Senior Full Stack Developer (TypeScript / Next.js / Supabase)

About the Role

We're building a consumer web product that helps salaried employees assess whether their employer's benefits package health, dental, vision, life, AD&D, disability, tax-advantaged accounts, and retirement — actually protects their household. Users upload plan documents, an LLM extracts the terms, and we score the gaps and produce an actionable report.

senior full-stack engineer who has shipped a product end-to-end largely on their own

What You'll Build

• A multi-step assessment wizard capturing household, income, and benefits data
• A document upload pipeline: PDF object storage async LLM extraction with structured JSON output human review and confirmation UI
• A rules-driven scoring engine producing a weighted 0–100 adequacy score across six benefit domains
• A prioritised recommendation engine with dollar-denominated gap figures
• A PDF report generator
• Admin tooling for updating annual IRS-style limits and thresholds without a deploy

Must Have

• 5+ years professional software engineering
• Production

  TypeScript

  and

  React

  — not tutorial-level

• Next.js

  (App Router) in production

• PostgreSQL schema design

  — tables, indexes, migrations. Not just ORM calls.

• Supabase

  or Firebase experience
• Hands-on

  LLM API integration

  (OpenAI, Anthropic, or similar) with

  structured/JSON output

  and malformed-response handling
• Serverless / edge function experience
• Shipped at least one product

  end-to-end, solo or as one of two engineers

• Comfortable working directly with a non-technical founder on ambiguous requirements
• Public

  GitHub

  with original, non-forked repositories

Good to Have

• Background job queues and async pipelines
• PDF generation or headless browser tooling
• Rules engine / decision engine experience
• Fintech, insurtech, or healthtech exposure
• Prior freelance or contract experience with overseas clients

Not a Fit If

• You are primarily a data scientist, ML engineer, or DevOps specialist
• Your stack is Java, .NET, PHP, or WordPress only
• You are mobile-only (React Native / Flutter / native) with no web shipping
• Your GitHub is all forks, bootcamp projects, or empty

Tech Stack

TypeScript • Next.js • React • Supabase (Postgres, Auth, Storage) • Vercel • Tailwind CSS • shadcn/ui • Inngest/Trigger.dev • Resend • Stripe • PostHog • one LLM API with structured output • React-PDF