Usman Khan

Fractional CTO & Systems Architect. 13+ yrs engineering high-concurrency SaaS, low-latency WebSocket pipelines, & database architectures. Writing about real production scale at ctousman.com.

Joined on Sep 28, 2026

Usman Khan

Oct 13

PostgreSQL JSONB Write Amplification: TOAST Chunk Fragmentation and Unseen I/O Thrashing

#postgres #database #performance #sql

4 min read

Usman Khan

Oct 10

Server-Sent Events (SSE) Backpressure Breaks: Memory Leaks and Socket Starvation in High-Throughput LLM Pipelines

#ai #node #performance #javascript

4 min read

Usman Khan

Oct 9

PostgreSQL MVCC Autovacuum Starvation: HOT Update Breakdown & Table Bloat under Heavy Write Loads

#postgres #database #performance #sql

4 min read

Usman Khan

Oct 8

Production AI & LLM Pipelines: Guardrails, Streaming Resilience, and Cost-Aware Fallbacks

#ai #llm #node #typescript

3 min read

Usman Khan

Oct 7

Advanced System Architecture: Designing Multi-Tenant Event-Driven Queues with Fair-Share Scheduling

#architecture #redis #distributedsystems #backend

4 min read

Usman Khan

Oct 6

Zero-Downtime Database Migrations: Shadow Tables, Dual-Writing, and Schema Expansion

#database #postgres #devops #architecture

4 min read

Usman Khan

Oct 5

Advanced System Architecture: Designing Multi-Region Read Replicas and Global Data Consistency

#architecture #postgres #database #distributedsystems

3 min read

Usman Khan

Oct 3

Microservices Event Pipelines: Outbox Pattern, CDC, and Idempotent Event Sourcing

#microservices #kafka #postgres #architecture

4 min read

Usman Khan

Oct 3

Asynchronous ERP Sync Engine: High-Throughput Webhook Ingestion & Durable Queue Orchestration

#node #typescript #redis #architecture

2 min read

Usman Khan

Oct 2

Cloud Infrastructure Cost Optimization: FinOps Engineering, Graviton Migrations, and Auto-Scaling

#aws #devops #kubernetes #finops

3 min read

Usman Khan

Oct 1

Production AI & LLM Task Pipelines: Managing Token Budgets, Backpressure, and Asynchronous Queue Architecture

#ai #webdev #architecture #node

2 min read

Usman Khan

Sep 30

Distributed API Rate Limiting & Idempotency at Scale: Redis Keyspace Architecture & Lock Patterns

#architecture #redis #node #webdev

3 min read

Usman Khan

Sep 29

Multi-Tenant Database Isolation: Schema-per-Tenant vs. Row-Level Security in Postgres

#postgres #database #saas #architecture

2 min read

Usman Khan

Sep 28

Zero-Downtime Database Migrations at Scale: Dual-Writing & Shadow Testing

#database #postgressql #postgres #architecture

2 min read

Usman Khan

Sep 28

Engineering a Low-Latency WebSocket Pipeline for Live PSX Market Feeds

#node #architecture #redis #webdev

2 min read

DEV Community

Usman Khan

Badges

Writing Debut

PostgreSQL JSONB Write Amplification: TOAST Chunk Fragmentation and Unseen I/O Thrashing

Server-Sent Events (SSE) Backpressure Breaks: Memory Leaks and Socket Starvation in High-Throughput LLM Pipelines

PostgreSQL MVCC Autovacuum Starvation: HOT Update Breakdown & Table Bloat under Heavy Write Loads

Production AI & LLM Pipelines: Guardrails, Streaming Resilience, and Cost-Aware Fallbacks

Advanced System Architecture: Designing Multi-Tenant Event-Driven Queues with Fair-Share Scheduling

Zero-Downtime Database Migrations: Shadow Tables, Dual-Writing, and Schema Expansion

Advanced System Architecture: Designing Multi-Region Read Replicas and Global Data Consistency

Microservices Event Pipelines: Outbox Pattern, CDC, and Idempotent Event Sourcing

Asynchronous ERP Sync Engine: High-Throughput Webhook Ingestion & Durable Queue Orchestration

Cloud Infrastructure Cost Optimization: FinOps Engineering, Graviton Migrations, and Auto-Scaling

Production AI & LLM Task Pipelines: Managing Token Budgets, Backpressure, and Asynchronous Queue Architecture

Distributed API Rate Limiting & Idempotency at Scale: Redis Keyspace Architecture & Lock Patterns

Multi-Tenant Database Isolation: Schema-per-Tenant vs. Row-Level Security in Postgres

Zero-Downtime Database Migrations at Scale: Dual-Writing & Shadow Testing

Engineering a Low-Latency WebSocket Pipeline for Live PSX Market Feeds