** Resolved high-priority bugs to achieve 99.9% application uptime, minimizing downtime and ensuring a seamless user experience.** Collaborated with product, design, and QA teams to enhance product quality, resulting in 95% customer satisfaction through effective communication and swift feedback loops.** Implemented security best practices, including encryption and vulnerability scanning, leading to a 50% improvement in system security and safeguarding critical data.** Upgraded outdated code and optimized database queries, improving execution times, responsiveness, and overall system reliability.** Conducted code migrations and modernized legacy codebases, reducing technical debt, enhancing scalability, and ensuring compatibility with modern frameworks.