I’m Gurupreet Singh, a Software Engineer with 5+ years of experience building large-scale, high-performance systems across healthcare and travel-tech domains. I’ve worked with top companies like Oracle, Expedia, where I specialized in backend engineering, distributed systems, and cloud-native solutions. Over the years, I’ve designed microservices handling millions of requests, optimized data pipelines processing 10M+ daily events, and worked on healthcare tech. Beyond my technical expertise, I’m passionate about simplifying complex problems, mentoring others, and sharing practical strategies from real-world engineering challenges. On Topmate, I help students and professionals with system design, DSA, backend frameworks (Java, Go, Kotlin, Spring Boot, Micronaut, GRPC), cloud technologies (AWS, Kubernetes), and interview preparation. Whether you’re just starting out, preparing for product-based company interviews, or looking to scale your technical skills, I’ll provide clear, actionable guidance to help you reach your goals.