four applications in the ecosystem: LMS (the classroom), Manager (running the whole ecosystem), Admin (companies managing their own students, white label) and Checkout (course payments and enrolments).
    • An HR platform with built-in AI that recommends courses based on each user's needs, struggles and history.
    • Built and maintain an internal content management platform used by several teams.
    • Refactoring legacy projects onto new layouts and current technologies.
    • Bun
    • Node.js
    • React
    • Next.js
    • TypeScript
    • GraphQL
    • IA
    • React Query
    • Jest
    • Playwright
    • Scrum
    • Kanban

  2. Leadster

    · Curitiba, PR (Remote)

    Mid-level Fullstack Software Engineer

    Apr 2023 — Jul 2025

    • A lead generation platform with 3,000+ active customers and seven-figure annual revenue.
    • A Second Brain over company data: centralised internal knowledge and smart AI queries.
    • A predictive system for subscription and churn likelihood with Machine Learning and Deep Learning.
    • A Web Crawler for large-scale data capture from sites with 2M+ daily visits.
    • 200+ interactive landing pages for marketing campaigns.
    • A paid media dashboard wired to the Google Ads, Meta Ads and LinkedIn Ads APIs.
    • An in-house URL shortener.
    • A self-service CMS for the other departments and a training platform with video tutorials.
    • Code reviews, technical discussions, refinements and troubleshooting of production systems.
    • React
    • Next.js
    • TypeScript
    • React Query
    • GSAP
    • Node.js
    • Fastify
    • REST API
    • Strapi
    • Playwright
    • Python
    • Pandas
    • XGBoost
    • TensorFlow
    • Keras
    • RAG
    • Agentic RAG
    • Guardrails
    • MCP Tools
    • Fine-tuning
    • GCP
    • Scrum
    • Kanban

  3. Weecom

    · Caxias do Sul, RS (Remote)

    Junior Front-end Software Engineer

    Sep 2021 — Mar 2023

    • Corporate websites and e-commerce stores focused on usability, including jmarcon.com.br, juventude.com.br and soprano.com.br.
    • Responsive design to keep every device accessible.
    • Collaboration in cross-functional teams with Scrum and Kanban.
    • HTML
    • CSS
    • JavaScript
    • Laravel
    • MySQL
    • GSAP
    • React Query
    • Scrum
    • Kanban

  4. Freelance

    current

    Full Stack Software Engineer

    Self-employed

    • Websites for Digital Marketing companies, such as luzativo.com, with WordPress as the CMS.
    • A multi-tenant scheduling SaaS for beauty salons — app.scheedz.com.br.
    • Mobile apps for a sports club, radio streaming and AI language learning.
    • React
    • Next.js
    • TypeScript
    • Redux
    • Zustand
    • MobX
    • Tailwind
    • React Query
    • WordPress
    • React Native
    • Speech to Text
    • Gemini
    • OpenAI
    • Node.js
    • Fastify
    • WebSockets
    • PostgreSQL
    • Firebase
    • Docker
    • Jest
    • Cypress
    • Twilio
    • AWS
    • GCP
    • Kanban

05 — Education

Education

  1. MBA in Data Science, AI and Analytics

    USP · In progress

    2026 — 2027

  2. MBA in Applied AI Engineering

    Anhanguera · In progress

    2026 — 2027

  3. Systems Analysis and Development

    FATEC

    2022 — 2024

  4. Front-end Technician

    Senai

    2021 — 2022

Languages

Portuguese
Native
English
B2
Spanish
Basic

06 — Awards

Honors & awards

  • Top student of the class

    FATEC · 2024

07 — Contact

Let's build something good ?

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