Nubank . Fintech

Agent-driven migration of a multi-million line ETL monolith

Production

Pilot

Production

Scaled

Killed

Data, Collections, and Risk business units verified and completed their migrations in weeks instead of months or years.From the source, 2026-10-17 (source shows no clear date; this is when we checked it)

What happened

Nubank needed to split its core ETL system, an eight-year-old monolith with over 6 million lines of code, into smaller sub-modules, a job expected to involve more than 1,000 engineers over about 18 months. In a case study published by the vendor, Cognition, Nubank engineers handed the repetitive refactoring to Devin. The case study says the Data, Collections and Risk units completed their migrations in weeks instead of months or years. This is a vendor-published account.

Sources

How Nubank refactors millions of lines of code with Devin (Cognition)

Company: Nubank
Industry: Fintech
Vendor / platform: Cognition (Devin)
Type: Coding agent
Status: Production
Evidence date: 2026-10-17 (source shows no clear date; this is when we checked it)
Source: https://devin.ai/customers/nubank
Notes: Vendor-published case study.
Last checked: 2026-10-17

Status reflects only what the linked source states on the evidence date. If it changed, Suggest an update.