Building a reliable Next.js application capable of handling long-running tasks, such as processing large files, handling webhooks, or scheduling email batches, is challenging due to HTTP request timeout limitations. Traditionally, this requires setting up and maintaining additional infrastructure with a queueing system like BullMQ. However, DBOS offers an alternative by allowing developers to execute these tasks directly within a Next.js app using an open-source TypeScript library that relies on storing execution states in a database. This enables tasks to resume seamlessly after failures or interruptions, maintaining continuity even if users disconnect or servers restart. A practical example demonstrates a simple app with two buttons for launching and crashing a background task, showcasing that tasks resume from the last stored checkpoint upon app restart. DBOS facilitates this process with decorators like @DBOS.workflow() and @DBOS.step(), ensuring tasks can be reliably managed without complex external systems. The library also supports other reliability features like task queuing and automatic retries, making it a versatile tool for enhancing the robustness of Next.js applications.