Senior Full-Stack Engineer (Next.js / E2B / Vercel Platforms)

We're hiring a senior full-stack engineer to help us launch MythOS Pro, an AI-powered operating system for local service businesses (barbershops, salons, restaurants). It's a full platform: CRM, booking/calendar, payments, inventory, a workforce module, an AI agent (Mylo) that runs across all of it, and a website builder. You'll work directly with the founder and grow into a core engineering role as we get launch-ready. Strong English communication required.
Priority #1 — Website Builder (the immediate need):
Our builder lets a customer import their GitHub repo, edit their Next.js site inside our platform, then push to main, which triggers an automatic Vercel redeploy so their live site updates. We need this pipeline rock-solid:

Fix reliability issues with our E2B sandbox (sandboxes sometimes fail to load / dev server doesn't bind correctly on port 3000). Reference: e2b-dev/fragments.
Build a clean GitHub repo import flow: clone repo into the sandbox (sandbox.git.clone), npm install, boot the Next.js dev server, expose the preview URL into our editor iframe.
Implement edit ? commit ? push-to-main back to the customer's GitHub repo via the GitHub App (installation token).
Wire the push to trigger Vercel auto-redeploy, with each customer's site served on their own subdomain via Vercel for Platforms (multi-tenant). Help us finish setting this up.
Sandbox lifecycle management: create, auto-pause on idle, resume on edit, kill on session end, with cost controls.

Beyond the builder, there's a deep backlog across the whole platform — CRM, booking, payments integrations, inventory, the workforce module, and Mylo's agent capabilities. We want someone who can own significant pieces of the product and help drive us to launch.
Our stack:

Frontend/API surface (mythOS-pro): Next.js App Router, TypeScript, Supabase, Tailwind, deployed on Vercel.
Agent runtime (mythos-claw): a custom Rust runtime that powers our Mylo agent — built on a fork of NEAR AI's IronClaw, blended with OpenClaw, Hermes, GoClaw, and other components. Runs as a long-running service on Google Cloud Run (Postgres/Neon, Redis/Upstash, embedded Hermes worker, Gemini integration).
Other: GitHub App integration, E2B sandboxes, Vercel for Platforms (multi-tenant), Claude API, Pinecone vector search.

The two runtimes communicate over HTTP — mythOS-pro is the public-facing surface, mythos-claw is the brain.
Must have: Deep Next.js App Router + TypeScript experience and the ability to debug deployment/infra issues independently (Cloud Run, Vercel, sandboxed dev environments). Strong bonus / what sets you apart: Rust experience and comfort working in an agent runtime — we'd love someone who can contribute to mythos-claw itself, not just the Next.js surface.