I am Vikash Kumar, a backend engineer with 4+ years of experience at Games24x7 (My11Circle, RummyCircle),Tekion and currently working on large-scale distributed systems, Kafka pipelines, MongoDB, Redis, Spring Boot microservices, and high-throughput platforms. Over the last few years, I’ve mentored 100+ candidates in DSA, Java, System Design, and interview preparation. I regularly take mock interviews for startups and help candidates improve their thought process, communication, and problem-solving depth. I specialise in: • DSA patterns, brute-force → optimized approach • System Design (HLD + LLD) with real industry examples • Backend fundamentals (Java, Spring Boot, Kafka, Redis) • Behavioral round preparation • Resume review & role targeting strategy If you are preparing for SD1 → SD2 → SD3 roles at companies like Amazon, Hotstar, Razorpay, Uber, PhonePe, Conviva, or Intuit, I can help you build the clarity, confidence, and problem-solving skills needed to crack them. Book a session if you want structured guidance, mock interviews, or tailored preparation for your next big opportunity.