Rahul Sabui

Backend Software Engineer

Architecting scalable systems | Building high-performance APIs | Passionate about clean code

const developer = {
  name: "Rahul Sabui",
  role: "Backend Engineer",
  expertise: ["APIs", "Microservices", "Database"],
  impact: "50K+ daily transactions",
  status: "available"
}

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About Me

I'm a Backend Software Engineer with 4+ years of experience designing scalable distributed systems and building high-performance APIs.

At Kloudz Computing, I architect REST APIs serving 20K+ daily requests and designed microservices handling 50K+ monthly transactions. I've reduced API latency by 35% through optimization, implemented webhook-based event processing, and built secure payment integrations.

Previously at Techwens Software, I led backend development for CRM and payment platforms supporting 10K+ users, designed normalized database schemas, and reduced production incidents by 25% through structured monitoring.

I'm passionate about building reliable systems, optimizing performance, and solving complex architectural challenges. When I'm not coding, I'm exploring new technologies and contributing to open-source projects.

Years Experience

50K+

Monthly Transactions

99.9%

API Uptime

Production Systems

Kloudz Computing

Software Development Engineer

Apr 2025 – Present

Techwens Software

Backend Developer

Oct 2021 – Mar 2025

MAKAUT University

B.Tech in Electrical Engineering

2017 – 2021

Technical Skills

Languages

JavaScript (Node.js)

Python

SQL

Backend

Express.js

Hono.js

FastAPI

REST APIs

Databases

PostgreSQL

MySQL

MongoDB

Redis

Cloud & DevOps

AWS (EC2, S3)

Docker

GitHub Actions

Cloudflare Workers

Architecture

Microservices

Distributed Systems

Webhooks

Rate Limiting

Payment & APIs

Stripe

PayU

Cashfree

OAuth

JWT

Professional Experience

Kloudz Computing Pvt Ltd

Software Development Engineer

Apr 2025 – Present

✓

Architected scalable REST APIs serving 20K+ daily requests with 99.9% uptime

✓

Designed microservices-based payment system handling 50K+ monthly transactions

✓

Reduced API response latency by 35% through query optimization and Redis caching

✓

Implemented secure webhook validation and idempotent transaction processing

✓

Containerized services using Docker and implemented CI/CD pipelines

Node.jsExpress.jsPostgreSQLRedisDockerAWS

Techwens Software Ltd

Backend Developer

Oct 2021 – Mar 2025

✓

Led backend architecture for CRM and payment platforms supporting 10K+ active users

✓

Designed normalized PostgreSQL schemas reducing query cost by 30%

✓

Implemented JWT-based authentication and role-based authorization systems

✓

Built multi-tenant backend architecture enabling scalable merchant onboarding

✓

Reduced production incidents by 25% through structured logging and monitoring

Node.jsExpress.jsReact.jsPostgreSQLMongoDBAWS

Featured Projects

Payment Aggregator

Multi-gateway architecture integrating Stripe, PayU, Cashfree with reconciliation handling 2K+ daily transactions. Secure APIs with comprehensive transaction management.

Multi-gateway integration

Transaction reconciliation

2K+ daily transactions

Webhook-based processing

Knighthunt E-Commerce

→ Visit

Dynamic e-commerce platform specializing in t-shirt sales with seamless shopping experience. Integrated Cashfree for payments and Shiprocket for delivery, deployed on AWS.

5K+ monthly orders

Optimized checkout

Payment integration

Delivery tracking

Valet Parking (US Client)

→ Visit

Scalable valet parking system with real-time tracking and efficient resource management. Deployed on Cloudflare Workers achieving sub-100ms latency.

Sub-100ms latency

Serverless architecture

Real-time tracking

High availability

CRM System

Comprehensive customer relationship management platform for managing customer interactions, company data, and lead tracking. PostgreSQL-backed with optimized schemas.

Customer management

Lead tracking

Data analytics

Optimized queries