Devin is an AI software engineer capable of handling complex, end-to-end software development tasks autonomously. Built by Cognition Labs, Devin can write code, debug, test, and deploy applications while working alongside human engineers. It excels at large-scale refactoring, migration projects, and repetitive coding tasks, with proven results including 8-12x efficiency gains and 20x cost savings on major projects. Devin can be fine-tuned for specific codebases and tasks, learns from examples, and builds its own tools to improve performance over time. It handles discretionary tasks that are too complex for scripts but repetitive enough to benefit from automation, making it ideal for modernization projects and technical debt reduction.