Senior Software Engineer, W&B Agent - W&B

Coreweave; Sunnyvale (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

CoreWeave is seeking a Senior Full Stack Engineer for the ARIA Agent team in Sunnyvale, CA. You will own backend infrastructure, API design, and the React frontend powering the chat interface and billing UI, while building distributed systems for scalable agent conversations.

You’ll work closely with ML science, product, iOS, and SRE teams to deliver a fast, reliable, and delightful agent experience across the full AI lifecycle.

Qualifications

• Bachelor’s degree in Computer Science or a related field.
• 4+ years of full stack engineering with backend and React/TypeScript.
• Strong Python backend skills with async patterns and distributed state machines.
• Experience with Kubernetes and modern cloud-based architectures.

Responsibilities

• Own features across the entire stack from backend to React frontend.
• Build and maintain distributed worker systems for agent conversations.
• Design streaming architecture for real-time token output.
• Collaborate with ML science, product, iOS, and SRE teams.

Skills

Python backend

Full stack

React frontend

Distributed systems

Education

Bachelor’s degree in CS or related field

Tools

FastAPI

Kubernetes

React

Job description

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave 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, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at www.coreweave.com.

Weights & Biases at CoreWeave

CoreWeave acquired Weights & Biases to create the most powerful end-to-end platform to develop, deploy, and iterate AI faster. CoreWeave operates a growing footprint of data centers covering every region of the US and across Europe, and was ranked as one of the TIME100 most influential companies of 2024. By bringing together CoreWeave’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 CoreWeave, 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.

What You’ll Do:

ARIA is the AI Research and Iterations Agent that enables continuous experimentation at scale. The engineering team is responsible for building this research agent from scratch by leveraging distributed backend systems that execute multi-turn agent conversations, to the React UI that thousands of ML practitioners interact with every day. Our mission is to ship a fast, reliable, and delightful agent experience that genuinely accelerates ML workflows, and every engineer on the team owns that outcome end to end.

As a Senior Full Stack Engineer on the ARIA Agent team, you'll own features and systems across the entire stack — from backend infrastructure and API design to the React frontend that powers the chat interface, billing UI, and agent configuration experience. You'll build and maintain the distributed worker systems that run agent conversations at scale, design the streaming architecture that delivers real-time token output to the browser, and contribute to the frontend components that make ARIA feel fast and intuitive. You'll collaborate closely with ML science, product, iOS, and SRE teams — blending reliability engineering with product sensibility. Day to day, you'll move fluidly between debugging a production memory leak in a Kubernetes worker, shipping a new billing UI component, and hardening the egress controls on the code execution sandbox.

About the role:

As a Senior Full Stack Engineer on the ARIA Agent team, you'll own features and systems across the entire stack — from backend infrastructure and API design to the React frontend that powers the chat interface, billing UI, and agent configuration experience. You'll build and maintain the distributed worker systems that run agent conversations at scale, design the streaming architecture that delivers real-time token output to the browser, and contribute to the frontend components that make ARIA feel fast and intuitive. You'll collaborate closely with ML science, product, iOS, and SRE teams — blending reliability engineering with product sensibility. Day to day, you'll move fluidly between debugging a production memory leak in a Kubernetes worker, shipping a new billing UI component, and hardening the egress controls on the code execution sandbox.

Who You Are:

• Bachelor’s degree or foreign equivalent in Computer Science, Computer Engineering, Data Science, Information Systems, or a closely related technical or quantitative field involving substantial coursework in Engineering.
• 4+ years of full stack engineering experience, with meaningful depth in both backend services and React/TypeScript frontend development.
• Strong Python backend skills — async patterns, FastAPI, distributed state machines, Kubernetes pod lifecycle.
• Profic