Senior Software Engineer, Weave - Weights & Biases

What You’ll Do:

Weave is CoreWeave’s observability, evaluation, and monitoring platform for AI agents and GenAI applications. Our customers rely on Weave to build the auto-improving loop for their AI agents: including production tracing, offline evaluations, online monitoring and alerting.

About the Role:

We’re looking for Software Engineers to help build and scale Weave. In this foundational role on a small but growing team, you’ll design and ship core functionality, gather feedback directly from users and customers, and continuously improve the product experience. You’ll work closely with cutting-edge AI builders, developing the next generation of tools that help teams understand, evaluate, and iterate on their AI agents.

• Implement robust and ergonomic APIs.
• Design and build integrations with popular agent harnesses and SDKs such as Claude Code, Codex, pi.dev, OpenAI Agents SDK, etc.
• Scale and improve backend performance to support low-latency, high-volume production use cases.
• Build polished and intuitive features such online LLM judges, playgrounds, evaluations, labeling, and tracing UX.
• Partner directly with users to understand workflows, gather feedback, and rapidly iterate on solutions.
  
  

Who You Are

• Bachelor’s degree in Computer Science or related field.
• 8+ years of experience in Software Engineering.
• Deep knowledge of Python and/or TypeScript.
• Experience (personal or professional) in building AI agents.
• Ability to operate effectively amid ambiguity and adapt rapidly to a changing environment.
• Previous startup experience is a plus.

Preferred

• Experience managing large-scale online production services or OLAP databases.
  
  

Wondering if you’re a good fit? We believe in investing in our people and value candidates who bring diverse experiences — even if you aren’t a 100% match. Here are a few qualities that tend to resonate with our team:

• You thrive at the intersection of software, hardware, and ML infrastructure — from tuning distributed systems to scaling backend services.
• You’re passionate about building tools that developers love to use — intuitive APIs and UX that bring clarity and speed to AI workflows.
• You’re curious about the full AI lifecycle — from experiment tracking and model deployment to observability and evaluation — and want to shape an end-to-end platform that redefines how AI is built and scaled.

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 $165,000 to $220,000. 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).