Senior Software Engineer, molab
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About the role
As a senior engineer on marimo's molab team, you will 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), stability, and fraud and abuse. You will also be involved in building product features as needed, such as secret management.
Responsibilities
- On the marimo team, we believe that the tools we use shape the way we think - better tools, for better minds. If you're passionate about developer tools, thrive in ambiguity, enjoy solving challenging engineering problems at scale, and yearn for greenfield problems, you'll fit right in.
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
- 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
- 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
Additional Information
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 .
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