Fullstack Engineer, Billing- Weights & Biases

What You’ll Do

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.

About the role

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.

Who You Are

• 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.
  
  

Preferred

• 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.

Wondering if you’re a good fit?

• 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.

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 $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 salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).