Full-Stack Software Engineer | Specialist in Secure Auth, High-Performance Databases & Responsive Web Apps

Hi, I’m Sergi. I am a Full-Stack Engineer with 3 years of professional experience building fast, secure, and production-ready web applications. I am a deep-dive developer who doesn't just utilize standard tools—I engineer them from scratch. I am the creator of MasqueradeORM, a lightweight, open-source Node.js ORM featuring batched implicit writes, intelligent runtime schema cleanup, and built-in Entity Mapping to eliminate in-memory duplication.
I can bridge the gap between fluid, responsive frontends and highly optimized database backends.

Core Tech Stack:
Frontend: Vue 3, TypeScript, JavaScript, HTML5/CSS3
Backend & Server: Node.js, RESTful APIs, Nginx Reverse Proxies
Databases & Tools: PostgreSQL, SQLite, MasqueradeORM

Proven Expertise & Services:
Advanced Authentication & Security: Implementing enterprise-grade user login, registration, and robust session management using self-refreshing, revolving cookies.
Interactive UI & Customization: Developing fluid user interfaces featuring native theme support (light/dark modes) and full localization for multi-language markets.
E-commerce Architectures: Building fast, efficient e-commerce filtration systems and custom multi-column product sorting logic.
Real-Time & Communication Systems: Building interactive direct messaging (DM) systems and automated transactional email workflows.
Database Design & Optimization: Structuring high-efficiency database layers with parameterized queries to guarantee SQL injection protection.

How We Will Work Together:
Scope Discovery: We map out your system requirements, specific endpoints, and frontend views.
Clear Milestones: I provide a fixed-price or milestone-based quote. Zero platform cuts mean better value for your budget.
Direct Delivery: You get complete code transparency with regular repository commits and continuous feedback.
Flexible Billing: Payments are managed 100% directly through your preferred invoice channel (Wise, Stripe, Wire).

Ready to bring your application to life with clean, high-performance code? Click Message to discuss your project requirements today!