Engineering blog
Field notes on interview engineering.
System design, databases, low-level design, AI engineering, and coding patterns, explained the way interviewers actually probe them.
All articles·3
AI EngineeringLlm
How Retrieval-Augmented Generation (RAG) Works
How RAG works end to end: chunk and embed your documents, retrieve the relevant context at query time, and ground an LLM's answer. The pipeline, the tradeoffs, and when not to use it.
Anand Singh··8 min read
System DesignDistributed Systems
The Saga Pattern: Distributed Transactions Across Microservices
The saga pattern for microservices: coordinate a transaction across services without 2PC, undo with compensating transactions, choose choreography vs orchestration, and nail the tradeoffs interviewers probe.
Anand Singh··11 min read
System DesignDistributed Systems
The Outbox Pattern: Reliable Messaging in System Design
The transactional outbox pattern: publish events reliably, fix the dual-write problem, choose between polling and CDC, and nail the system design tradeoffs interviewers probe.
Anand Singh··7 min read