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kirito18/README.md

Hi, I'm Rober 👋

Backend & API Integration Engineer
Payments • Webhooks • Shopify • Automation • UX/UI-minded Front-End

I design integrations that don’t break.

🚀 Core Expertise

  • 🔌 API Integrations (REST, OAuth, token flows, webhooks)
  • 💳 Payment lifecycle systems (authorize → capture → refund → idempotency)
  • 🔐 Secure webhook validation (HMAC, logging, replay protection)
  • 🛒 Shopify backend integrations & CRM sync
  • 🔁 Automation-first backend architecture
  • 🏗 System design & service orchestration
  • 🎨 UX/UI-driven front-end with real backend logic

🧠 About Me

I build production-grade backend systems that connect products, platforms, and data.

With 7+ years of experience, I specialize in:

  • Designing and building custom REST APIs
  • Developing secure webhook-driven workflows
  • Architecting ecommerce & telemedicine-style integrations
  • Implementing payment flows with validation & state control
  • Automating CRM, Docs/Sheets, and messaging systems

I care about:

✔ Clean architecture
✔ Reliable data flow
✔ Secure integrations
✔ Performance & scalability
✔ Real-world usability (UX/UI mindset)

🔥 Highlighted Work

  • 💰 Payment Flow Simulator — realistic payment lifecycle system with idempotency & state machine
  • 🔐 Webhook Receiver Lab — secure HMAC webhook handler with structured logging
  • 🛒 Shopify Integration Snippets — production-style webhook + CRM integration
  • 🏥 Telemedicine Architecture Notes — full system blueprint (intake → pharmacy)

💼 What I Help Clients With (Upwork-Friendly)

  • Shopify webhook setup & debugging
  • CRM / ERP synchronization
  • Payment gateway integration logic
  • Backend automation workflows
  • API stabilization & performance optimization
  • Secure webhook validation

🛠 Tech Stack

Backend: PHP, Laravel, Node.js
Frontend: Angular, Shopify Themes, WordPress
Infra: AWS, Plesk, cPanel
Patterns: REST, Webhooks, Idempotency, Logging, System Architecture

🤝 Connect With Me

⚙️ GitHub Analytics

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  1. api-integration-starter-php api-integration-starter-php Public

    Production-ready PHP starter for API integrations (cURL client, .env, logging, error handling, examples).

    PHP

  2. payment-flow-simulator payment-flow-simulator Public

    Simulated payment lifecycle (authorize/capture/void/refund) in PHP with JSON/SQLite storage, logging, and clean API endpoints.

    PHP

  3. Sales-Assistant-Groq-AI Sales-Assistant-Groq-AI Public

  4. shopify-integration-snippets shopify-integration-snippets Public

    Production-ready Shopify webhook and API integration examples: HMAC validation, order sync, CRM integration, logging patterns and security best practices.

    PHP 1

  5. telemedicine-architecture-notes telemedicine-architecture-notes Public

    Architecture notes and flow diagrams for telemedicine platforms: intake → eligibility → voucher → provider → pharmacy. Includes API patterns, security checklist and common pitfalls.

  6. webhook-receiver-lab webhook-receiver-lab Public

    Minimal webhook receiver with HMAC signature validation, JSON persistence, logging, and retry-safe responses.

    PHP