𝐏𝐫𝐚𝐬𝐡𝐚𝐧𝐭 𝐑𝐚𝐭𝐧𝐚𝐩𝐚𝐫𝐢𝐤𝐡𝐞  
𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 | 𝗣𝗿𝗼𝗯𝗹𝗲𝗺 𝗦𝗼𝗹𝘃𝗲𝗿

> “𝗜 𝗱𝗼𝗻’𝘁 𝗷𝘂𝘀𝘁 𝗰𝗼𝗱𝗲 — 𝗜 𝗽𝗲𝗿𝗳𝗲𝗰𝘁 𝘄𝗵𝗮𝘁 𝗼𝘁𝗵𝗲𝗿𝘀 𝗼𝘃𝗲𝗿𝗹𝗼𝗼𝗸.”  
> 🧠 𝗖𝗼𝗱𝗲 𝗶𝘀 𝗲𝗮𝘀𝘆. 𝗜𝗺𝗽𝗮𝗰𝘁 𝗶𝘀 𝗵𝗮𝗿𝗱 — 𝗮𝗻𝗱 𝘁𝗵𝗮𝘁’𝘀 𝘄𝗵𝗲𝗿𝗲 𝗜 𝗰𝗼𝗺𝗲 𝗶𝗻.

---

👨‍💻 𝗔𝗯𝗼𝘂𝘁 𝗠𝗲

𝗜 𝗮𝗺 𝗮 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 & 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 𝘄𝗶𝘁𝗵 8+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗴𝗿𝗮𝗱𝗲,
𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘄𝗲𝗯 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 — 𝗳𝗿𝗼𝗺 𝗺𝗼𝗻𝗼𝗹𝗶𝘁𝗵𝘀 𝘁𝗼 𝗺𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀.  
𝗜 𝗯𝗿𝗶𝗱𝗴𝗲 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱, 𝗯𝗮𝗰𝗸𝗲𝗻𝗱, 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀, 𝗮𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 𝗶𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 𝗶𝗻𝘁𝗼 𝗰𝗼𝗵𝗲𝘀𝗶𝘃𝗲, 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲, 𝗮𝗻𝗱 𝘁𝗲𝘀𝘁𝗮𝗯𝗹𝗲 𝘀𝘆𝘀𝘁𝗲𝗺𝘀.

---

🧠 𝗖𝗼𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗣𝗿𝗶𝗻𝗰𝗶𝗽𝗹𝗲𝘀

- 𝗢𝗢𝗣 𝗙𝗶𝗿𝘀𝘁 – Encapsulation, abstraction, polymorphism.  
- 𝗦𝗢𝗟𝗜𝗗 𝗗𝗲𝘀𝗶𝗴𝗻 – Maintainable, extendable, testable code.  
- 𝗖𝗹𝗲𝗮𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 – Separate domain, application, infrastructure.  
- 𝗔𝗣𝗜-𝗙𝗶𝗿𝘀𝘁 – Contract-driven design with REST/GraphQL.  
- 𝗦𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗠𝗶𝗻𝗱𝘀𝗲𝘁 – Stateless, queues, background jobs.  
- 𝗗𝗲𝘃𝗢𝗽𝘀 𝗖𝗼𝗻𝘀𝗰𝗶𝗼𝘂𝘀 – Containerized builds, pipelines, monitoring.

---

🧩 𝗦𝘁𝗮𝗰𝗸 & 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲

| Layer | Tools / Concepts |
|-------|-----------------|
| Frontend | React • Vue • Angular • TypeScript • SCSS • Component-driven Design |
| Backend | PHP (Laravel, Symfony, Yii2, CakePHP) • Node.js • Express • Microservices • REST • GraphQL |
| Architecture / OOP | SOLID • Repository/Service Layers • Event-Driven • Domain-Driven Design |
| Database / Cache | MySQL • PostgreSQL • MongoDB • Redis • Query Optimization |
| Cloud / DevOps | AWS (EC2, Lambda, S3, RDS) • Docker • CI/CD • Logging & Monitoring |
| Testing | Unit, Integration, E2E • PHPUnit • Jest • Cypress |

---

🔥 𝗖𝗿𝗶𝘁𝗶𝗰𝗮𝗹 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗖𝗮𝘀𝗲𝘀

---

### 1️⃣ Payment Gateway Integration



**Problem:** The system needed to handle multiple payment gateways, each with its own API, making integration and management cumbersome.

**Solution:** Implemented a unified payment processing structure using an interface-based design. Each payment gateway (like Stripe or Razorpay) implements a common `PaymentGateway` interface. The `PaymentService` class depends on this interface rather than concrete implementations, allowing seamless integration of new gateways without modifying the core logic.

**Outcome:**

* New payment gateways can be added easily **without changing the main system logic**.
* The system became **fully unit-testable**, improving reliability.
* Maintenance complexity decreased significantly, reducing overhead by **around 60%**.



---

### 2️⃣ CI/CD Pipeline Automation

**Problem:** Manual deployments caused downtime and inconsistent releases.

```yaml
name: CI/CD Pipeline
on: [push]
jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Install Dependencies
        run: composer install
      - name: Run Unit Tests
        run: php artisan test
      - name: Build Frontend
        run: npm run build
      - name: Deploy to AWS
        run: ./deploy.sh production
```

**Outcome:**

* Deployment errors **eliminated**
* Deployment time reduced from **2 hours → 10 minutes**
* Rollbacks fully automated

---

### 3️⃣ Event-Driven Microservices

**Problem:** Monolith unable to handle high-order volume; slow processing.

```php
class OrderPlacedEvent { public function __construct(public int $orderId) {} }

class OrderProcessor {
    public function handle(OrderPlacedEvent $event) {
        // async DB update, notify user, trigger shipping
    }
}

// Dispatch event
$event = new OrderPlacedEvent(10023);
dispatch($event);
```

**Outcome:**

* Async processing → throughput **5x faster**
* Independent services → horizontally scalable
* Real-time notifications without blocking main thread

---

### 4️⃣ Database Optimization

**Problem:** Slow reporting queries under heavy load.

**Solution:** Indexing, query optimization, caching, table partitioning.

**Outcome:**

* Query performance improved **10x**
* Real-time dashboards with no lag
* System supports **100k+ concurrent requests**

---

🏗 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗶𝗮𝗴𝗿𝗮𝗺

```
Frontend (React / Vue / Angular)
       ↕ REST / GraphQL
Backend API (PHP / Node.js / Microservices)
       ↕
Database / Cache (MySQL / PostgreSQL / MongoDB / Redis)
       ↕
Cloud Infrastructure (AWS, Docker, CI/CD, Logging)
```

---

🧰 𝗧𝗼𝗼𝗹𝗯𝗼𝘅

<p align="center">
  <img src="https://skillicons.dev/icons?i=php,nodejs,ts,react,vue,angular,aws,docker,mysql,postgres,redis,git,html,css" />
</p>

---

📫 𝗖𝗼𝗻𝗻𝗲𝗰𝘁

🌐 [Portfolio](http://prashantwork.in)<br/>
🔗 [LinkedIn](https://www.linkedin.com/in/prashant-ratanparikhe/)<br/>
💼 [Upwork](https://www.upwork.com/freelancers/~017610bbd9c360bc19?viewMode=1)



---

> “𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗶𝘀 𝗵𝗼𝘄 𝘆𝗼𝘂 𝗺𝗮𝗸𝗲 𝘆𝗼𝘂𝗿 𝗰𝗼𝗱𝗲


𝗹𝗮𝘀𝘁 𝗹𝗼𝗻𝗴𝗲𝗿 𝘁𝗵𝗮𝗻 𝘆𝗼𝘂𝗿 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁.”

© 2015-2025 𝐏𝐫𝐚𝐬𝐡𝐚𝐧𝐭 𝐑𝐚𝐭𝐧𝐚𝐩𝐚𝐫𝐢𝐤𝐡𝐞

```