Senior Software Engineer with 8+ years designing, scaling, and maintaining web platforms across fintech, open finance, loyalty, and SaaS — serving millions of users in high-availability architectures. Proven track record of driving measurable impact: $120k in annual AWS savings, 4,000+ franchise stores onboarded, and 30% checkout completion improvements. Strong expertise in TypeScript, Node.js, React, Vue.js, and PHP, with deep experience in performance optimization, legacy modernization, and