KnowledgeBase Vector DB Migration
Published on: 04/05/2026
Migrated 54M docs MongoDB to OpenSearch, cut latency 20x, costs 42%, zero downtime rollout.
Engineering Management

Migrated 54M docs MongoDB to OpenSearch, cut latency 20x, costs 42%, zero downtime rollout.

How we built a pixel-perfect visual comparison tool for testing products at HighLevel — automating visual QA, catching invisible bugs, and teaching our tests to see like humans.

I’ve been thinking a lot about how AI is changing the way we build. Not just speeding things up, but completely shifting the operating model. I’ve been talking about this with different teams internally for a few weeks now. But I’ve noticed that the written word travels further—and reaches more people—than I can, so here goes.
Let's breakdown how exactly Highlevel manages its engineering processes and builds products