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Backend · Node.js · NestJS · API_

Writing

Blog

Thoughts on backend engineering, system design & DevOps

GOKUL B S

GOKUL B S

Backend Developer

7 articles

Database Indexing & Query Optimization: Improving Backend Performance in SaaS

Slow queries can break your SaaS at scale. Learn how to use indexing and query optimization to improve backend performance with real examples.

DatabaseIndexingPerformance

Apr 10, 20269 min read

Idempotency in APIs: Handling Retries and Preventing Duplicate Operations

Retries can break your system if not handled properly. Learn how to implement idempotency in APIs to prevent duplicate payments and operations.

SaaSIdempotencyAPIs

Apr 10, 20268 min read

Event-Driven Architecture in SaaS: Designing Scalable Microservices with Kafka

Synchronous APIs don’t scale well in microservices. Learn how to design event-driven architecture using Kafka for scalable SaaS systems.

SaaSKafkaMicroservices

Apr 2, 20268 min read

Feature Flags in SaaS: Designing a Dynamic Feature Control System

Feature flags are not just toggles. Learn how to design a scalable feature control system in SaaS with real backend patterns and rollout strategies.

SaaSFeature FlagsBackend

Mar 28, 20267 min read

Tenant-Level Rate Limiting in SaaS: Designing Scalable Request Control

User-based rate limiting is not enough for SaaS. Learn how to design tenant-level rate limiting using Redis, algorithms, and distributed system patterns.

SaaSRate LimitingRedis

Mar 25, 20267 min read

Usage-Based Billing in SaaS: Designing a Scalable Metering System

Stripe handles payments, not your usage logic. Learn how to design a proper metering system for SaaS with real backend examples.

SaaSBillingNode.js

Mar 24, 20266 min read

Tenant Isolation in SaaS: Designing a Scalable Multi-Tenant Backend (Node.js)

Most SaaS apps fail not because of features, but because of poor tenant isolation. Learn how to properly design multi-tenant systems with real backend examples.

SaaSMulti-TenantNode.js

Mar 23, 20266 min read

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