~ ❯ whoami
Daniel Souza
~ ❯ ./stack.sh
Node.js · Python · TypeScript · GCP
~ ❯ systemctl status
● active (running) — open to work
Daniel Souza
Backend Engineer
I build scalable distributed systems, high-performance APIs, and robust backend architectures. 5+ years turning complex problems into reliable, production-grade solutions.
Engineering Philosophy
“I believe engineering is about making the right trade-offs. The KISS principle guides my decisions: solve today's problems well, avoid speculative complexity, and keep systems observable and operable. Good code is code that can be confidently deployed, debugged at 3 AM, and understood by the next engineer.”
Tech Stack
Backend
Node.js · TypeScript · Python · Rust · Nest.js · Django · Flask · Express.js
Building scalable APIs and services with modern languages and frameworks.
Databases
PostgreSQL · MySQL · Redis · SQL Optimization · Data Modeling
Designing schemas, optimizing queries, and managing data at scale.
Infrastructure
Docker · Linux · CI/CD · Rancher · Portainer · Cloud VPS
Containerizing, deploying, and managing production infrastructure.
APIs & Integration
REST · RPC/gRPC · WebSocket · API Design · Event-driven
Designing and integrating APIs with event-driven and real-time patterns.
Distributed Systems
Microservices · System Design · Performance · Scalability
Architecting distributed, fault-tolerant systems with performance in mind.
Engineering
Legacy Modernization · Security · Architecture · Best Practices
Improving codebases through modernization, security, and sound engineering practices.
Engineering Case Studies
Real production problems I have solved.
Experience
Backend Engineer
CorpSystem - IT Solutions
- Optimize SQL queries in the ERP backend, improving dashboard load times through query analysis, indexing strategies, and query restructuring.
- Reduced memory consumption in the reporting module by replacing in-memory aggregation with streaming queries and Redis caching.
- Implement and maintain Redis distributed locking to prevent concurrent duplicate processing across horizontally scaled service instances.
- Manage containerized deployments using Docker, Rancher, and Portainer on GCP infrastructure.
- Set up and maintain CI/CD pipelines for production and development environments.
- Monitor application performance and errors using Sentry across projects.
- Provide production support, debugging, performance investigation, and code reviews for the ERP backend.
Fullstack Engineer
Soluque Informática
- Developed an event-driven multi-service platform (Solubot) for customer service automation across WhatsApp, Facebook, Instagram, and web channels — the core system handles sending and receiving messages on all three platforms. Built WhatsApp Business API integration with WebSocket real-time delivery and automatic reconnection. Integrated optional services such as Typebot, OpenAI, and Movidesk for extended functionality.
- Designed feature development strategies and architected backend solutions to improve development velocity and system reliability.
- Set up structured logging and monitoring dashboards for production observability and debugging.
- Developed and maintained institutional websites, landing pages and client portals using WordPress, while also working on backend systems, integrations and internal products.
IT Technician
Soluque Informática
- Managed configuration and maintenance of Linux and Windows production servers.
- Implemented network monitoring and automated backup solutions.
- Provided infrastructure support for application deployment and server administration.
Quick Summary
Brazil — Rio Grande do Sul
Open to remote
Backend Engineer
Education & Languages
Systems Analysis and Development
UNINTER — 2021–2023
Computer Assembly and Maintenance
SENAC — 2015
Languages
- Portuguese (Native)
- English — Professional working proficiency
- Spanish — Intermediate
Open to work
Featured Projects
Production systems and technical projects — with business impact.
CorpERP — Backend
ERP backend handling financial operations and inventory management. Maintained and improved using Python, Django REST Framework, and MySQL. Work includes query optimization, Redis distributed locking, feature implementation, DevOps on GCP and VPS using Portainer, and production support.
Solubot
Multi-service customer platform integrating WhatsApp, Facebook, Instagram, and web chat channels. Backend built with event-driven patterns for message processing and service orchestration. Includes WhatsApp Business API integration with WebSocket real-time delivery and designed feature development strategies. DevOps on VPS using aaPanel and customer support in certain cases.
devAPI
API built using only the Solubot core to integrate multiple client systems with WhatsApp, allowing them to send and manage messages through a dashboard. DevOps on VPS using aaPanel.
DG Details
Landing page for an automotive aesthetics studio built with Next.js and Tailwind CSS.
History Maker
Narrative generation platform built with Next.js, featuring AI-powered content generation.
Open Source
PortfolioJS
Meu portfolio feito com HTML,CSS e Javascript
django-sales-project
A REST API built with Django for sales management, featuring modules for customers, products, orders, and report generation with filtering and export options in PDF and Excel. Includes a lightweight HTML micro frontend for testing and quick interactions.
API-Messenger
WhatsApp API Rest
SkyRise
A Python Space Shooter
Replicator
A Node.js service that captures incoming requests and automatically forwards them to multiple URLs defined in a JSON file, making it easier to handle integrations, testing, and data synchronization across APIs.
wastories
Easily upload long videos to WhatsApp Stories! It automatically splits your video into 30-second parts and posts them seamlessly. 🚀
onion_scraper
Fast multithreaded Tor .onion scanner using random v3 address generation.
rust-sensor
A lightweight CLI monitor for tracking CPU, memory, disk, and network usage without straining the system.
down-monitor
Monitors website status in real-time while the app is open, saving site list in local storage for next session.
Chatter
A delightfully basic Python chatbot that lets you chat via text or voice. No frills, just talk!
Server-Status
Create a list of servers and check their status
Kloudan
A tiny yet mighty cloud storage service built with Rust
PyClassroom
PyClassroom – a simple yet powerful teaching platform built as a college project, designed to make learning more accessible and interactive!
Meu-Jogo-da-Velha
Projeto em Java criado para trabalho da faculdade
Let's Work Together
I am currently open to remote Backend Engineer positions. If you are hiring for a role involving distributed systems, API architecture, or backend performance — let's talk.