AI / ML Engineer

known· Engineering
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📍 San Francisco, CAFullTime💰 USD 200K–375K/yr

About this role

Known - Founding Machine Learning Engineer

  • San Francisco, CA (In-Person)

  • 200k-375k Cash + Equity

Known is a matchmaker that talks to users and supports them like a friend. Our mission is to empower humanity by applying general intelligence to human connection.

Users join Known by telling us their life story. On average, our new users talk to our AI voice agent for 27 minutes, giving us a uniquely intimate multi-modal data set.

We are a team of engineers who’ve created some of the most widely used AI-driven consumer products including Uber Eats, Uber, Faire and Afterpay.

We love to work hard, with a high degree of autonomy and ownership. We work together in Cow Hollow, San Francisco.

Learn more

About the Role

We’re looking for founding machine learning engineers to continue to design and build Known’s core systems intelligence, driving our recommendation engine and agentic systems.

This is a unique opportunity to work with an ultra-personal data-set, combining voice transcripts, images, and structured user data to create both personalized AI companions as well as predict human compatibility. You’ll work directly with Chen Peng, former head of ML at Uber Eats and Faire.

What you’ll do

It’s up to you to decide what part of the ML stack you’re most excited about working on.

This could be:

  • Training and deploying ML models that form the core of our recommendation engine

  • Designing evals to assess recommendation ability and RL systems to learn from results data

  • Building personalization and long-term memory systems into Known’s conversational AI

  • Using LLMs to enhance our suite of user facing AI Agents

You will own the end-to-end lifecycle of your models, from ideation and training to deployment and monitoring.

Requirements

  • 4-6 years experience training and deploying ML models in production, leveraging PyTorch and TensorFlow

  • Applying or fine-tuning LLMs to build agentic systems or complex conversational AI

  • Experience with neural network models

  • Experience with model deployment and basic infrastructure (e.g., Docker, Kubernetes, AWS/GCP)

  • You want to build intelligence that could lead to a million marriages and babies

Our Investors

We’re backed by Eurie Kim and Kirsten Green at Forerunner Ventures (the investors behind Decagon, Faire, and Oura), NFX and PearVC.

Frequently Asked Questions

What is the salary for the AI / ML Engineer role at known?
The listed salary for this AI / ML Engineer position at known is USD 200K–375K/yr. This is an FullTime role.
Where is the AI / ML Engineer position at known located?
This AI / ML Engineer role at known is based in San Francisco, CA. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the AI / ML Engineer role at known full-time or part-time?
This is listed as a FullTime position. It is posted as a AI / ML Engineer role in the Engineering department at known.
Which team or department does the AI / ML Engineer at known belong to?
This AI / ML Engineer position is part of the Engineering department at known. See the full job description for more information about the team structure and responsibilities.
How do I apply for the AI / ML Engineer position at known?
Click the "Apply Now" button on this page. You will be redirected to known's official application portal hosted on ashby where you can submit your application directly.
When was the AI / ML Engineer job at known posted?
This AI / ML Engineer position at known was posted on Apr 24, 2026. Apply as soon as possible — early applications are often reviewed first.
AI / ML Engineer
known · 💰 USD 200K–375K/yr
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