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leviroiz/README.md

Levi Roiz — Connection Mark

Levi Roiz

Full-stack Software Developer · Automation · Systems Integration

I design, develop and deploy software for real business operations — from warehouse management and logistics to e-commerce automation and internal systems.

Currently working as an IT Assistant at Kallifon.

Build • Connect • Improve.

LinkedIn · Email

Professional Work

SEEK — Warehouse Inventory & Location Management

Independently designed, developed and deployed a full-stack warehouse system for product location, storage addressing and inventory verification.

React TypeScript Django PostgreSQL Docker

Read engineering case study →

Logistics Tracking & Automated Notifications

Developed J&T Express tracking integrations and automated customer email notifications, with persistent processing, deduplication and retry mechanisms.

API Integration Backend Automation

Read engineering case study →

Business & E-commerce Automation

Built solutions for automated NF-e delivery, controlled ERP order processing, product image matching and bulk uploads. Also developed the frontend of the Kallifon Carreira recruitment platform.

Python ERP APIs React Next.js

Explore automation case studies →

Company systems are private. Technical case studies describe professional contributions without exposing proprietary source code or operational data.

Selected Public Projects

E-commerce Price Validation Automation

Python and Selenium automation for validating product variations, checking stock and applying controlled price corrections. Public reconstruction with synthetic data and automated tests.

Python Selenium Pytest GitHub Actions

Repository →

Presentes da Cegonha

Academic e-commerce project originally developed in 2023 and modernized in 2026 with improved security, stock transactions, Docker and automated tests.

PHP MariaDB Docker GitHub Actions

Repository →

Commercial Pricing Calculator

Browser-based simulator for comparing commercial discount scenarios, with deterministic business rules, Playwright tests and automated CI.

JavaScript Playwright GitHub Actions

Repository →

Other projects: HR Onboarding Automation · Consignment Batch Management

Technologies

Languages: Python · TypeScript · JavaScript · SQL · PHP

Development: Django · FastAPI · React · Next.js · REST APIs

Data & Infrastructure: PostgreSQL · MariaDB · MySQL · Docker · Nginx · Git

Automation & Quality: Selenium · Playwright · Pytest · GitHub Actions · Google Apps Script


Background

Software Engineering — UniCesumar
Expected graduation: 2030

Technical Degree in Information Technology — EEEP Monsenhor José Aloysio Pinto
2023

Based in Sobral, Ceará, Brazil.

Pinned Loading

  1. ecommerce-price-validation-selenium ecommerce-price-validation-selenium Public

    Python + Selenium automation for validating e-commerce prices, product variants and stock-aware divergences with safe selective correction.

    Python

  2. presentes-da-cegonha presentes-da-cegonha Public

    Modernized academic e-commerce project focused on web security, Docker, CI, automated tests and backend hardening with PHP and MariaDB.

    PHP

  3. calculadora-comercial-publica calculadora-comercial-publica Public

    Commercial pricing calculator that compares loyalty, progressive pricing and PIX scenarios using isolated business rules and automated UI tests.

    JavaScript

  4. rh-admission-automation-demo rh-admission-automation-demo Public

    Google Workspace automation for organizing HR admission documents with Forms, Sheets, Apps Script and Drive.

    JavaScript

  5. gestao-lotes-consignados-demo gestao-lotes-consignados-demo Public

    Portfolio demo for tracking consignment batches, settlements, returns, pending balances and customer portfolios with role-based views.

    JavaScript