Software Engineer, Product

Braintrust
San Francisco, CA

About the company

Braintrust is the end-to-end developer platform for building world-class AI products. AI development is a relatively new paradigm combining code and datasets, incrementally refining both using frequent evaluations. Our product lets you evaluate LLM applications and iteratively improve them, with a rich set of tools to visualize changes and interrogate failures.

Developers integrate Braintrust into their continuous integration and development loops, often running 50+ experiments per day .

Our team includes AI, design, and database veterans who have exited multiple companies and worked at Figma, Nuro, Impira, Singlestore, Google, Amazon, Cruise, and Airtable. We're backed by a16z, Greylock, Elad Gil, Basecase, and leading CEOs/founders.

About the role

We're looking for a product engineer who is passionate about building tools that users love and use every day. You'll work on the core product, hang out with users (developers, product managers, and designers working in AI), and play a key role in shaping the roadmap.

Under the hood, Braintrust is a high performance, local-first, visualization-heavy UI built with modern Typescript and React. Our users work at some of the world's best technology companies and expect our product to be lightning fast, reliable, and intuitive.

What you'll do

  • Build the user-facing pieces of Braintrust. Some examples of what our product engineers have worked on:

    • Charting and data visualization in d3

    • Adding support to visualize outputs from multi-modal LLMs

    • Creating an experience to support human reviewers in the product

  • Create a dialog with end-users to directly solve customer problems and gather feedback about the product

  • Play a significant role in the foundational UI architecture, technology choices, and implementation.

Ideal candidate credentials

  • Expert-level understanding of Typescript, React, HTML, CSS, SQL, NextJS

  • Previous experience founding or working at startups is a plus

  • Has written prompts / tinkered with GPT models and apps

Benefits include

  • Medical, dental, and vision insurance

  • Daily lunch, snacks, and beverages

  • Flexible time off

  • Competitive salary and equity

  • AI Stipend

Equal opportunity

Braintrust is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.

Posted 2025-09-13

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