Founding AI Full-Stack Engineer

Neptune; New York (NY); On-site; USD 150,000 - 225,000; Full time

Benefits offered by this job

Base salary $150K–$225K

Founding equity 0.25%–0.75%

Ownership with CTO as engineering lead

Job summary

Neptune is seeking a founding Full-Stack Engineer to help build a shared operating system for couples, combining AI with vetted financial and legal workflows. You’ll be employee #1 on engineering and work directly with our CTO to shape product direction.

You will own features end-to-end, ship weekly to users, and contribute to a product that aims to earn deep trust from couples managing life decisions and wealth together.

Qualifications

• 3–6 years of full-stack experience.
• Track record of shipping features into production.
• Experience with AI/LLM-powered workflows is a plus.

Responsibilities

• Own features end-to-end (architecture, frontend, backend, deployment).
• Build the conversational AI and LLM-powered workflows at the heart of Neptune.
• Create the shared memory/context engine that remembers each couple's financial and legal life.

Skills

Full-stack engineer experience

Shipping features to production

AI integration

User-focused design

Tools

React

TypeScript

TanStack

Go

Job description

Neptune is seeking a founding Full-Stack Engineer to help build a shared operating system for couples, combining AI with vetted financial and legal workflows. You’ll be employee #1 on engineering and work directly with our CTO to shape product direction.

You will own features end-to-end, ship weekly to users, and contribute to a product that aims to earn deep trust from couples managing life decisions and wealth together.