ALL SYSTEMS OPERATIONAL — CLUSTER HEALTHY
Backend Infrastructure Engineer Distributed Systems / Microservices / Data Pipelines
> Architecting resilient systems that handle millions of requests,
> process terabytes of data, and maintain 99.9% uptime under load.
Throughput
2.4M+
Daily requests handled across production platforms with sub-15ms latency
Availability
99.9%
Payment gateway & notification system SLA with idempotent retry logic
Scale
23M+
Users served via authentication & data migration systems at GFG
Optimization
-95%
Delivery time reduction via event-driven Kafka + Redis orchestration
[TRAFFIC]
Request Lifecycle
LIVE: tcpdump -i eth0 port 443 -w /tmp/traffic.pcap
Client Request
Load Balancer
Backend Node
Cache Hit
DB Query
Response
Up arrow: Watch requests flow: Client -> Load Balancer -> Backend Node -> (Cache or DB) -> Response
[SYSTEM]
Architecture
Runtime & Languages
Compute Layer — Node.js Cluster
Node.js
95%
TypeScript
92%
Java
78%
Python
72%
Data & Storage
Persistence Layer — Sharded
MongoDB
94%
PostgreSQL
90%
Redis
88%
Cassandra
80%
Messaging & Events
Queue Layer — Event-Driven
Kafka
92%
BullMQ
88%
Redis Pub/Sub
85%
Temporal
82%
API & Design Patterns
Gateway Layer — RESTful
REST APIs
96%
Microservices
93%
System Design
90%
Payments
88%
[LOGS]
Production Logs
tail -f /var/log/career.log --follow --retry
INFO
- Architected multi-tenant SaaS platform supporting multiple brands via single app instance with tenant isolation
- Implemented brand-level configuration engine: app theming, page-wise feature control, catalog management
- Built admin plug-and-play dashboard for dynamic feature toggles with automatic app behavior changes
- Designed config-driven loyalty system handling physical & digital reward redemption workflows
SUCCESS
- Architected core Order Management System: cart creation -> rider assignment -> real-time order tracking
- Built real-time delivery orchestration engine in TypeScript using Kafka + Redis Streams
- Achieved 95% reduction in average delivery time via event-driven assignment & live location streaming
- Designed hybrid notification system (Kafka + Redis Pub/Sub): 99.9% reliability, thousands of real-time notifications
- Developed dual-sided financial ledger & wallet: 10K+ daily transactions, restaurant settlements, credit limits, rewards
- Integrated Razorpay & PayU with idempotent APIs, circuit breaker pattern, retry logic, webhooks: 99.9% success rate
WARN
- Managed user data tracking: 2-3M+ daily entries into Cassandra for content strategy & engagement analytics
- Migrated 23M+ user database MySQL -> MongoDB: zero-downtime migration, improved scalability, reduced latency by 40%
- Architected durable execution layer with Temporal.io: eliminated 90% partial failure states in async workflows
- Engineered JWT + social login auth system serving 23M+ registered users with secure session management
INFO
[SERVICES]
Deployed Services
ScreenSafe Browser
OPERATIONAL — 99.8% UPTIME
Privacy-focused browser enabling discreet access to sensitive content during screen sharing. Subscription-based SaaS with secure session handling, background process management, and access control.
2K+
Monthly Users
100+
Paid Subs
10K+
Monthly Visits
Order Management System
OPERATIONAL — 99.9% UPTIME
Complete food e-commerce lifecycle backend. Real-time delivery orchestration with event-driven architecture, financial ledger, dual-sided wallet, and multi-gateway payment integration.
10K+
Daily TXNs
99.9%
Reliability
-95%
Latency Drop
Auth & Identity Service
OPERATIONAL — 99.99% UPTIME
Authentication & identity system serving 23M+ users with JWT-based security, social login integration, durable workflow orchestration using Temporal.io, and zero-downtime database migration.
23M+
Users
-90%
Failures
3M+
Daily Logs
[DOCS]
System Documentation
resume.pdf — Read-Only Replica — v2.0.0
[GATEWAY]
API Gateway
GET /api/v1/contact/endpoints — 200 OK
base_url: rahulkushwaha.dev | rate_limit: 1000/hr | auth: none