Founding Software Engineer at fast-growing AI startup

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jack's network

The next step is to speak to Jack.

Founding Software Engineer

Company Description: Fast-growing AI sales automation startup

Job Description:
You will lead the design and development of scalable software systems, focusing on AI agents and backend architecture. As a founding engineer, you'll work with co-founders to define the roadmap, architect long-running job infrastructures, and train custom LLM models. This is a high-impact role driving the core technology for B2B prospecting automation.

Location: San Francisco, USA

Why this role is remarkable:

• Shape the foundational architecture and engineering culture of a well-funded AI startup from day one

• Deep technical ownership over cutting-edge LLM implementation, including fine-tuning and production-level inference layers

• Direct impact on product-market fit through close collaboration with co-founders and early customer onboarding

What you will do:

• Design and maintain scalable backend systems and long-running job frameworks using Temporal or Airflow

• Develop and deploy AI agents leveraging prompt engineering, RAG, and vector databases to automate workflows

• Collaborate with the GTM team and co-founders to architect the system and scale the engineering organization

The ideal candidate:

• Expert in Python and TypeScript with a strong foundation in system design and production deployments

• Proven experience with long-running job infrastructure and production-level AI systems including fine-tuning models

• Thrives in high-pressure startup environments and takes extreme ownership of complex, ambiguous technical challenges

Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.