Senior Full Stack Engineer with 10+ years of experience building SaaS platforms, business web applications, admin tools, and secure backend systems. I work mainly with React, TypeScript, Node.js, REST APIs, PostgreSQL, and payment integrations, with a strong focus on production-ready delivery. I have built and improved multi-tenant application workflows, user/account management, dashboard features, backend APIs, SQL data models, and payment-related flows including Stripe-style subscriptions, webhooks, and transaction handling. I’m comfortable auditing existing codebases, refactoring technical debt, improving tenant-aware data access, and strengthening backend security around authentication, authorization, RBAC, and data privacy. I work well with founders and small teams that need a practical engineer who can understand the product, estimate effort clearly, improve existing code without unnecessary rewrites, and leave behind clean documentation for long-term maintenance.…Senior Full Stack Engineer with 10+ years of experience building SaaS platforms, business web applications, admin tools, and secure backend systems. I work mainly with React, TypeScript, Node.js, REST APIs, PostgreSQL, and payment integrations, with a strong focus on production-ready delivery. I have built and improved multi-tenant application workflows, user/account management, dashboard features, backend APIs, SQL data models, and payment-related flows including Stripe-style subscriptions, webhooks, and transaction handling. I’m comfortable auditing existing codebases, refactoring technical debt, improving tenant-aware data access, and strengthening backend security around authentication, authorization, RBAC, and data privacy. I work well with founders and small teams that need a practical engineer who can understand the product, estimate effort clearly, improve existing code without unnecessary rewrites, and leave behind clean documentation for long-term maintenance.WWWW…