Senior Software Engineer - API Platform & Client Tooling

What You'll Do:

The Cloud Platform API team builds the API platform and the tooling that every other engineering team at CoreWeave uses to ship and consume APIs. This role sits with the group that owns CoreWeave's Go framework for building API services (server code and tooling), and the client surface it generates: SDKs, the CWIC command-line tool, and the Terraform provider. The team's charter is "one proto definition should produce every client surface, generated and released the day the API ships." Today that tooling is written by hand, one service at a time, and it lags the API; this role helps make generation the default path.

About the role:

As a Senior Engineer on API Platform & Client Tooling, you'll design and build the code-generation pipeline that turns a single proto contract into Go SDKs, CWIC commands, and Terraform resources. You'll own components end to end, from the proto and API contract through the generated artifacts other teams depend on, and raise the quality bar for the developer experience across that whole surface. Because this team is CoreWeave's internal API consultancy, you'll also partner with other teams early in their design process to help them ship good, consistent APIs. Expect a mix of hands-on Go engineering, API design, and cross-team collaboration.

In this role, you will:

• Own components of our API services framework (server code and tooling) and its generated artifacts: proto-driven code generation that emits Go SDKs, CWIC commands, and Terraform resources from a single source of truth.
• Design and ship proto and API contracts, applying schema evolution and backwards-compatibility discipline, and help author and enforce CoreWeave API Standards in CI.
• Champion developer experience across the CLI, SDKs, and Terraform provider: ergonomics, release cadence, and the quality bars that make every other CoreWeave team faster.
• Work across authentication and identity, understanding how auth contracts (access keys, service accounts, JWKS, mTLS, and OIDC) flow from proto into generated clients.
• Act consultatively: help other teams design and ship good APIs and services.
• Drive team-level technical initiatives to completion and mentor junior and mid-level engineers.

Who You Are:

• Production experience writing Go.
• Experience designing and evolving APIs: versioning, backwards compatibility, and deprecation.
• Experience building or maintaining client tooling: SDKs, CLIs, or infrastructure providers (Terraform, Pulumi, or Crossplane).
• A track record of owning a project or initiative end to end and operating independently.
• Clear communication about your technical contributions and how you collaborate.

Preferred:

• Experience with code generation of any kind: codegen pipelines, templating, AST manipulation, or compiler/plugin work.
• Experience with gRPC and protocol buffers, or another strongly-typed API/IDL toolchain.
• Familiarity with the Buf toolchain, ConnectRPC, the Terraform Plugin Framework, or Cobra.

Wondering if you're a good fit?

We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams – even if you aren't a 100% skill or experience match. Here are a few qualities we've found compatible with our team. If some of this describes you, we'd love to talk.

• You love building tools that make other engineers faster.
• You're curious about how a single source of truth can drive many downstream surfaces without falling out of sync.
• You care about developer experience: clear error messages, sensible defaults, and interfaces that stay consistent as they grow.

Why CoreWeave?

At CoreWeave, we work hard, have fun, and move fast! We're in an exciting stage of hyper-growth that you will not want to miss out on. We're not afraid of a little chaos, and we're constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:

• Be Curious at Your Core
• Act Like an Owner
• Empower Employees
• Deliver Best-in-Class Client Experiences
• Achieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and enables the development of innovative solutions to complex problems. As we get set for takeoff, the organization's growth opportunities are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!

The base salary range for this role is $153,000 to $204,000. The starting salary will be determined based on job-related knowledge, skills, experience, and market location. We strive for both market alignment and internal equity when determining compensation. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).