Chaysen R.

Hands-On CTO | Senior Full-Stack Engineer | Stripe, Next.js & AI

Need a hands-on technical lead to stabilize, ship, or scale a SaaS product? I am a CTO and senior full-stack engineer with over a decade of experience delivering production SaaS, Stripe billing systems, AI-enabled applications, and cloud platforms. I work directly across Next.js, React, TypeScript, Node.js, PostgreSQL, Stripe, Azure/AWS, and CI/CD—from technical audit and architecture through implementation, deployment, and reliable handoff. Clients hire me to: • Take ownership of existing products with unclear architecture, broken integrations, or delivery risk• Build and ship complete SaaS features across frontend, backend, database, infrastructure, and deployment• Design and migrate Stripe billing systems: Checkout, subscriptions, webhooks, Customer Portal, and payment-state logic• Strengthen authentication, account isolation, APIs, cloud reliability, and long-term maintainability• Provide CTO-level technical judgment while remaining fully hands-on in the codebase Relevant experience: • CTO & Co-Founder, Klimado — owned architecture, infrastructure, APIs, and frontend delivery for an ESG/CSRD SaaS platform; shipped multiple production applications.• CTO, KEAZ — lead technical direction and end-to-end product delivery.• Senior Full-Stack & Cloud Engineer, hey circle — hands-on delivery across Node.js, TypeScript, React, Azure, CI/CD, Shopify, and WooCommerce integrations.• Founder, Chays N Dreams LLC — fractional CTO and senior engineering delivery for startups and scale-ups.• Recent billing and authentication API migration for a live SaaS product. I work especially well with founders, product leaders, and engineering teams who need clear technical ownership, predictable communication, and production-quality execution.