Senior Software Engineer, Metrics Platform - Weights & Biases

Weights & Biases; Sunnyvale (CA); On-site; USD 139,000 - 204,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with employer match

Paid parental leave

Tuition reimbursement

Flexible PTO

Catered lunch or snacks

Casual work environment

Job summary

CoreWeave, the AI hyperscaler, is seeking a Software Engineer to scale the Metrics Platform powering Weights & Biases. You will drive backend performance, data ingestion, and API design for clients using very large storage footprints.

You will collaborate with product and engineering teams across CoreWeave and Weights & Biases, mentor engineers, and help shape long‑term architectural decisions while delivering reliable, cost‑effective systems.

Qualifications

• 4+ years of experience in software engineering with a focus on backend performance and distributed systems.
• Proficiency in at least one modern programming language (Python, Go, TypeScript).
• Experience designing and scaling customer-facing APIs in production with systems such as MySQL, ClickHouse, Bigtable, Pub/Sub, or Kafka.
• Hands-on experience with Kubernetes, Terraform, and at least one major cloud provider (GCP, AWS, or Azure).

Responsibilities

• Scale the metrics and storage systems behind Weights & Biases’ flagship Models product.
• Set technical direction and balance near-term deliverables with long-term architectural improvements.
• Mentor engineers and promote best practices across the organization.

Skills

Backend performance

Distributed systems

APIs design

Python

Go

TypeScript

Kubernetes

Terraform

Cloud providers

MySQL

ClickHouse

Bigtable

Pub/Sub

Kafka

Tools

Kubernetes

Terraform

MySQL

ClickHouse

Job description

CoreWeave, the AI Hyperscaler™, acquired Weights & Biases to create the most powerful end‑to‑end platform to develop, deploy, and iterate AI faster. Since 2017, CoreWeave has operated a growing footprint of data centers covering every region of the US and across Europe, and was ranked as one of the TIME100 most influential companies of 2024. By bringing together CoreWeave’s industry‑leading cloud infrastructure with the best‑in‑class tools AI practitioners know and love from Weights & Biases, we’re setting a new standard for how AI is built, trained, and scaled.

The integration of our teams and technologies is accelerating our shared mission: to empower developers with the tools and infrastructure they need to push the boundaries of what AI can do. From experiment tracking and model optimization to high‑performance training clusters, agent building, and inference at scale, we’re combining forces to serve the full AI lifecycle — all in one seamless platform.

Weights & Biases has long been trusted by over 1,500 organizations — including AstraZeneca, Canva, Cohere, OpenAI, Meta, Snowflake, Square, Toyota, and Wayve — to build better models, AI agents and applications. Now, as part of CoreWeave, that impact is amplified across a broader ecosystem of AI innovators, researchers, and enterprises.

As we unite under one vision, we’re looking for bold thinkers and agile builders who are excited to shape the future of AI alongside us. If you’re passionate about solving complex problems at the intersection of software, hardware, and AI, there’s never been a more exciting time to join our team.

What You’ll Do

• The Metrics Platform team builds and scales the infrastructure behind Weights & Biases’ flagship Models product, which powers experiment tracking and analytics for over 2,500 of the world’s leading AI and ML teams.
• The team focuses on data ingestion, storage, and querying at a petabyte scale, optimizing for performance, reliability, and cost‑effectiveness.

About The Role

As a Software Engineer, you’ll lead efforts to scale our metrics and storage systems to meet the needs of our most advanced customers. Day to day, you’ll set technical direction, balancing near‑term deliverables with long‑term architectural improvements. You’ll partner with product, revenue, and engineering teams across W&B to evolve our platform and ensure it continues to meet customer demands. You’ll also help mentor engineers and drive best practices across the organization.

Who You Are

• 4+ years of experience in software engineering, with a focus on backend performance and/or distributed systems
• Strong software engineering fundamentals and proficiency in at least one modern programming language (Python, Go, TypeScript, etc.)
• Experience designing and scaling customer‑facing APIs in production, ideally leveraging systems such as MySQL, Clickhouse, Bigtable, Pub/Sub, or Kafka
• Hands‑on experience with Kubernetes, Terraform, and at least one major cloud provider (GCP, AWS, or Azure)

Preferred

• Experience mentoring junior engineers and collaborating with other business functions
• Background in large‑scale metrics, logging, or analytics systems
• Familiarity with designing cost‑optimized storage and query infrastructure

Wondering if you’re a good fit?

• You love building scalable systems that handle massive amounts of data efficiently
• You’re curious about how ML teams use metrics and analytics to accelerate research
• You’re an expert in distributed systems and API design

Why Us?

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 provides the opportunity to develop innovative solutions to complex problems. As we get set for takeoff, the growth opportunities within the organization 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 $139,000 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).

What We Offer

The range we’ve posted represents the typical compensation range for this role. To determine actual compensation, we review the market rate for each candidate which can include a variety of factors. These include qualifications, experience, interview performance, and location.

In addition to a competitive salary, we offer a variety of benefits to support your needs. The benefits below reflect our US‑based offerings; for roles in other locations, benefits vary and are shared during the hiring process.

• Medical, dental, and vision insurance — 100% paid for by CoreWeave
• Company‑paid Life Insurance
• Voluntary supplemental life insurance
• Short and long‑term disability insurance
• Flexible Spending AccountHealth Savings Account
• Tuition Reimbursement
• Ability to Participate in 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 a generous employer match
• Flexible PTO
• Catered lunch each day in our office and data center locations
• A casual work environment
• A work culture focused on innovative disruption

California Applicants

California Consumer Privacy Act

Equal Opportunity & Accommodations

CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.

As part of this commitment and consistent with the Americans with Disabilities Act (ADA), CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact: [e-mail].

Export Control Compliance

This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (green card holder), (iii) refugee under 8 U.S.C. 1157, or (iv) asylee under 8 U.S.C. 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process.