Resilience testing is a crucial aspect of the Software Development Life Cycle (SDLC), ensuring business services remain reliable during system disruptions, especially under high load. The article provides a detailed guide on implementing resilience testing using Grafana K6 for load testing and Harness Chaos Engineering for chaos experiments, with a focus on an e-commerce application deployed on Kubernetes. The process involves setting up roles and permissions, deploying necessary tools like the Harness Delegate, and creating resilience probes to monitor system health. The integration of load testing with chaos engineering aims to prepare systems for real-world failures by validating their performance and reliability when key components malfunction under stress. The guide outlines steps for signing up on the Harness platform, setting up a testing environment, and running parallel chaos experiments and load tests to measure system resilience. This combined approach enables teams to transition from theoretical planning to practical application, enhancing the system's ability to withstand real-world challenges.