Software Engineer, Billing

Software Engineer, Billing

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.

You’ll join the Billing Engineering team, responsible for building and evolving the systems that power how our customers are billed for their usage across AI workloads. This isn’t a space with established playbooks — we’re designing billing systems that fit a new generation of AI products, where no one has fully figured out what “right” looks like yet.

This role sits at the intersection of engineering, product design, and the evolving economics of AI. As a Full Stack Engineer on the Billing team, you’ll help create the systems that determine how our customers understand, control, and pay for their usage — a space where thoughtful engineering directly shapes user trust and business value. You’ll design and build end‑to‑end features across Go and React, collaborating closely with teammates to refine what success looks like as we learn.

In a fast‑moving field without clear precedents, you’ll have meaningful influence and abundant opportunities to grow.

• 1–3 years of experience building web applications, or equivalent personal projects that demonstrate full‑stack ability.
• Familiar with Go, React, or similar technologies, and eager to deepen your expertise in both backend and frontend development.
• Comfortable building and connecting systems through APIs, and curious about how those connections shape the product experience.
• Experience thinking about performance and stability in real‑world systems — for example, optimizing queries, caching data, or handling edge cases gracefully.
• Bonus: you’ve built something end‑to‑end that people actually use — even if it’s just for fun or for yourself.

• Interested in how user incentives and perceptions of value are driven by pricing and product design.
• Passionate about understanding how thoughtful software design can drive flexibility, empower better user experiences, and enable the business to adapt to evolving needs.
• Energized by exploring open problems and helping shape what success looks like alongside your team.
• Someone who enjoys collaborating across disciplines and helping others learn as you do.

• You love taking ownership of projects and seeing them through to something real people use.
• You’re curious about how new business models — like usage‑based pricing — can shape the AI ecosystem.
• You enjoy small, fast‑moving teams where learning and iteration are constant.

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

The base salary range for this role is $109,000 to $160,000. 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…