Posted inAWS
Lambda Powertools Node.Js: Structured Logs That Survive On-Call
A senior-engineer guide to Lambda Powertools Node.js, with production-ready patterns, trade-offs, and practical examples.
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Lambda Timeouts Retries: Idempotent Failure Handling
A senior-engineer guide to Lambda timeouts retries, with production-ready patterns, trade-offs, and practical examples.
Posted inAWS
AWS Lambda Cold Starts on Node.js and Python: Measure, Cut, and Keep Cutting
Measure and cut AWS Lambda cold starts on Node.js and Python: Init Duration, bundling, lean imports, memory, SnapStart and provisioned concurrency.
Posted inAI AWS Machine Learning
AI Code Review Bot IAM: Least-Privilege Secrets and Pipelines
AI code review bot IAM done right: GitHub App tokens, scoped Bedrock InvokeModel, Secrets Manager, and ephemeral jobs that see a PR diff — not monorepo admin PATs.
Posted inAI AWS Machine Learning
Amazon Bedrock Prompt Caching and Batch Inference: Cut Coding-Agent Latency and Cost Without Stale Rules
Bedrock prompt caching vs batch inference for coding agents: cachePoint placement, TTL, usage fields, JSONL batch jobs and stale-rule pitfalls.
Posted inAI AWS Machine Learning
OpenSearch vs pgvector vs S3 Vectors for Codebase RAG on AWS
OpenSearch vs pgvector vs S3 Vectors for code RAG on AWS: filtered ANN, pgvector iterative scans, OpenSearch hybrid search with RRF, S3 Vectors metadata pre-filtering, freshness and recall evaluation.
Posted inAI AWS Machine Learning
AWS Lambda Coding Agent Sandbox: Safe Tool Isolation for LLM Agents
Build an AWS Lambda coding agent sandbox: ephemeral tool Lambdas, tiny IAM, deny-by-default networking, and structured results — so agents can run tests without owning the account.
Posted inAI AWS Machine Learning
Amazon Bedrock Agents (Classic) in Production: Safe Tools, Memory, Guardrails and the Move to AgentCore
Amazon Bedrock Agents Classic in production: action group Lambda validation, requireConfirmation, sessionAttributes, SESSION_SUMMARY memory, guardrail configuration, and migration mapping to Bedrock AgentCore.
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CSS Pseudo-Classes and Pseudo-Elements: The Complete Styling Guide
A senior-engineer guide to CSS pseudo-classes, with production-ready patterns, trade-offs, and practical examples.
Posted inNode.js
Express.js Best Practices: Build Production-Ready APIs With Node.js
A senior-engineer guide to Express.js best practices, with production-ready patterns, trade-offs, and practical examples.