Senior Software Engineer, Metrics

Core Weave, the AI Hyperscaler™, acquired Weights & Biases to create the most powerful end-to-end platform to develop, deploy, and iterate AI faster. Since 2017, Core Weave has operated a growing footprint of data centers covering every region of the US and across Europe, and was ranked as one of the TIME
100 most influential companies of 2024. By bringing together Core Weave’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 Core Weave, 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.

The Metrics and Storage team at Weights & Biases builds the infrastructure that powers our flagship Models product, supporting experiment tracking and analytics for more than 2,500 leading AI and ML teams worldwide. We focus on scaling ingestion, storage, and query systems to handle petabytes of data while ensuring performance, reliability, and cost-effectiveness for our customers.

As a Senior Engineer on the Metrics and Storage team, you’ll lead efforts to scale our systems to meet the demands of our most advanced customers. You’ll own critical technical decisions around data ingestion and querying, balancing short-term deliverables with long-term architectural evolution. This role partners closely with product, revenue, and engineering teams across W&B to shape the future of our platform, ensuring that customers can rely on our infrastructure for training insights and large-scale analytics.

You’ll also mentor engineers and contribute to the overall growth and strength of the team.

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

• Experience mentoring junior engineers and fostering technical growth
• Background in building high‑scale metrics, logging, or analytics systems
• Familiarity with trade‑offs in designing cost‑optimized storage and query infrastructure

• 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

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…