Senior Software Engineer II, ML Workflows - W&B

CoreWeave • San Francisco, NY

6d

About The Position

CoreWeave is hiring a Senior Software Engineer for the Weights & Biases (W&B) ML Workflows organization. Reporting to the Senior Engineering Manager for ML Workflows, this engineer will own the architecture and evolution of core W&B platform systems. ML Workflows includes Artifacts, the versioned data layer used by objects logged to W&B; Registry, an organization-wide source of truth for production-ready assets; Automations, the platform’s event and action layer; and Launch, execution infrastructure for customer ML and agent workloads.

The role owns systems end to end, from design through production reliability, and works across the W&B backend, Python SDK, and frontend. The engineer partners with product managers, designers, and ML platform engineers, and speaks directly with enterprise ML teams about their workflows. Senior engineers are matched to teams based on strengths and interests discussed during the interview process. As W&B products are built onto CoreWeave infrastructure, this role offers an opportunity to shape that work.

Requirements

• Bachelor’s degree or foreign equivalent in Computer Science, Computer Engineering, Data Science, Information Systems, or a closely related technical or quantitative field involving substantial coursework in Engineering.
• 8+ years of software engineering experience, including time leading significant technical initiatives or architectural changes.
• Strong proficiency in Go, or another compiled language such as C, C++, C#, Rust, or Java, with the ability to ramp up on Go quickly.
• Working proficiency in Python.
• Ability to investigate complex systems written by others and diagnose and fix difficult bugs across service boundaries.
• A track record of mentoring engineers and raising the technical bar.
• Strong communication skills, including the ability to explain complex technical decisions to different audiences.
• Deep expertise in at least one or two of these areas: distributed systems and infrastructure; frontend and full-stack development; data at scale; APIs and developer surfaces; or event-driven systems.

Nice To Haves

• Experience in ML infrastructure, MLOps, or developer tools.
• Expertise in areas such as production services, containers and Kubernetes, cloud infrastructure, orchestration, TypeScript and React, complex state management, frontend performance, schema design, query performance, large-scale storage, ClickHouse, API design, GraphQL optimization, SDKs and client libraries, Kafka or PubSub, delivery semantics, idempotency, and retries.

Responsibilities

• Own the architecture and evolution of a core platform area, designing systems that scale to billions of artifacts and high-volume event and job throughput.
• Analyze system architecture to identify optimization opportunities, solve complex bugs, and balance short-term delivery with long-term platform health.
• Work across Go backend services and GraphQL APIs, the Python SDK, and the TypeScript frontend as needed.
• Lead migrations and re-architecture of systems carrying live customer traffic while maintaining a seamless customer experience.
• Identify and refactor technical debt to improve maintainability and developer productivity.
• Establish engineering patterns and best practices as the platform grows.
• Collaborate with product and design to translate complex user requirements into technical implementations.
• Work directly with customers to understand ML workflow challenges and incorporate feedback into the product cycle.
• Mentor engineers and raise the team’s technical bar.

Benefits

• Medical, dental, and vision insurance, 100% paid for by CoreWeave for eligible US-based full-time employees.
• Company-paid life insurance.
• Voluntary supplemental life insurance.
• Short- and long-term disability insurance.
• Flexible Spending Account.
• Health Savings Account.
• Tuition reimbursement.
• Ability to participate in the Employee Stock Purchase Program (ESPP).
• Mental wellness benefits through Spring Health.
• Family-forming support provided by Carrot.
• Paid parental leave.
• Flexible, full-service childcare support with Kinside.
• 401(k) with an employer match.
• Flexible PTO.
• Catered lunch each day in office and data center locations.
• Casual work environment.
• Discretionary bonus and equity awards, based on eligibility.
• Comprehensive benefits program, based on eligibility.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior