ToolsSeptember 15, 2026via Vercel Blog
How Delphi ships 100 times a day with its Python backend on Vercel
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.
Key signals
- Delphi 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
The hook
100+ deploys a day. How a 10-person startup built its Python backend on Vercel — and let agents ship code.
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
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