Senior Full-Stack Engineer (Next.js + AI/LLM APIs) — Build a SaaS Platform from Scratch

About the Role

We're building a SaaS platform that helps businesses track and improve how they appear across AI search engines (ChatGPT, Claude, Gemini, Perplexity, Copilot). Think "SEO for the AI era." The landing page and product direction are done. We need a strong builder to ship the actual software.


What You'll Build

AI Visibility Tracking dashboard (multi-LLM API integration)
Hallucination Detection system
Google Analytics integration
Competitor Intelligence module
One-Click Fix Generator (FAQs, schema markup, LLMs.txt)
Weekly automated email reports
Auth, Stripe billing, and admin panel


Required Skills

3+ years full-stack development
Next.js (App Router), React, TypeScript
Node.js backend
LLM API integration (OpenAI, Anthropic, Gemini, Perplexity)
PostgreSQL or Supabase
Stripe subscription billing
Tailwind CSS, shadcn/ui
Vercel deployment
Strong English communication


Nice to Have

Shipped SaaS products from zero to launch
SEO, schema markup, structured data
Google Analytics API
Background job systems (Inngest, BullMQ)
AI SDKs (Vercel AI SDK, LangChain)

Who We're Looking For

A fast, self-directed builder who ships clean code without hand-holding. Long-term mindset, high standards, and excited to grow into a Lead Engineer role as we scale.