Staff Software Engineer Infrastructure - Marimo

CoreWeave

Staff Software Engineer Infrastructure - Marimo

Posted 2 Hours Ago

5 Locations

In-Office or Remote

188K-275K Annually

Senior level

Cloud • Information Technology • Machine Learning

We empower creators and innovators with access to GPU resources they need to work more efficiently.

The Role

The Staff Software Engineer will design and implement the backend architecture for Marimo's molab focusing on high availability low latency and system stability while utilizing CoreWeave's infrastructure.

Summary Generated by Built In

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.

About Marimo:

At Marimo we're 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 you're passionate about developer tools thrive in ambiguous environments enjoy tackling challenging engineering problems and are excited by greenfield opportunities you'll 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 Marimo's 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 CoreWeave's 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 you’re 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 aren't a 100% skill or experience match. Here are a few qualities we’ve found compatible with our team. If some of this describes you we’d love to talk.

You love to build empower developers by building performant and scalable tools
You’re curious about how developers in AI ML and data experiment with models and code
You’re 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 compensation. In 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 we’ve 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 including:

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

California Consumer Privacy Act

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: [email protected].

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.

Skills Required

8+ years of experience in software engineering
Expertise in computer systems parallel computing and concurrency
Experience with containerization and orchestration (Kubernetes)
Experience building highly available fault-tolerant systems
Strong communication skills written and verbal

What the Team is Saying

CoreWeave Compensation & Benefits Highlights

Healthcare Strength—Health coverage is described as comprehensive including medical dental vision and mental-health resources. Feedback suggests employer-paid employee premiums and inclusive provisions (such as gender-affirming care) make coverage especially attractive.
Retirement Support—Retirement support includes a 401(k) with company matching. Feedback suggests this is a dependable component of the package alongside other financial benefits.
Flexible Benefits—Flexible PTO and hybrid/remote options are offered. Feedback suggests flexibility is supported by employer-verified language even as on-site hubs remain important.

Learn more about CoreWeave's Compensation & Benefits →

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The Company

HQ: Livingston NJ

1450 Employees

Year Founded: 2017

What We Do

CoreWeave the AI Hyperscaler™ delivers a cloud platform of cutting-edge software powering the next wave of AI. The company's technology provides enterprises and leading AI labs with cloud solutions for accelerated computing. Since 2017 CoreWeave has operated a growing footprint of data centers across the US and Europe. CoreWeave was ranked as one of the TIME100 most influential companies and featured on Forbes Cloud 100 ranking in 2024. Learn more at www.coreweave.com.

Why Work With Us

At CoreWeave we work hard have fun and move fast! Today we are a small growing team of intelligent genuine people that value different perspectives and approaches to solving complex problems. We foster an environment that champions collaboration and prioritizes innovative solutions. Here you are surrounded by the best.