Discussions & Peer Learning
Connect, debate architectures, and collaborate with practicing AI Engineers.
How are you handling semantic cache invalidation with Redis + pgvector?
We're currently using Redis cosine similarity for cache hits (threshold 0.94), but encountering cache staleness when our underlying knowledge base updates. Has anyone implemented automated key tagging or event-driven cache invalidation hooks in LangChain/LlamaIndex?
Building custom MCP server in Python for internal Postgres schemas
Just migrated our function-calling scripts to the Model Context Protocol (MCP). The latency overhead is negligible (<8ms) and Claude 3.5 Sonnet handles the JSON-RPC tool schemas remarkably well. Highly recommend checking out Chapter 5 lessons!
Cracked the Forward Deployed Engineer (FDE) interview loop — Key learnings
Just accepted an FDE offer at an AI unicorn! The system design interview was 100% focused on latency budgets, multi-tenant VPC security, and handling tool-calling timeouts. The exercises in the FDE roadmap were literally identical to the take-home challenge.