I’m a product-driven full-stack engineer focused on building production-grade systems — not demos, not experiments, not disposable code.
My work spans SaaS platforms, business systems, and data-driven simulation engines, guided by:
- clarity over cleverness
- structure over chaos
- longevity over hype
I design software the way infrastructure is designed:
to carry weight, survive scale, and evolve without collapsing.
🟡 SaaS Platforms
Authentication • Roles • Dashboards • Secure business logic
🟡 Business & Service Websites
SEO-first • Performance-focused • Conversion-aware
🟡 Internal Systems & Tools
Admin panels • Data workflows • Automation
🟡 Simulation & Game Engines
Rulesets • Seasons • Deterministic logic • Data-driven systems (Unity / C#)
🚀 RB Personal Trainer — SaaS Platform
Multi-role platform with authentication, dashboards, goal tracking, and secure sessions
Stack: PHP • MySQL • JavaScript
🏁 Open-Wheel Racing Manager — Simulation Engine
Simulation-first racing manager with seasons, drivers, teams, and regulation systems
Stack: C# • Unity
🏢 Zach’s Quality Services — Business Website
Production website for a real company, focused on SEO, performance, and conversions
Stack: HTML • CSS • JavaScript
➡️ Explore the pinned repositories below.
- 🔹 Harden SaaS architecture and documentation
- 🔹 Expand automated testing and CI pipelines
- 🔹 Expose APIs for mobile and external integrations
- 🔹 Advance simulation engines with AI-driven systems
- 🔹 Evolve projects into fully polished products
- 📧 Email: marquesdangelo@hotmail.com
- 💼 LinkedIn: https://www.linkedin.com/in/dângelo-marques-576144395/
- 🧠 Dev.to: https://dev.to/danmarques127sys
- 📸 Instagram: https://www.instagram.com/dangelomarques_26/
“Good software is not rushed. It is designed, tested, and allowed to live.”