The SingleStore Hackathon has opened, offering $30K in cash prizes and other incentives for developers to contribute their software applications using the SingleStoreDB database. To get started, developers need to register on the hackathon website, create a free Devpost account, and sign up for a free SingleStore account with $600 of credits. They can then choose one of five categories - multi-model, HTAP, Wasm/WebAssembly, Machine Learning/AI, or Database Migration - and build an application that fits their chosen category. The submission requirements include linking to the application code on GitHub, creating a video demonstrating the application's features, and providing contact information. Developers can access resources and documentation for each category to help them get started with SingleStoreDB.