S

SankalpRaiGambhir

Engineering Insights

Articles and insights on software engineering, architecture, and technology.

5Articles

Postgres query plan diagram showing an index scan replacing a full table scan

The Client Thought They'd Outgrown Postgres. They Hadn't.

A client was sure they'd outgrown Postgres and wanted more pods, replicas, and shards. The real problems were one missing index and a connection storm — two-day fixes, not a re-architecture.

PostgreSQLDatabase PerformanceBackend

Agent control-flow diagram showing a runaway tool-call loop bounded by circuit breakers

Our AI Agent Made 2,000 Tool Calls to Do Nothing

What an autonomous agent taught me about cost, control flow, and why reliability isn't a model-intelligence problem.

AI AgentsLangGraphReliability Engineering

LLM cost optimization dashboard showing token usage and spend trending down

Our LLM Bill Hit $14K a Month. I Cut It 70% — Without Cutting Quality

How instrumenting LLM spend, fixing prompt bloat, model routing, and safe caching cut a $14K/month AI bill by 70% without hurting quality.

LLMAI EngineeringCost Optimization

GraphQL schema diagram illustrating nested entity relationships

GraphQL Didn't Remove Our API Complexity — It Exposed It

Key insights and best practices learned while building production GraphQL APIs

GraphQLAPI DesignBackend

RAG retrieval pipeline diagram showing chunking, vector search, and reranking stages

Our RAG Chatbot Answered Confidently — From the Wrong Document

How scaling decisions around chunking, vector search, quantization, and reranking quietly made our production RAG system less accurate.

RAGVector SearchAI Engineering

Production post-mortems and engineering decisions on AI, backend systems, reliability, and cost. Get a short email when a new insight is published.

This site uses analytics cookies to understand how visitors use it. See the Privacy Policy for details.