Devin is an AI programming assistant designed to help engineering teams enhance efficiency through the automation of code migration, refactoring, and related tasks. It is capable of self-learning, responding to natural language requests, and collaborating in real-time with users. Devin's technology is based on Nubank's large-scale code migration project that involved migrating an 8-year-old monolithic ETL system containing millions of lines of code into sub-modules. By automating these repetitive tasks, Devin delivered a 12-fold increase in engineering time efficiency and saved Nubank 20 times the cost.