Plaid’s engineering team of 360+ engineers supports a developer customer base of over 6,000+ financial apps and services, requiring the development of internal products that optimize common workflows to increase internal velocity. To address scaling challenges, Plaid's Developer Efficiency Team created "Devenv", an internal CLI tool backed by a remote environment, which has significantly improved developer efficiency over the last couple years. The team defined Devenv as a command-line interface (CLI) tool used to power various development workflows and test suites in their continuous integration (CI) environment, allowing developers to build, debug, and run services from the command line. By introducing a CLI aimed at giving developers an interface that abstracted away complexity, the team improved developer efficiency by facilitating cross-repo development, providing simplified service lifecycle controls, and enabling groups of services to be tested in context. The Devenv interface was extended over time to include tools for iterating on documentation and feature flags, before being shifted to a remote environment in the cloud to improve performance and reliability. This transition enabled faster build times, reduced Docker image pull times, and improved debuggability, with 87% of users exclusively using the Remote Devenv and 97% of all commands run on it. The team continues to optimize Devenv for the cloud, using techniques such as volume mounts, rsync, and Watchman to improve iteration workflows and reduce latency. Today, Devenv powers over 150 services and is run >2,000 times a day by developers, becoming an everyday tool and necessity in Plaid's engineering environment.