Software development involves two critical processes: the Software Development Life Cycle (SDLC) and the Software Testing Life Cycle (STLC), which together ensure the creation of high-quality software. While SDLC covers the entire development process from planning to maintenance, STLC focuses specifically on testing phases to validate software functionality, performance, and security. Integrating these cycles leads to early defect detection, improved collaboration, and optimized development through automation. Tools like LambdaTest facilitate this integration by offering AI-native solutions that automate testing processes, provide real-time insights, and streamline workflows, ultimately enhancing software quality and accelerating release cycles. Understanding and effectively applying both SDLC and STLC is essential for delivering reliable, scalable, and functional software that meets user expectations and adapts to fast-evolving market demands.