Founding Fullstack Engineer at Cortex AI

Gurugram (Remote OK) · Full-time · Early-stage equity + 20-30k INR/month

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What is Cortex?

Every AI agent today is brilliant but blank. It knows nothing about the person it's supposed to represent.

Cortex is the infrastructure layer that fixes that. You upload your writing, voice recordings, documents - and Cortex builds your exact clone. Your clone is then accessible via REST, MCP, and voice APIs so any AI agent can think, answer, and speak as you - with actual fidelity, not generic LLM output.

We're building human intelligence infrastructure for the agentic internet. The first product is a personal digital twin. The platform is what every AI agent will eventually need to pull from.

We're early, moving fast, and raising.

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The role

You'll be the second technical person. Ownership is real - you're not filling tickets, you're helping decide what gets built and shipping it yourself.

The stack is Next.js App Router, Supabase (Postgres + Storage), Claude and OpenAI APIs, ElevenLabs voice. The hard parts are built. What's ahead is depth, speed, and scale.

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What you'll do

- Build and ship product features end-to-end - frontend, API routes, database, the whole thing

- Extend the ingestion pipeline (text, voice, file, social data)

- Work on retrieval quality, clone fidelity, and the intelligence layer

- Keep the architecture clean as the product evolves fast

- Be the person who figures things out when there's no playbook

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What we're looking for

- 1–3 years building full-stack web products (React + Node/backend of any kind)

- You've shipped real things to real users

- You can read an unfamiliar codebase and orient fast

- You care about product quality, not just code quality

- You're comfortable with ambiguity — "figure it out" energizes you, it doesn't stress you

- Bonus: you've worked with LLM APIs, vector search, or real-time data pipelines

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What you won't find here

- Sprint planning ceremonies

- PRs that sit for a week

- A codebase only seniors are allowed to touch

- Work that doesn't matter

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Compensation

₹20,000 - 30,000/month + meaningful early equity (vesting over 2 years, 6-month cliff)

This is a founder-level bet on the company. If Cortex becomes what we're building it to be, the equity is the real number.

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Apply

Send a short note on what you've shipped and why this into resume templates. No cover letter boilerplate. Just tell us what you've built.

Pay: ₹20,000.00 - ₹30,000.00 per month

Benefits:

• Flexible schedule
• Food provided

Application Question(s):

• What have you built before? You can be specific and give as many pointers as needed.

Work Location: In person