I enjoy building backend applications with modern JavaScript and learning by creating real-world projects. My interests include backend engineering, authentication, APIs, background job processing, distributed systems, and scalable architectures.

I'm currently looking for Backend Engineer / Software Engineer opportunities while continuing to improve my backend development skills.

• 💻 Self-taught backend developer
• 🏗️ Interested in backend engineering, system design, and distributed systems
• 🎯 Looking for Backend Engineer / Software Engineer opportunities
• ⚡ I enjoy building projects that explore real backend concepts like queues, webhooks, authentication, API gateways, and real-time communication.

• JavaScript (ES6+)
• SQL
• HTML5
• CSS3
• Java

• Node.js
• Express.js
• Mongoose
• Passport.js
• BullMQ
• Socket.io
• JWT
• Zod
• bcrypt

• MongoDB
• PostgreSQL(core)
• Redis

• Google Gemini API
• ImageKit
• Upstash Redis
• Resend Email API
• MongoDB Atlas

• REST API Design
• Authentication & Authorization
• JWT & Google OAuth
• RBAC
• Queue-Based Processing
• Background Workers
• Webhook Systems
• API Gateway
• Rate Limiting
• Circuit Breaker Pattern
• Retry & Exponential Backoff
• Dead Letter Queue
• Middleware Architecture

• Git
• GitHub
• Docker
• Postman
• Swagger
• Render
• Railway
• Vercel

Project management platform featuring multi-tenancy, role-based access control, JWT authentication, Google OAuth, Kanban boards, Redis caching, and real-time collaboration.

Tech: Node.js • Express • MongoDB • Redis • Socket.io

AI-powered interview preparation platform with secure authentication, resume-based interview generation, mock interviews, and personalized feedback.

Tech: Node.js • Express • MongoDB • Google Gemini API • JWT • ImageKit

Email processing service using BullMQ and Redis for asynchronous background jobs.

Highlights

• Background workers
• Retry mechanism
• Dead Letter Queue
• Queue architecture
• PostgreSQL persistence

Centralized API Gateway with authentication, rate limiting, request routing, logging, and circuit breaker support.

Highlights

• JWT Authentication
• Redis Rate Limiting
• Circuit Breaker
• Reverse Proxy
• Request Logging

Webhook delivery platform with retries, HMAC signature verification, event tracking, and delivery logs.

Highlights

• HMAC Signature Verification
• Retry Logic
• Exponential Backoff
• Delivery Tracking
• PostgreSQL Storage

Authentication system focused on secure login, authorization, abuse prevention, and production-ready security practices.

📧 Email: siddhi.singh561@gmail.com

💼 LinkedIn: https://www.linkedin.com/in/siddhi--singh

🌐 Portfolio: https://siddhi561.github.io/Portfolio/

"Always building. Always learning."