Role
SellScale is building the first Agentic Revenue Org, starting with Selix - an agent for outbound sales.
We are looking for our nextFounding Full Stack Software Engineer . This position will be shipping across the stack - backend, frontend, and database. You will quickly get involved with shipping AI/agentic features.
This position is targeting a minimum 1% equity minimum grant.
Requirements
AI interest - including with agentic apps. Production AI experience not required. But, this should not be your first time making an agentic app or calling LLM APIs. Hackathons and extensive side projects are OKAY .
1 year of work experience - unfortunately, no new grads .
In person - able to work 5 days a week in San Francisco
Solid CS fundamentals - an undergrad degree in CS, and able to ship across the stack:
Front-end: React/Typescript
Back-end: Python (e.g., Flask, FastAPI, or Django)
Database: SQL experience (e.g., Postgres)
Early stage only - interest to join a startup as one of the first N employees
AI-free coding - no vibe coding here! To pass the interview, you’ll be expected to ship with minimal AI use.
Reasons to think twice about applying…
You are looking for “senior leadership” guidance - be ready to solve your own problems!
You don't enjoy in-office culture - we work 5 days a week in-person
You’re looking for larger companies - this is an early, tight, technical team!
Positives
You will make decisions that will take you 10 years at Google to do
There are few other places where you will learn more about building in an agentic / AI than here
You will have a driver’s seat in an Agentic AI startup in the heart of SF, with a mult $bn TAM - enterprise sales spend
Skills
Fearlessly works across the entire stack (backend / frontend / design / infra / tooling )
Strong Python, JavaScript, React, React Native, Flask, PSQL, and LLM-prompting skills.
Great prompting and knowledge of agentic systems (including building your own from scratch)
Strong communication skills for our non-technical userbase, and very technical team
Strong English as sales, prompting, and LLMs, all deal with language and what to say
Application process
A well-rounded application to test across the stack and against team culture.
Intro call - get to know Selix & the SellScale team.
Take home - Build a full stack agentic app
Technical — Pair-program on your deliverable
Product & pace — Walk through the non-tech side of SellScale - filled with prototyping, WOZing, prompting, and more.
The stack
Front-end: React/Typescript
Back-end: Python (Flask)
Database: PostgresSQL
About SellScale
SellScale is building the first agentic revenue org.
Background: At a business, you’re either building the product or selling it. Enterprise sales spend is a multi-$bn market.
Problem: As businesses grow larger, their sales spend grows disproportionately . Why? Sales—especially outbound—is still human-driven: it’s subjective, hard to measure, and doesn’t scale like code. This is exactly the kind of problem agents are built to solve.
Opportunity: With the advent of recent tech like like agentic AI, large language models, vector databases, and more - future sales is human x machine . Our agent, Selix , has already seen a lot of success.
Timing: Right now, we are in the dot-com boom of AI Agents. The agents we' build help solve a businesses’s #1 problem: how to grow revenue. We use Chained LLM thinking and start of the art GTM tools to help companies grow.
Want to learn more? Check out our resources below:
Reference 1:NewtonX Case Study
Reference 2:I’m AI BDR, and I’m Selix(I’m a Mac, I’m a PC Parody )
Reference 3:SellScale values
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