Software Engineer, SDK
The Software Engineer, SDK at Confidential Client is responsible for designing, implementing, and maintaining open-source SDK libraries that enable AI observability and evaluation across diverse environments. This role emphasizes delivering high-quality, idiomatic, and performant SDKs while collaborating with cross-functional teams and engaging with the developer community to enhance AI adoption and operationalization.
About Careertakes
👉 Important disclosure: Careertakes is a third-party recruiting platform supporting this hiring process. If selected, you will be employed directly by our client, Software Development.
Applicants for this role may also receive access to additional matched opportunities through the Careertakes platform.
About the Role
Confidential Client is hiring a Software Engineer, SDK to build and maintain the open-source SDKs that power LLM evaluation and AI observability pipelines. These libraries are embedded in customer applications and support integrations with major AI providers and frameworks. You’ll own the full SDK lifecycle — design, implementation, release, documentation, and community support — focusing on developer experience, reliability, and performance.
What You’ll Do
- Build elegant, idiomatic, and resilient SDKs that power LLM evaluation and AI observability.
- Prioritize developer experience: clean APIs, clear docs, thoughtful error handling, and backward compatibility.
- Integrate SDKs with major AI providers and frameworks (e.g., OpenAI, Anthropic, Gemini) and commonly used runtimes.
- Create tools and automation for testing, profiling, and streamlined release workflows.
- Collaborate with backend, platform, and product teams to deliver a cohesive developer experience.
- Engage with the community: triage issues, review and accept contributions, and help users adopt the SDKs.
You Might Be a Fit If You:
- Are customer-obsessed and focused on solving real problems for developers.
- Have deep expertise in one or more of: JavaScript/TypeScript, Python, or Go, and understand what it takes to build idiomatic, production-grade libraries.
- Are proficient with SDK/tooling ecosystems: testing frameworks, profilers, CI/CD pipelines, and packaging systems.
- Care deeply about API design, documentation, and developer ergonomics.
- Know how to extend or wrap existing frameworks/SDKs to inject observability without breaking developer workflows.
- Have contributed to or maintained production-grade open-source libraries used across multiple environments.
Nice to Have
- Contributions to popular open-source projects or experience leading SDK adoption at an organization.
- Familiarity with tracing and observability tooling (e.g., OpenTelemetry).
- Experience working on tools in the LLM / AI ecosystem or building evaluation pipelines.
Benefits
- Medical, dental, and vision insurance
- Daily lunch, snacks, and beverages
- Flexible time off
- Competitive salary and equity
- Wifi & cellphone stipend
Location & Employment Type
- Location: Seattle, WA (this posting uses Seattle, WA as the authoritative location)
- Employment type: Full-time
- Reasonable accommodations are available upon request to support the application and interview process.
Equal Opportunity & Hiring Transparency
Careertakes and our client are Equal Opportunity Employers committed to building a diverse and inclusive workforce. We prohibit discrimination or harassment of any kind. To support a fair and efficient hiring process, AI tools may be used to assist with application review or resume screening. These tools do not replace human decision-making. Final hiring decisions are made by people.
If you have questions about how your data is used, please contact us directly.
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