Software Engineer, Web Platform

About Nunchux AI

Nunchux AI builds infrastructure that makes multimodal generative AI faster and cheaper to serve, and easier to build on. Founded by MIT PhDs Muyang Li, Yujun Lin, Zhekai Zhang, and CMU Professor Jun-Yan Zhu, Nunchux brings together deep research expertise and production systems experience. Built on nearly a decade of research from MIT and CMU, our work includes nunchaku, whose models have surpassed 4 million downloads. We’re backed by top VCs and building for enterprises and millions of developers.

The Role

Nunchux is building a growing set of web and developer surfaces: Modelverse, Playground, the dashboard, CMS, billing, authentication, APIs, and documentation. As a Software Engineer, Web Platform, you will build the CMS and automated systems that keep those surfaces reliable as we ship.

This is a software engineering role, not a manual QA role. You will write code, investigate failures, and work directly with product engineers to improve coverage and release quality.

What You’ll Do

• Build our CMS: Design and build the CMS workflows we need to publish and update model pages, examples, blog posts, documentation, and other website content without a code deploy for every change.
• Build automated tests: Write and maintain end-to-end, regression, and API tests for critical product flows, including sign-up, authentication, billing, API keys, CMS workflows, documentation, and Playground runs.
• Validate the developer experience: Test API endpoints, SDKs, documentation, and code examples so developers can get from their first API call to a working integration.
• Improve release quality: Add reliable test coverage to CI/CD and preview deployments. Run release checks, investigate failures, and work with the owning engineer to resolve them.
• Monitor product health: Set up and maintain lightweight error tracking and synthetic checks so issues are found before customers report them.

What You Bring

• Software engineering experience: 3+ years building and shipping production web products, including meaningful experience with automated testing, SDET work, or test infrastructure.
• Strong coding skills: Comfortable in TypeScript/JavaScript and Python. Able to build web product features and test infrastructure, debug product behavior, validate APIs, and build small tools or repro cases.
• Test automation: Hands-on experience with Playwright, Cypress, or similar end-to-end testing frameworks, as well as CI/CD workflows.
• Debugging and systems thinking: Comfortable using logs, error tracking, and synthetic checks to find, communicate, and resolve issues across user-facing products.
• Working style: Able to work independently in a fast-moving environment and close gaps without waiting for a large process around you.

Bonus Points

• Experience with Vercel deployments, preview environments, or production validation.
• Experience with GitHub Actions or similar CI/CD tooling.
• Experience with Sentry, Checkly, Datadog, Grafana, or similar monitoring tools.
• Experience testing developer tools, APIs, billing, authentication, CMS workflows, or dashboards.
• Familiarity with OpenAPI, Postman, Bruno, Mintlify, or similar API tooling.

Why Join

• Build the foundation: Help establish how Nunchux manages website content, tests its product, and ships reliably.
• Broad product scope: Work across Modelverse, Playground, the dashboard, CMS, APIs, and documentation.
• Proven technology: Build on open-source work with more than 4 million model downloads and growing industry partnerships.
• The team: Work alongside MIT, Berkeley, and CMU researchers and veterans from NVIDIA, AMD, Snowflake, and Adobe.
• Compensation: $160,000 to $230,000 USD base salary, plus meaningful equity and comprehensive benefits, including health insurance and 401K. Actual compensation will depend on relevant experience, skills, and qualifications.

Location: San Francisco, CA. 4 days in office, 1 day remote.

Start date: As soon as available

Visa: We sponsor H-1B and other work visas for exceptional candidates.

Learn more: nunchux.ai

Apply: Please apply through our Ashby careers page.

Nunchux AI is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Compensation Range: $160K - $230K