Hi, I’m Karzan Hashem, a Senior Full Stack Engineer with 8+ years of experience building scalable, high-traffic web applications across fintech, marketing, and e-commerce. I specialize in React, Next.js (SSR), Node.js, Python, and Java, and I design cloud-native architectures on AWS and Azure. I enjoy solving real-time systems, payment integrations, A/B testing, observability with DataDog and Sentry, and exploring AI-driven product features including RAG-based LLM integrations to enhance user experiences. I thrive on turning complex business goals into reliable software, collaborating closely with designers and product managers, and continuously refining systems through data-driven insights. I’m passionate about shipping high-quality code, improving site reliability, and mentoring teammates to grow together.…Hi, I’m Karzan Hashem, a Senior Full Stack Engineer with 8+ years of experience building scalable, high-traffic web applications across fintech, marketing, and e-commerce. I specialize in React, Next.js (SSR), Node.js, Python, and Java, and I design cloud-native architectures on AWS and Azure. I enjoy solving real-time systems, payment integrations, A/B testing, observability with DataDog and Sentry, and exploring AI-driven product features including RAG-based LLM integrations to enhance user experiences. I thrive on turning complex business goals into reliable software, collaborating closely with designers and product managers, and continuously refining systems through data-driven insights. I’m passionate about shipping high-quality code, improving site reliability, and mentoring teammates to grow together.WWWW…