{"schemaVersion":"jobsearcher.job.v1","id":"d704bad5621f406b73839990","url":"https://jobsearcher.com/jobs/d704bad5621f406b73839990","canonicalUrl":"https://jobsearcher.com/jobs/d704bad5621f406b73839990","title":"Senior Software Engineer (Core Open-Source, Marimo)","description":"Requirements4+ years of experience in software engineeringProficiency in Python, with strong fundamentals that are language agnosticProficiency in computer systems, including parallel computing (threading, multiprocessing), concurrency (asynchronous programming), basic networking/inter-process communicationExperience in library design and/or open-source developmentStrong communication skills, written and verbal(Desirable) A passion for and experience building developer tools, especially for AI, ML, or data(Desirable) 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(Desirable) An eye for visual and interaction design, with an emphasis on simplicity(Desirable) You find enjoyment in connecting with users and community daily(Desirable) Proficiency in Typescript, or a willingness to learn(Desirable) Experience with AI engineering, including MCP and agents(Desirable) Experience with SQL, databases, and data engineering(Desirable) Experience with at least one systems language, such as C or RustWondering 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 talkYou love crafting developer tools, especially for AI, ML, or dataYou're curious about the day-to-day work of AI/ML/data engineers, researchers, and scientistsYou enjoy building in the open and engaging with your usersWhat the job involvesAs a senior software engineer on marimo's core open source team, you'll take ownership of projects across marimo's open-source ecosystem, focusing on marimo's backend and its Python ecosystem. You will influence critical decisions on library design, making sure our APIs remain simple yet composable; you'll also design new capabilities that push the boundaries of interactive computing without complicating the user experienceYou'll work in the open, at a fast pace — engaging promptly and empathetically with a large and vocal community of users and contributors, triaging their issues and reading between the lines to understand their unstated needs. All the while, you'll exercise judgment to balance the needs of our community with our own roadmap and vision #J-18808-Ljbffr","company":"CoreWeave","rawCompany":"coreweave","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-06-11T18:33:30.338Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Software Engineer (Core Open-Source, Marimo)","description":"Requirements4+ years of experience in software engineeringProficiency in Python, with strong fundamentals that are language agnosticProficiency in computer systems, including parallel computing (threading, multiprocessing), concurrency (asynchronous programming), basic networking/inter-process communicationExperience in library design and/or open-source developmentStrong communication skills, written and verbal(Desirable) A passion for and experience building developer tools, especially for AI, ML, or data(Desirable) 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(Desirable) An eye for visual and interaction design, with an emphasis on simplicity(Desirable) You find enjoyment in connecting with users and community daily(Desirable) Proficiency in Typescript, or a willingness to learn(Desirable) Experience with AI engineering, including MCP and agents(Desirable) Experience with SQL, databases, and data engineering(Desirable) Experience with at least one systems language, such as C or RustWondering 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 talkYou love crafting developer tools, especially for AI, ML, or dataYou're curious about the day-to-day work of AI/ML/data engineers, researchers, and scientistsYou enjoy building in the open and engaging with your usersWhat the job involvesAs a senior software engineer on marimo's core open source team, you'll take ownership of projects across marimo's open-source ecosystem, focusing on marimo's backend and its Python ecosystem. You will influence critical decisions on library design, making sure our APIs remain simple yet composable; you'll also design new capabilities that push the boundaries of interactive computing without complicating the user experienceYou'll work in the open, at a fast pace — engaging promptly and empathetically with a large and vocal community of users and contributors, triaging their issues and reading between the lines to understand their unstated needs. All the while, you'll exercise judgment to balance the needs of our community with our own roadmap and vision #J-18808-Ljbffr","datePosted":"2026-06-11T18:33:30.338Z","dateModified":"2026-06-11T18:33:30.338Z","hiringOrganization":{"@type":"Organization","name":"CoreWeave","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"d704bad5621f406b73839990"},"url":"https://jobsearcher.com/jobs/d704bad5621f406b73839990"}}