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Grzafnan/README.md




🧠 About Me

Senior Full Stack Software Engineer with 4+ years of experience building scalable SaaS platforms, enterprise-grade systems, and cloud-native applications focused on performance, security, and real-world business impact.

Specialized in end-to-end system architecture and development using React.js, Next.js, TypeScript, Node.js, NestJS, and modern cloud infrastructure.

Strong expertise in:

  • Scalable system design & distributed architectures
  • Secure authentication, authorization & RBAC systems
  • RESTful APIs & backend engineering
  • SQL/NoSQL data modeling at scale
  • AWS & cloud-native deployments
  • Performance optimization & production reliability

Experienced across CRM, ERP, POS, finance systems, workflow automation, eCommerce, analytics platforms, campaign systems, and enterprise web applications.

I focus on building systems that are secure by design, scalable by architecture, and reliable in production environments.


🛠 Tech Stack

  • 🌐   React.js • Next.js • TypeScript • JavaScript (ES6+) • HTML5 • CSS3 • Tailwind CSS • Bootstrap • Redux • Responsive UI Systems
  • ⚙️   Node.js • NestJS • Express.js • RESTful APIs • Microservices • WebSockets • Server-Side Rendering (SSR) • Event-Driven Architecture
  • 🛢️   PostgreSQL • MySQL • MongoDB • Firebase • Redis • Data Modeling • Query Optimization • Scalable Data Structures
  • ☁️   AWS • GCP • Docker • CI/CD Pipelines • Cloudflare • Nginx • Linux Server Management • Deployment Automation
  • 🔐   Authentication • Authorization • RBAC • JWT • OAuth2 • Secure API Design • System Architecture • Rate Limiting
  • 🔌   Google APIs • Meta APIs (Facebook/Instagram) • LinkedIn APIs • Stripe • PayPal • NMI • QuickBooks • Ads & Analytics APIs • Webhooks
  • 📊   SaaS Architecture • Multi-Tenant Systems • Workflow Automation • Real-Time Systems • High-Load Applications • Distributed System Design
  • ⚡   Caching Strategies • CDN Optimization • Database Indexing • API Optimization • Core Web Vitals • Performance Tuning
  • 🧰   Git • GitHub • VS Code • Postman • Swagger • Jira • Trello • Agile Development

📊 GitHub Stats


⚡ Engineering Focus

  • Scalable SaaS Architecture
  • High-Performance Web Systems
  • Cloud-Native Engineering
  • API & System Design
  • Production-Grade Applications
  • Automation & Integration Systems

🌐 Connect With Me

Pinned Loading

  1. aero-client aero-client Public

    JavaScript

  2. aero-server aero-server Public

    JavaScript

  3. doctors-portal-client doctors-portal-client Public

    JavaScript

  4. doctors-portal-server doctors-portal-server Public

    JavaScript

  5. Exitek Exitek Public

    JavaScript