About Stainless

Stainless is a fast-growing tech startup building the future of APIs. Our customers include industry leaders like OpenAI, Anthropic, and Cloudflare.

We have raised over $35 million from a16z, Sequoia, and founders/C-levels from Stripe, Datadog, Segment, Linear, and more.

We are headquartered in NYC, just west of SoHo, and expect to grow from ~20 to ~40 people in 2025.

Position overview

Partner Engineers build and deepen the technical relationship between Stainless and our most important users. You’ll work directly with some of the most innovative technology companies like OpenAI, Anthropic and Cloudflare. You’ll be the voice of the customer to the rest of the company, advocating for them and directly influencing the roadmap of the company both immediately and longer term.

To excel in this role you will have strong independent judgement and can write software in a wide variety of programming languages (maybe from prior experience or picked up on the job). You learn quickly and can jump into unfamiliar contexts (and repositories) with ease. You’ll be directly contributing to some of the most used and visible codebases today and collaborating with our most important users.

Responsibilities

Overall you’ll:

• Work directly with critical customers like OpenAI, Anthropic and Cloudflare to:

  • Evolve their SDKs through the release of new features (Run Tools, Structured Output, Streaming Helpers)

  • Directly contribute to their SDKs by writing custom helpers, utilities and extensions for advanced use cases like Server Sent Events, websockets and more to come. You’ll work closely with companies like OpenAI and Anthropic as a critical partner in the lead-up to all their major API launches.

  • Do all of this across all languages that Stainless supports, learning new languages where needed.

• Build AI-powered tooling to:

  • configure new users’ SDKs when signing up for Stainless

  • translate custom tailored solutions from one language to many

  • write rich, purpose-built examples and demos for prospective customers

• Write great docs, help build a great website, do what needs done

• Write code both internally and for external customers. Some examples:

  • improving our SDK Codegen to handle new use-cases

  • writing examples and demos for new feature releases

• Location:

  • Either:

    • onsite in our physical office in Hudson Square, Manhattan, New York (flexible WFH)

    • PST Remote

Profile

You might be a good fit for this role if:

• You were a founder or founding engineer of an AI-driven company and worked really closely with your customers to help understand their needs and solve them

• You have broad polyglot interest/experience – comfort working across multiple programming languages, and enthusiasm to build proficiency with even more

• You have experience using AI to generate high-quality code.

• You have a true passion for developer experience and empathy for developers from all backgrounds (junior, non-traditional, expert power-user etc)

• You love connecting with all users: learning their needs and coming up with creative solutions to solve them

• You care deeply about great communication about technical subjects, from terseness of a tweet to an expanded tutorial in documentation

• You’re a quick learner, self-motivated, and able to execute quickly whilst maintaining high quality

• You love crafting a great product. You appreciate and show extreme detail-orientation in articulating papercuts and finding every possible corner of polish

• Experience building and consuming APIs

• Built and/or maintained a popular open-source project

Benefits

• We offer competitive salary and generous equity grants.

• Great healthcare coverage options (e.g., fully covered platinum plans).

• Paid commuter benefits & similar.

• Paid team lunch/meals during workdays.

• Flexible PTO plus 3 weeks of company-wide vacation a year (2 weeks in December, 1 week at the end of the summer).

• Flexible WFH and 1 month fully remote per year ("remote February").