CoreWeave · 15 hours ago
Senior Software Engineer, Core Open-Source- Weights & Biases
Livingston, NJ
Full-time
Hybrid
Mid, Senior Level
$165K/yr - $242K/yr
4+ years expCoreWeave is The Essential Cloud for AI™, delivering a platform of technology and tools for innovators. As a senior software engineer on the marimo core open source team, you will take ownership of projects, focusing on backend development and influencing library design while engaging with a community of users and contributors.
Artificial Intelligence (AI)Cloud ComputingInformation TechnologyAI InfrastructureCloud InfrastructureMachine Learning
No H1B
U.S. Citizen Only
Responsibilities
Take ownership of projects across marimo's open-source ecosystem, focusing on marimo's backend and its Python ecosystem
Influence critical decisions on library design, ensuring APIs remain simple yet composable
Design new capabilities that push the boundaries of interactive computing without complicating the user experience
Work in the open, engaging promptly and empathetically with a large and vocal community of users and contributors
Triaging user issues and understanding their unstated needs while balancing community needs with the roadmap and vision
Qualification
Required
4+ years of experience in software engineering
Proficiency in Python, with strong fundamentals that are language agnostic
Proficiency in computer systems, including parallel computing (threading, multiprocessing), concurrency (asynchronous programming), basic networking/inter-process communication
Experience in library design and/or open-source development
Strong communication skills, written and verbal
Preferred
A passion for and experience building developer tools, especially for AI, ML, or data
A passion for working with data, with the ability to empathize with practitioners and researchers in AI, ML, data engineering, NLP, or other quantitative work
An eye for visual and interaction design, with an emphasis on simplicity
You find enjoyment in connecting with users and community daily
Proficiency in Typescript, or a willingness to learn
Experience with AI engineering, including MCP and agents
Experience with SQL, databases, and data engineering
Experience with at least one systems language, such as C or Rust
Benefits
Medical, dental, and vision insurance - 100% paid for by CoreWeave
Company-paid Life Insurance
Voluntary supplemental life insurance
Short and long-term disability insurance
Flexible Spending Account
Health Savings Account
Tuition Reimbursement
Ability to Participate in 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
Company
CoreWeave
CoreWeave is a cloud-based AI infrastructure company offering GPU cloud services to simplify AI and machine learning workloads.
1001-5000 employees
Funding
Current Stage
Public CompanyTotal Funding
$26.87BKey Investors
NVIDIAGoldman Sachs,JP Morgan Chase,Morgan Stanley,MUFG Union BankJane Street Capital
2026-01-26Post Ipo Equity· $2B
2025-12-08Post Ipo Debt· $2.54B
2025-11-12Post Ipo Debt· $2.5B
Leadership Team
Michael Intrator
Chief Executive Officer
Brannin McBee
Founder & CDO
Recent News
2026-02-09
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2026-02-08
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