AI & Machine LearningDirect Ashby career site

Data Demons

Location: San Francisco, CA · On-site
Job type: Full-time
Level: Mid-level
Listed: 23 days ago

Skills & highlights for this role

Python
TypeScript
Next.js
Kubernetes

Also useful

Tailwind CSS
LLM implementation
model evaluation

Stated benefits & perks

Health
401k

About the Role

We're looking for scrappy engineers who ship data-tooling interfaces fast. You will progress model intelligence through the interfaces, datasets, and evaluation tooling you build, combining product sense, data science, and engineering. You'll be part of the real "secret sauce" of TypeSafe: figuring out how our models can provide production-ready reliability in the real world.

Our tech stack is primarily Python. We also use TypeScript, Next.js, and Tailwind CSS for frontend, with Kubernetes for orchestration. We empower developers to use any tooling they find helpful for getting their job done, including AI and agents.

What You'll Do

Create high-leverage datasets, products, and user interfaces that unlock new capabilities and use cases on top of our model
Build internal data-tooling and evaluation interfaces - fast - that make model development clearer (evaluation, debugging, data inspection)
Develop and own evaluation frameworks to measure quality, reliability, and emergent characteristics across model iterations
Run rigorous analyses and experiments to understand how data, training choices, and targeted interventions impact model behavior
Turn raw model outputs and data into clear, inspectable UIs - owning a domain end-to-end, with craft and judgment over simple optimization
Partner closely with product managers and customers to translate real-world needs into concrete model and system improvements
Continuously iterate, learn, and co-discover new techniques for building exceptional, trustworthy AI products

We Are Looking for People Who

Are generalists with solid fundamentals, strong coding ability, and product intuition
Maintain high attention to detail and a strong bar for quality
Enjoy thinking beyond the code to how systems are used in the real world
Are scrappy and hacky, and thrive in ambiguous problem spaces - taking satisfaction in finding creative solutions
Don't trust LLMs blindly - they look at the reality of model generations
Have hands-on experience implementing LLMs and understand their capabilities and limitations

We Provide

100% covered health insurance
Daily lunch and dinner
Visa sponsorships
401K plans

About Typesafe

We’re building prod, not god. TypeSafe is an AI lab pushing frontier model intelligence in a new direction, starting with System One Models. We combine the reasoning of LLMs with the reliability of code, for truly trustworthy AI. Our first model, Jev, launched in September 2026.

While others chase leaderboards, we’re rebuilding the LLM stack from first principles to make models smarter and also dependable enough to run in production. We’re a small, fast team backed by an $870M Series A led by a16z. Made in SF, with love. Come join the frontier.

Life at Typesafe

We’re a small, flat, close-knit team working to make intelligence dependable enough to become part of everyday software. We work fully in person from our San Francisco office near Embarcadero station. We love what we do and care deeply about the work.

We strive for excellence and craftsmanship and won’t stop until we get there. When the team wins, we all win, and we enjoy collaborating and inspiring each other to grow-as a team and as individuals.

We value emotional honesty, kindness, and bringing your whole self to work. We build machines; we don’t try to be machines.

We want TypeSafe to be the place where you do the most impactful work of your career and help define our future as a company.

Read the original posting

From TypeSafe AI's careers page, first listed on Rolev.ai on October 17, 2026. Rolev.ai is not the employer.

How Rolev.ai helps with this application

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Common questions

Where is the Data Demons job at TypeSafe AI located?

This Data Demons position at TypeSafe AI is located in San Francisco, CA (On-site). Always check TypeSafe AI's application page for specific state eligibility or relocation policies.

What qualifications are required for Data Demons at TypeSafe AI?

For the Data Demons role, TypeSafe AI highlights experience with Python, TypeScript, Next.js, Kubernetes. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.

How do I apply for the Data Demons position at TypeSafe AI?

This listing links directly to TypeSafe AI's Ashby application page. You can apply directly on TypeSafe AI's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.

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