The increasing complexity of software systems and the widespread adoption of agile and DevOps practices have emphasized the need for robust, automated Continuous Integration (CI) pipelines. Integrating CI pipelines using tools such as GitHub Actions and Jenkins, combined with comprehensive end-to-end (E2E) test automation frameworks, is central to achieving high software delivery velocity and maintaining code quality. This explores the strategic integration of these technologies to streamline development workflows, reduce human error, and ensure early defect detection in modern software engineering environments. GitHub Actions provides a native, event-driven CI/CD platform tightly coupled with repository management, enabling developers to define and orchestrate workflows through declarative YAML syntax. Jenkins, a widely adopted automation server, offers extensibility and flexibility through plugins and scripted pipelines, making it ideal for complex, cross-platform builds and legacy system support. The combination of GitHub Actions and Jenkins allows organizations to leverage the strengths of both tools—lightweight declarative automation alongside mature, customizable orchestration. E2E testing frameworks such as Cypress, Playwright, and Selenium are essential components of the integrated pipeline, enabling simulation of user interactions and system behaviors across diverse environments. When embedded within CI workflows, these tools enable early validation of application functionality, regression testing, and performance monitoring before production deployment. The integration of CI tools with test automation frameworks provides not only accelerated feedback loops but also a foundation for shift-left testing and continuous quality assurance. Key considerations include test parallelization, artifact storage, environment provisioning, and failure diagnostics. This examines implementation strategies, tooling synergies, and real-world deployment patterns for integrating CI pipelines using GitHub Actions, Jenkins, and E2E test frameworks. The goal is to provide a practical reference for teams aiming to enhance reliability, maintainability, and scalability of their software delivery processes through intelligent automation.