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WHITEPAPER

How a Platform Team Shipped an Internal Developer Platform in 120 Days

A platform engineering playbook for VPs of Platform delivering an IDP that engineers actually use.

An Internal Developer Platform in 120 Days Guide

The IDP your team is building has been 'almost ready' for nine months.

Engineers route around it.

  • Most IDPs fail because they are built like infrastructure projects, not like products.

  • The product discipline that wins is to define the golden path first — the most common workflow, end to end, that the IDP will optimize.

  • Working primitives over half-built ones.

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The numbers that make this a board-level conversation

18 of 22
Voluntary IDP adoption
96%
Time to deploy a new service - reduction
97%
Time to provision a new database - reduction

The 120-day program that gets you there

Weeks 1–3 - Golden path definition and MVP

Pick the single most common workflow. Probably 'deploy a new microservice' or 'add a new database.' Map every step engineers do today.

Weeks 4–7 - Adoption with paired support

Roll out to additional teams, one team at a time, with paired support from the platform team for the first week per team. The pairing surfaces friction and feeds the next iteration.

Weeks 8–10 - Expand the golden path and harden

Add the second golden path (provisioning, secret management, or runbook automation are common). Harden the first golden path based on adoption feedback.

The platform engineering checklist every VP Platform needs

Golden path definition and MVP

Pick the single most common workflow.

Adoption with paired support

Roll out to additional teams, one team at a time, with paired support from the platform team for the first week per team.

Expand the golden path and harden

Add the second golden path (provisioning, secret management, or runbook automation are common).

Engineers adopt the IDP voluntarily and routinely.

If your IDP has been 'almost ready' for nine months, the answer is not more features.

Frequently Asked Questions

First golden path can be delivered by 4 to 6 engineers. Scaling adoption needs a PM and 2 more engineers. We have shipped MVPs with smaller teams when paired with our embedded engagement.

Mix. Buy for capabilities with mature commercial offerings (CI/CD platforms, secret management). Build for opinionated workflow that is unique to your engineering culture.

We re-scope to a single golden path, sunset the unused capabilities, and rebuild adoption from a narrow base. We have done this rescue four times in 2025-26.