How Delphi ships 100 times a day with its Python backend on Vercel
100+ deploys a day. How a 10-person startup built its Python backend on Vercel — and let agents ship code.
Why it matters
A case study in modern deployment infrastructure: how moving backend infrastructure to a managed platform (Vercel) enabled Delphi to ship at agent-scale velocity and let non-engineers (product, design, internal agents) deploy to production safely via feature flags and preview deployments.
The key facts
19 to knowDelphi moved Python backend from AWS/ECS to Vercel 6 months ago
Now ships 100+ production deploys per day behind feature flags
10 engineers, no dedicated infrastructure role
New engineer onboarding reduced from 1 day of setup to fast path via same deploy workflow
Uses Vercel Workflows for long-running agentic work and Queues for background jobs
Product and design teams now deploy dashboards and experiments themselves
Agents use preview deployments as first check of their work output
Internal Slack agent built on Vercel Sandbox (eve framework) handles customer success triage
AI Gateway routes to different models per customer/experiment; handles failover
Moved from staging→production release cadence to direct-to-production with feature flags and A/B tests
Delphi moved Python backend from AWS (ECS, Docker, local DBs) to Vercel
100+ production deploys per day behind feature flags
New engineer onboarding reduced from ~1 day to minutes
Uses Vercel Workflows for long-running agent work, Queues for background jobs
Uses Vercel AI Gateway for model routing and failover across providers
Internal Slack agent on Vercel Sandbox for customer success triage
Product and design teams ship dashboards and experiments themselves
Preview deployments enable agent-generated work review before merge
Skipped staging environment; ships directly to production with feature flags and A/B tests
Go to the source
Vercel Blogvercel.com
Publisher excerpt: Delphi on Vercel The backend slowed every change Preview deployments are how agents check their work 10 engineers with no dedicated infrastructure role Everyone ships code, including product and design 100+ production deploys a day behind feature flags builds digital minds. They capture what…