Senior Full-Stack AI SaaS Developer | React, Next.js, Node.js, PostgreSQL, MongoDB, AWS, APIs, AI

I need an experienced senior full-stack developer to build and deploy a small but production-ready SaaS feature. The goal is to take a simple MVP requirement and turn it into a working web application feature that demonstrates clean frontend, backend, database, API integration and AI functionality... (Budget: $15 - $25 CAD, Jobs: AWS Lambda, JavaScript, MongoDB, Next.js, Node.js, OpenAI, PostgreSQL, React.js, REST API, SaaS Development)