Senior Software Engineer, ML Workflows - Weights & Biases

Responsibilities

You will own the architecture and evolution of core systems within the Weights & Biases platform, ensuring scalability and reliability from design through production. You will work across the full stack, collaborating with product teams and customers to solve complex ML workflow challenges.

Requirements

Candidates must have a bachelor's degree in a technical field and at least 6 years of software engineering experience with a focus on architectural initiatives. Strong proficiency in Go or another compiled language, along with experience in Python and distributed systems, is required.

Skills

• Go
• Python
• Distributed systems
• Kubernetes
• Cloud infrastructure
• GraphQL
• TypeScript
• React
• ClickHouse
• Kafka
• MLOps
• System architecture
• API design
• Software engineering
• Mentoring

Benefits

• Medical insurance
• Dental insurance
• Vision insurance
• Life insurance
• Short-term disability insurance
• Long-term disability insurance
• Flexible spending account
• Health savings account
• Tuition reimbursement
• Employee stock purchase program
• Mental wellness benefits
• Family-forming support
• Paid parental leave
• Childcare support
• 401(k) with employer match
• Flexible PTO
• Catered lunch

About this role

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.
About the Role:
Reporting to the Senior Engineering Manager for ML Workflows, this Senior Software Engineer will own the architecture and evolution of core systems in the Weights & Biases platform.
ML Workflows owns what customers use to move models and data through W&B. Artifacts is the versioned data layer that every object logged to W&B runs through. Registry sits on top of it as the organization-wide source of truth for what is production-ready, and it is used by teams at Pinterest, Dropbox, and Canva. Automations is the event and action layer the rest of the platform builds on. Launch is execution infrastructure that runs customer ML and agent workloads.
You will own systems end to end, from design through production reliability, working across the W&B backend, the Python SDK, and the frontend. You will partner closely with product managers, designers, and ML platform engineers, and you will talk directly to enterprise ML teams about their workflows. We hire senior engineers into the organization and match them to a team based on their strengths and interests, which we discuss with you during the interview process.
W&B is part of CoreWeave, so these products are being built onto CoreWeave infrastructure, and there is real room to shape how that happens.
What You'll Do
Own the architecture and evolution of a core platform area, designing systems that scale to billions of artifacts and high-volume event and job throughput.
Dive deep into system architecture to find optimization opportunities, solve complex bugs, and make the difficult calls that balance short-term delivery against long-term platform health.
Work across the stack as the problem requires, from Go backend services and GraphQL APIs to the Python SDK and the TypeScript frontend.
Lead migrations and re-architecture of systems carrying live customer traffic, keeping the experience seamless for the customers who depend on them.
Identify and refactor technical debt, improving maintainability and developer productivity.
Establish engineering patterns and best practices that hold up as the platform grows.
Collaborate with product and design to turn complex user requirements into clean technical implementations.
Work directly with customers to understand their ML workflow challenges, and bring that feedback into the product cycle.
Mentor engineers and raise the technical bar across the team.

What We're Looking For
We expect all of these:
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.
6+ years of software engineering experience, including time leading significant technical initiatives or architectural changes
Strong proficiency in Go, or in another compiled language (C, C++, C#, Rust, Java) with the ability to ramp on Go quickly
Working proficiency in Python
Comfort diving into complex systems you did not write, to diagnose and fix difficult bugs across service boundaries
A track record of mentoring engineers and raising the technical bar around you
Strong communication, including the ability to explain complex technical decisions to different audiences
And real depth in at least one or two of these, which is also how we work out which team you join:
Distributed systems and infrastructure. Designing and operating services in production, containers and Kubernetes, cloud infrastructure, orchestration.
Frontend and full-stack. TypeScript and React, complex state management, frontend performance work, taking a feature all the way through to the UI.
Data at scale. Schema design, query performance, large-scale storage, and analytical stores such as ClickHouse.
APIs and developer surfaces. API design, GraphQL query optimization and data fetching strategies, SDKs and client li...

About CoreWeave

Technology, Information and Internet · 1,001-5,000 employees · headquartered in New York, NY · founded 2017