Senior Software Engineer, molab

About the role

The molab team 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.

Responsibilities

• Help 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).
• Solve for stability, and prevent fraud and abuse.
• Build product features as needed, such as secret management.

Requirements

5+ years of experience in software engineering

Strong fundamentals that are language agnostic

Experience with 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

Building highly available, fault-tolerant systems

Strong communication skills, written and verbal

Qualifications

• Preferred proficiency with Python and Python packaging
• Basic experience with or awareness of the Python stack for AI/MLE
• Empathy for practitioners and researchers in AI, ML, data engineering, NLP, or other quantitative work

Skills

• 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

Benefits

• The base salary range for this role is $165,000 to $242,000.
• 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

• 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

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.

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.