theosantoro@portfolio:~$

Theo Santoro

// Backend Engineer & Software Engineer

y/o · Backend Engineer · .NET & Python · Open to open-source collaborations.

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Theo Santoro
C# / .NET 8 ⚙️ AWS ☁️ PostgreSQL 🐘 Docker 🐳 Python 🐍 Redis 🔴 Clean Arch 🏗️ SQL Server 🗄️ RabbitMQ / Kafka 📨
// projects

What I've Built

deuxcerie/page.tsx

Deuxcerie

live

Fullstack e-commerce for an artisanal French-Brazilian bakery. PIX & card payments, reference photo uploads, and real-time order tracking via webhooks.

Next.js TypeScript .NET 10 PostgreSQL Fly.io PIX / Card
Backend Code Frontend Code Live
DeuxOrders/Program.cs

DeuxOrders

live

Order management system for small businesses. Clean Architecture with .NET, JWT authentication, Docker containerization, and CI/CD via GitHub Actions. Frontend developed in iOS and deployed directly on users devices

.NET 10 C# PostgreSQL JWT Docker Clean Arch Swift
Backend Code Frontend Code
landing/App.tsx

Deux Landing Page

live

Interactive landing page for the Deuxcerie brand. Scroll-triggered animations, custom design system, and Google Gemini AI integration for interactive features.

React TypeScript Vite Tailwind CSS Gemini AI
Code Live
discord_bot/main.py

Discord Music Bot

limited

Discord music bot with queue management, YouTube search, and voice channel playback. Platform restrictions from Discord limit full functionality.

Python discord.py yt-dlp
Code
flight_monitor/main.py

Flight Monitor

live

Automatic monitoring of Google Flights prices with WhatsApp alerts every 30 minutes. Supports multiple routes, filtering by duration/stops, and historical minimum price tracking with direct purchase URLs.

Python Playwright Schedule WhatsApp API Google Flights
Code
extractor/main.py

Timesheet Extractor

live

Automatic extraction of Brazilian labor timesheets from PDFs using dual OCR strategy (pdfplumber + Gemini AI). Detects native, scanned and hybrid PDFs. Generates formatted Excel and PJeCalc CSV with real-time SSE streaming.

FastAPI Python Next.js pdfplumber Gemini AI SSE Streaming Fly.io
Code Live
// experience

Professional Journey

Software Engineer
Deuxcerie
Jan 2026 — Present

Architecture and development of the order management system: .NET 8 APIs with CQRS-lite, EF Core for write operations (ACID) and Dapper for high-throughput reads. Security via AWS Cognito (OAuth2/JWT) + AWS IAM, background workers for async processing, and CI/CD pipeline with Docker.

.NET 8 C# CQRS AWS Cognito Docker Dapper EF Core
Data Analyst I
Farm Rio
Sep 2024 — Present

Complex PostgreSQL query optimization for high-availability internal systems. Implemented processing routines in AWS and GCP with focus on performance and data security. Collaborated on architecture discussions for service ecosystem evolution.

PostgreSQL AWS GCP Advanced SQL Data Analysis
Backend Intern (Python Developer)
Subsea7
Feb 2023 — Sep 2024

Developed backend tools and Python automation scripts for critical engineering processes. Automated testing with Pytest, Docker environment standardization, and technical documentation for APIs and data flows.

Python Pytest Docker Automation FastAPI
// education

Education & Certificates

Bachelor's Degree
Production Engineering
CEFET/RJ
2022 — 2026

Data analysis, statistical methods, and project management.

// skills

Tech Stack

backend.cs
C# / .NET 8 ASP.NET Core Java / Spring Boot Python / FastAPI Background Workers Microservices
databases.sql
PostgreSQL SQL Server Redis Entity Framework Core Dapper Advanced SQL
cloud.yml
AWS (Cognito, EC2, S3) AWS IAM / RDS GCP Docker CI/CD (GitHub Actions) Trunk-Based Dev Fly.io
arch.test
Clean Architecture CQRS RESTful APIs OAuth2 / JWT Pytest / xUnit TDD Agile / Scrum
// contact

Let's Talk

● available for new opportunities

Get in Touch

Interested in working together or collaborating on projects? Send me a message!

[email protected] LinkedIn GitHub