What we planned vs. what we shipped: A platform migration story

Justin Abrahms walks through the full arc of Trellis, Thrive Market's internal platform, from a Confluence document of grand ideas to 100% migration off EC2 in under 18 months.

Justin covers:
• The before state: Developers waited on ops for everything, and ops was drowning in insecure legacy infrastructure.
• Why the migration actually happened: Developers gained locus of control, and ops got to delete years of technical debt.
• How the proposal changed during implementation: What the grand ideas were versus what shipped.
• What 100% migration looked like from both sides: Developer experience and operational reality.
• Where the platform was headed next.

This is a practitioner account of a real migration, not a success story. It includes what changed mid-build and why.