A top priority for Java apps — whether running on physical servers, VMs, or in the cloud — is continuous availability, which can create a costly burden of maintaining infrastructure resources. Quarkus is an open-source Java framework that solves traditional frameworks' weaknesses, including heavy memory consumption and issues scaling in container environments. With Quarkus, Java developers can use familiar technology to build cloud-native microservices and serverless functions.

This Refcard demonstrates how to get started with Quarkus for serverless function development, jumping right into scaffolding a Java serverless project. Readers will also learn how to optimize functions, implement continuous testing, make portable functions across serverless platforms, and more!