Hi, I'm Shahzaib — a Senior Software Engineer with 7+ years building production systems for companies across E-commerce, FinTech, and now HealthTech. I currently ship at a $100M+ revenue product company, where I work on performance-critical, regulated, high-traffic applications used by users worldwide. What I bring to the table: deep expertise in React, Node.js, React Native, Firebase, and modern frontend architecture — plus the systems thinking that comes from shipping in regulated industries (payments compliance, PII/PHI handling, audit-ready code). I've optimized checkout funnels worth six figures, designed trading-grade UIs where milliseconds matter, and I'm now applying that rigor to HealthTech where reliability is non-negotiable. I mentor engineers who want to: • Break into senior roles at top product companies • Switch domains into FinTech or HealthTech • Level up frontend system design and interview performance • Navigate the jump from mid-level to senior If you're stuck on career direction, interview prep, or a tricky technical decision — let's talk.