Hi, I'm Himanshu — an Engineering Manager with 10+ years in the trenches of backend engineering, distributed systems, and payments infrastructure. I currently lead a 10-engineer team architecting platforms that process 10 million+ transactions a day, and I've spent a decade collecting the scars, the war stories, and the "why did production go down at 2 AM" lessons that no course teaches you. Over these 10 years, I've touched nearly every layer of the stack — from JVM internals to distributed messaging to database architecture — across telecom, HR-tech, healthcare, and fintech/payments. I've led migrations, fixed 2 AM outages, designed systems from scratch, and mentored engineers into architects. I've made the mistakes so you don't have to. My 10 go-to technologies: Java (8 → 21 → 25) & Spring Boot Kafka & RabbitMQ (distributed messaging) Redis & Caffeine (caching at scale) MySQL & MongoDB AWS (Certified Solutions Architect) Microservices & Clean Architecture REST API Design Docker & CI/CD Distributed Tracing and Observability System Design (HLD/LLD) How I can help you: System Design interviews — HLD, LLD, real trade-off discussions, not textbook answers Backend architecture deep-dives — Kafka, Redis, databases, microservices, resilience patterns EM/Tech Lead/Architect career transitions — the questions nobody prepares you for Mock interviews that feel like the real (sometimes weird) thing Career strategy — because 10 years in, I've seen what actually moves the needle My commitment: whatever we work on together, you get a 10 on 10 effort. No fluff, no generic advice — just real experience, real systems, real answers. Got 10 questions? Bring them. Let's get you ready.