Looking for a SENIOR Shopify app developer

We're a very sophisticated public Shopify app with multiple functionalities around A/B testing. We're looking for a senior Shopify app developer, with extensive experience of working on a Shopify app. Looking for anything between 20-40 hrs per week, and it could last from as little as 1 month, to as long as 6 months, or potentially long-term full time. Tech stack: TypeScript with Remix Frontend: React with Polaris and Tailwind Backend: Node.js