Full-Stack Developer — Take a Built AI SaaS to Production (Contract → Ongoing)

The short version I'm a solo founder. I've built MINE — a multi-tenant SaaS platform that gives small businesses a suite of AI "employees" (sales, support, social, bookkeeping, growth, and more) plus a website builder, sold direct and white-labelled to agencies. The product is feature-complete and wired end-to-end; the backend is ~2,000 endpoints across 105 route files, the dashboards are built, and roles are separated and enforced. I need a developer to take it the last mile: production hardening, integration wiring, real-world testing, and launch — then stay on for ongoing work. This is not a greenfield build. It's getting a large, real, nearly-finished system safely into production. What MINE is AI employee suite — 17 AI "employees" that automate real work for SMBs, each making live Claude API calls, with a human-approval guardrail (manual / semi-auto modes). Website builder — AI-generated sites with hosting, domains, and editing. Two sales motions — direct subscriptions, and a white-label "agency" tier where agencies manage multiple clients under their own brand. AUD-priced, Stripe-billed, with metered overage and per-employee add-ons. The stack Backend: Node.js + Express, ~100k LOC, ~2,000+ endpoints, JWT auth, multi-tenant (every query scoped by tenant). SQLite in dev, Postgres in production. Frontend: single-file HTML dashboards (vanilla JS, no framework, no build step) — one consolidated file serves user / admin / agency by role. (A React app was archived; HTML is the live product.) Integrations: Stripe (subscriptions + Connect + metered billing), SendGrid, Twilio, AWS S3, EasyPost, Shopify, Cloudflare, Coinbase Commerce, and AI/video providers (Anthropic, Runway, HeyGen, Replicate, and others). Mobile: Capacitor shells (iOS) with Stripe Terminal Tap-to-Pay scaffolded. Node v22. Lockfile committed. Extensive internal docs (full API reference, provider map, feature-to-API mapping). What you'd actually do Stand up production — deploy the backend, provision managed Postgres, wire Stripe/SendGrid/Twilio webhooks, configure env + secrets. Run the per-role smoke test — log in as each role, exercise every panel against the live backend, fix what doesn't render or load. Validate the high-risk paths — payments, auto-sending AI agents, the agency client-impersonation flow — end-to-end, with guardrails, before going wide. Connect the credential-gated integrations — several endpoints are correctly waiting on API keys / OAuth (Google Business, LinkedIn, domains, etc.); bring them online. Harden — a money→integer-cents migration is scoped, AI grounding (RAG/eval) is a known improvement, and there's a backlog of polish. Then: ongoing feature work across MINE and adjacent products. I'll give you a detailed handoff doc, the full codebase, and direct access to me. I work fast and I'm decisive; I value honest pushback over agreement. You're a strong fit if you have Solid Node.js + Express and Postgres experience, and you're comfortable navigating and extending a large existing codebase (not just building from scratch). Real Stripe integration experience — subscriptions, webhooks, Connect, ideally metered billing. Confidence with vanilla JS / DOM (the UI is framework-free single-file HTML — you must be okay working without React). A track record of shipping to production: deployment, env/secrets, webhooks, debugging live systems. Good judgment on security and multi-tenancy (auth, tenant isolation, not leaking data across accounts). Bonus points LLM / AI API integration (Anthropic, RAG, eval harnesses). Multi-tenant SaaS or white-label/agency products. Capacitor / mobile, or DevOps (Railway/AWS/Cloudflare). Comfort with an honest, no-BS working style and a founder who ships. Logistics Engagement: contract to start (production push), with strong potential to continue ongoing. [rate / hours / start date — to discuss] Location: remote; I'm in Brisbane, Australia — reasonable timezone overlap appreciated. First milestone: a clean per-role smoke test passing against a live backend, with the high-risk flows verified. To apply Tell me briefly: (1) a large existing codebase you took to or kept in production, (2) your Stripe + Postgres experience, (3) whether working without a frontend framework is fine with you, and (4) your availability. Links to relevant work welcome.