API Development & Backend Architecture Portfolio

From Technical Sales to Software Development: Building robust backend solutions with RESTful APIs, database design, and enterprise-level architecture thinking.

REST API Design
JWT Authentication
SQL Database Design
ReviewController.js
// RESTful API Controller
class ReviewController {
    async createReview(req, res) {
        try {
            const { customerName, rating, content } = req.body;
            
            // Validate JWT token
            const user = await this.auth.verifyToken(req.headers.authorization);
            
            // Create review with sentiment analysis
            const review = await this.reviewService.create({
                customerName,
                rating,
                content,
                sentiment: this.analyzeSentiment(content),
                userId: user.id
            });
            
            res.status(201).json({ success: true, data: review });
        } catch (error) {
            this.handleError(res, error);
        }
    }
}

Project Overview

This comprehensive API showcase demonstrates my transition from understanding how systems integrate (from my technical sales background) to actually building them as a software developer.

CRUD Operations

Complete Create, Read, Update, Delete functionality with proper validation, error handling, and business logic implementation.

JWT Authentication

Secure token-based authentication with role-based access control, session management, and proper security practices.

RESTful Design

Industry-standard REST API design with proper HTTP methods, status codes, and resource-oriented architecture.

Documentation

Comprehensive API documentation with interactive testing capabilities, Postman collections, and clear examples.

System Architecture

A well-designed, scalable architecture that demonstrates enterprise-level thinking applied to backend development.

Architecture Flow

Client Applications

Web, Mobile, External Systems

API Gateway

Authentication, Rate Limiting

Business Logic

Services, Controllers, Validation

Database Layer

PostgreSQL, Redis Cache

JavaScript

Modern ES6+ with Node.js runtime for server-side development

Express.js

Lightweight web framework for building RESTful APIs

PostgreSQL

Advanced relational database with complex query support

JWT

Secure token-based authentication system

Interactive API Demo

Test the API endpoints directly in your browser. This simulation demonstrates the complete functionality including authentication, CRUD operations, and error handling.

1. Authentication

Not authenticated. Use demo credentials above to login.

2. Customer Reviews Management

Create New Review

Customer Reviews

Click "Refresh" to load reviews or create a new review above.

3. API Response Log

// API responses will appear here as you interact with the demo

// This simulates real API communication with proper JSON responses

API Documentation

Comprehensive documentation following OpenAPI standards, making integration straightforward for any development team.

API Endpoints

Authentication

POST /api/auth/login

Authenticate user and receive JWT token

View Request/Response
{
  "email": "user@example.com",
  "password": "password123"
}

Reviews

GET /api/reviews

Retrieve all customer reviews with pagination

POST /api/reviews

Create a new customer review

GET /api/reviews/:id

Retrieve a specific review by ID

PUT /api/reviews/:id

Update an existing review

DELETE /api/reviews/:id

Delete a review

From Sales to Software Development

My unique journey from technical sales to software development brings valuable business perspective to backend architecture decisions.

API Integration Understanding

From my time at Trusted Shops, I understand how businesses actually use APIs - leading to more practical, integration-friendly design decisions.

Client-Focused Solutions

Technical sales experience means I design APIs thinking about the end-user experience and business requirements, not just technical elegance.

Business Process Automation

Experience with N8N and process automation at UNIT informs how I design APIs for seamless system integration and workflow automation.

Technical Skills Development

Currently advancing backend development skills through C#/.NET and Python training, combined with practical SQL database design experience.

Ready to Build Together?

Let's discuss how my unique combination of business insight and technical skills can contribute to your development team.

Get In Touch Connect on LinkedIn