Staff Software Engineer, Infrastructure Marimo

About Marimo:

At Marimo were building the best open-source environment for working with data alongside a world-class cloud platform designed for scale performance and collaboration.

Marimo reimagines the Python notebook from first principles. It combines the interactivity of a next-generation reactive notebook with the flexibility of pure Python: notebooks can be versioned with Git deployed as data applications executed as scripts and imported as reusable modules. Originally incubated with scientists at Stanford marimo is now used by leading companies research labs and universities worldwide with millions of downloads and more than 17000 GitHub stars.

We believe that the tools we use shape the way we think. Better tools lead to better ideas faster iteration and deeper understanding. If youre passionate about developer tools thrive in ambiguous environments enjoy tackling challenging engineering problems and are excited by greenfield opportunities youll fit right in.

About the Team:

The molab team at Marimo develops a cloud-hosted marimo notebook service called molab. molab lets anyone in the world experiment with data build interactive apps and share their work for free all using the open-source marimo notebook and accelerated by AI-assisted coding. This is a high impact team and product undergoing rapid growth and working on many challenging greenfield problems with an emphasis on building highly available low latency and fault tolerant systems.

About the Role:

As a Staff Engineer on Marimos molab team you will co-design and implement the backend architecture of molab solving for high availability low latency (both the ability to rapidly spin up and spin down notebook kernels on demand as well as low latency communication between the notebook frontend and backend) stability and fraud and abuse. You will design molab to run on CoreWeaves specialized kubernetes-based clusters and integrate with CoreWeave object storage and will solve for keeping utilization of GPUs high.

Who You Are:

• 8 years of experience in software engineering
• Strong fundamentals that are language agnostic
• Expertise in computer systems including parallel computing (threading multiprocessing) concurrency (asynchronous programming) networking/inter-process communication
• Experience with containerization container orchestration (kubernetes) scheduling networked filesystems resource allocation distributed systems and cloud infrastructure
• Experience building highly available fault-tolerant systems
• Strong communication skills written and verbal

Preferred:

• Proficiency with Python and Python packaging
• Basic experience with or awareness of the Python stack for AI/ML
• Empathy for practitioners and researchers in AI ML data engineering NLP or other quantitative work
• Experience with GPU resource allocation and sharing

Wondering if youre a good fit We believe in investing in our people and value candidates who can bring their own diversified experiences to our teams even if you arent a 100% skill or experience match. Here are a few qualities weve found compatible with our team. If some of this describes you wed love to talk.

• You love to build empower developers by building performant and scalable tools
• Youre curious about how developers in AI ML and data experiment with models and code
• Youre an expert in building highly scalable cloud infrastructure

The base salary range for this role is $188000 to $275000. 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 addition to base salary our total rewards package includes a discretionary bonus equity awards and a comprehensive benefits program (all based on eligibility).

What We Offer

The range weve posted represents the typical compensation range for this role. To determine actual compensation we review the market rate for each candidate which can include a variety of factors. These include qualifications experience interview performance and location.

In addition to a competitive salary we offer a variety of benefits to support your needs. The benefits below reflect our US-based offerings; for roles in other locations benefits vary and are shared during the hiring process. These include:

• 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

California Applicants

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Equal Opportunity & Accommodations

CoreWeave is an equal opportunity employer committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race color religion sex disability age sexual orientation gender identity national origin veteran status or genetic information.

As part of this commitment and consistent with the Americans with Disabilities Act (ADA) CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process unless such accommodation would cause an undue hardship. If reasonable accommodation is needed please contact: .

Export Control Compliance

This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information applicant must either be (A) a U.S. person defined as a (i) U.S. citizen or national (ii) U.S. lawful permanent resident (green card holder) (iii) refugee under 8 U.S.C. 1157 or (iv) asylee under 8 U.S.C. 1158 (B) eligible to access the export controlled information without a required export authorization or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may for legitimate business reasons decline to pursue any export licensing process.