Senior Java developer, 10 years. I’ve built payment systems that handled millions of transactions a day at FIS (WorldPay), and I currently own the optimisation pipeline on a supply chain platform — Java 17, Spring Boot, Kafka, AWS, Kubernetes. Two things I can genuinely help with: getting your backend fundamentals sharp enough to clear senior interviews, and understanding how an Indian engineer actually gets hired into Europe with sponsorship. I’ll tell you what I know and what I don’t. If I can’t help, I’ll say so and refund.