Senior Software Engineer, Weave - Weights & Biases

Senior Software Engineer, Weave – Weights & Biases

Join to apply for the Senior Software Engineer, Weave – Weights & Biases role at Core Weave
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Core Weave is The Essential Cloud for AI™. Built for pioneers by pioneers, Core Weave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, Core Weave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability.

Founded in 2017, Core Weave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at

Weave is our new lightweight toolkit for tracking and evaluating GenAI applications. Our users rely on Weave to understand and improve their AI‑powered products — from Agents to Retrieval Augmented Generation (RAG) systems and beyond.

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 early adopters, 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 GenAI applications.

• Implement robust and ergonomic open‑source client APIs.
• Design and build integrations with popular LLM tools such as Llama Index, Lang Chain, and Instructor.
• Scale and improve backend performance to support low‑latency, high‑volume production use cases.
• Build polished and intuitive features such as multi‑modal evaluations, LLM playgrounds, and dataset editing/drill‑down capabilities.
• Partner directly with users to understand workflows, gather feedback, and rapidly iterate on solutions.

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

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

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 $175,000 to $275,000. In addition to base salary, the total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility). In addition to a competitive salary, we offer a variety of benefits to support your needs, including:

• Medical, dental, and vision insurance – 100% paid by Core Weave
• Company‑paid Life Insurance
• Voluntary supplemental life insurance
• Short and long‑term disability insurance
• Flexible Spending Account
• Health Savings Account
• Tuition Reimbursement
• 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