Looking for a Senior Full-Stack Developer [React/Next.js/TypeScript] for AI-Driven Document SaaS

We are looking for an autonomous, senior-level Full-Stack Engineer to help build/optimize a production-ready web application that handles dynamic PDF processing. This is an initial contract for a specific feature milestone, but we are looking for a long-term technical collaborator if the fit is right. We value clean code architectures (modular, vertical slices), type safety, and efficient API orchestration. Technical Stack Your expertise must align tightly with our core environment: - Frontend: React, Next.js (App Router), Tailwind CSS (using motion/react for fluid animations and shadcn/ui components). - Language & Validation: TypeScript, strict Zod schema validation. - Backend & DB: Node.js, Next.js Server Actions, type-safe ORMs (Prisma / Drizzle). - Environment: Native Linux deployment pipelines. Scope of Work & Initial Milestone For this initial contract, you will be responsible for: - Setting up a modular, feature-isolated slice for [Specific Task, e.g., processing document uploads and tracking API token usage]. - Creating an interactive user dashboard layout that updates dynamically based on system states. - Implementing rigorous error handling using Zod schema structures for multi-step form wizard states. What We Are Looking For Deep Architectural Ownership: You don't just write code; you design clean, scalable systems. You understand how to separate high-level orchestration from execution logic. AI Tooling Savvy: Familiarity with leveraging local or gateway AI workflows (e.g., OpenRouter) to build intelligent features is highly valued. Communication: Direct, clear, and proactive updates. We work inside Github/GitLab and communicate strictly through task milestones. Please briefly detail: A recent project/(s) where you implemented a modular vertical slice architecture using Next.js and TypeScript.