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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.

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

#aws #devops #kubernetes #finops
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3 min read
Production AI & LLM Task Pipelines: Managing Token Budgets, Backpressure, and Asynchronous Queue Architecture
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Production AI & LLM Task Pipelines: Managing Token Budgets, Backpressure, and Asynchronous Queue Architecture

#ai #webdev #architecture #node
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2 min read
Distributed API Rate Limiting & Idempotency at Scale: Redis Keyspace Architecture & Lock Patterns
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Distributed API Rate Limiting & Idempotency at Scale: Redis Keyspace Architecture & Lock Patterns

#architecture #redis #node #webdev
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3 min read
Multi-Tenant Database Isolation: Schema-per-Tenant vs. Row-Level Security in Postgres
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Multi-Tenant Database Isolation: Schema-per-Tenant vs. Row-Level Security in Postgres

#postgres #database #saas #architecture
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2 min read
Zero-Downtime Database Migrations at Scale: Dual-Writing & Shadow Testing
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Zero-Downtime Database Migrations at Scale: Dual-Writing & Shadow Testing

#database #postgressql #postgres #architecture
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2 min read
Engineering a Low-Latency WebSocket Pipeline for Live PSX Market Feeds
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Engineering a Low-Latency WebSocket Pipeline for Live PSX Market Feeds

#node #architecture #redis #webdev
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2 min read
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