Principal Engineer, API Platform

Core Weave•Bellevue, WA

27d•$206,000 - $303,000•Hybrid

About The Position

CoreWeave is seeking a Principal Engineer for our API Platform, working across the engineering organization to define and evolve our public API platform and developer interfaces. We're actively standardizing on a gRPC-first foundational interface (with generated REST) to accelerate delivery of SDKs, Terraform, and platform-wide consistency; the role will be a primary driver of this transition and its long-term technical direction.

Requirements

10+ years of experience building and operating public APIs and backend services in production, including ownership of reliability and security outcomes.
Proficiency in Go and experience with Terraform, protobuf/gRPC and REST design.
Strong understanding of cloud computing infrastructure using Kubernetes, scalable architectures, and automation.
Strong communication and leadership skills; track record of delivering cross-organizational initiatives as the technical lead
Excellent analytical and problem-solving skills, with the ability to synthesize problem statements from interactions with customers and design solutions given ambiguous requirements.
Solid grounding in CI/CD, testing strategies, and safe rollout/deprecation practices for API changes.
Prior contributions to Terraform providers or similar IaC tooling, including registry distribution, versioning, and upgrade guidance.
Strong observability skills (metrics, logs, tracing) and practical experience defining API SLIs/SLOs.

Nice To Haves

Experience with Kubernetes control-plane/API design patterns and CRD ergonomics; ability to bridge KRM and gRPC/REST interfaces where appropriate.
Experience with alternative IaC models such as Crossplane and Pulumi.
Expertise with API gateways, rate limiting, multitenancy, and edge security at scale.
Understanding of authentication, authorization, and policy frameworks; proven ability to integrate IAM into API surfaces with consistent semantics.

Responsibilities

Deliver a cohesive, reliable CoreWeave Cloud API that becomes the foundation for all developer touchpoints (Console, SDKs, CLI, IaC), enabling customers to self-serve provisioning and operations at scale.
Deliver an internal API Governance strategy to drive consistency and standardization of our public interfaces, and to increase velocity of internal stakeholders.
Drive our IaC-first strategy and enable day-one Terraform support for new GA products, accelerating time-to-first-production for customers and reducing operational load.
Establish and meet API reliability goals and partner with production engineering on SLIs/SLOs, observability, and incident response maturity.
Shape identity and access management evolution toward unified, fine-grained access policies across products, ensuring consistent authorization patterns and developer experience.