I'm Himanshu - currently a Senior Principal Software Engineer at Zeni, where I work on the backend and ML systems behind AI-driven vendor categorization and bookkeeping automation: data pipelines, model integration, and the unglamorous plumbing that decides whether an AI's answer can be trusted by an accountant. Before fintech, I was building real-time multiplayer game servers - which, it turns out, teaches you more about handling concurrency and things breaking at 2 a.m. than most "enterprise" jobs do. In between, I've led engineering teams at Coding Ninjas (ed-tech, student platform), owned core order and logistics systems at 1mg, and grown from senior engineer to tech lead at Lifefront Cover. What ties it together: security, infrastructure, and performance - and a habit of caring more about the systems that don't get noticed than the features that do. I mentor engineers who want to get better at backend system design, break into fintech/AI engineering, or figure out the jump from senior engineer to tech lead - because someone did the same for me, and it mattered. What I can help with (session topics) Backend system design : Architecture reviews, scaling decisions, and the trade-offs nobody tells you about until production breaks. Fintech & AI engineering : Building ML/LLM-powered features on real data - vendor intelligence, categorization, pipelines that need to be right, not just clever. Career growth for engineers : The senior → tech lead → principal path -what actually changes, and how to prep for it before the title does. Technical leadership : Leading a team, shipping consistently, and not burning everyone (including yourself) out in the process.