{"schemaVersion":"jobsearcher.job.v1","id":"642c3d77c247dc617a998405","url":"https://jobsearcher.com/jobs/642c3d77c247dc617a998405","canonicalUrl":"https://jobsearcher.com/jobs/642c3d77c247dc617a998405","title":"Senior JavaScript Engineer","description":"Hyperparam is building a new kind of frontend application for working with massive LLM datasets.About Hyperparam\r\nDescription\r\nHyperparam is building a new kind of frontend application for working with massive LLM datasets.You can see examples of our open-source work here:This opportunity is hybrid in-person in Seattle at a seed-stage startup. You would be one of the very first employees, working side-by-side with an experienced team building a new kind of dataset curation tool. This will require intense work ethic, dedication, creativity, and independence that is necessary at an early stage startup. For the right candidate, this is a unique opportunity to build a company from the earliest idea stages to building a product used by real customers.Responsibilities:Develop and maintain a highly interactive web application for visualizing and manipulating large-scale ML datasets.Implementing efficient client-side data structures for real-time filtering and aggregation of millions of recordsImplement advanced data visualizations using d3, vega, or similar libraries.Leverage web workers and other multithreading techniques to enhance application responsiveness.Collaborate closely with machine learning engineers and data scientists to integrate machine learning functionalities.Contribute to architectural decisions to improve scalability and maintainability.Experience profiling and optimizing complex web applicationsExperience building complex and performant React.js apps and components.Proficiency in data visualization libraries: d3, vega, etc.Additional Skills:Familiarity with machine learning concepts and handling large datasets.Excellent problem-solving abilities and attention to detail.Ability to operate independently in a small startup environment.Passion for staying current with emerging technologies and best practices.What We Offer:Get in on the ground level of a funded seed start startup.Work side-by-side with experienced entrepreneurs who care deeply about advancing AI.A collaborative and close-knit work environment with a small team of highly motivated engineers, located in-person in Seattle.Competitive salary, equity, and comprehensive benefits package.Opportunity to work on groundbreaking projects in the ML and data visualization space.A collaborative and close-knit work environment with a small team of highly motivated engineers.#J-18808-Ljbffr","company":"Hyperparam","rawCompany":"hyperparam","city":"Seattle","state":"WA","isRemote":false,"isActive":false,"createdAt":"2026-11-05T01:53:54.104Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-2051.00","title":"Data Scientists","slug":"data-scientists"}],"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 JavaScript Engineer","description":"Hyperparam is building a new kind of frontend application for working with massive LLM datasets.About Hyperparam\r\nDescription\r\nHyperparam is building a new kind of frontend application for working with massive LLM datasets.You can see examples of our open-source work here:This opportunity is hybrid in-person in Seattle at a seed-stage startup. You would be one of the very first employees, working side-by-side with an experienced team building a new kind of dataset curation tool. This will require intense work ethic, dedication, creativity, and independence that is necessary at an early stage startup. For the right candidate, this is a unique opportunity to build a company from the earliest idea stages to building a product used by real customers.Responsibilities:Develop and maintain a highly interactive web application for visualizing and manipulating large-scale ML datasets.Implementing efficient client-side data structures for real-time filtering and aggregation of millions of recordsImplement advanced data visualizations using d3, vega, or similar libraries.Leverage web workers and other multithreading techniques to enhance application responsiveness.Collaborate closely with machine learning engineers and data scientists to integrate machine learning functionalities.Contribute to architectural decisions to improve scalability and maintainability.Experience profiling and optimizing complex web applicationsExperience building complex and performant React.js apps and components.Proficiency in data visualization libraries: d3, vega, etc.Additional Skills:Familiarity with machine learning concepts and handling large datasets.Excellent problem-solving abilities and attention to detail.Ability to operate independently in a small startup environment.Passion for staying current with emerging technologies and best practices.What We Offer:Get in on the ground level of a funded seed start startup.Work side-by-side with experienced entrepreneurs who care deeply about advancing AI.A collaborative and close-knit work environment with a small team of highly motivated engineers, located in-person in Seattle.Competitive salary, equity, and comprehensive benefits package.Opportunity to work on groundbreaking projects in the ML and data visualization space.A collaborative and close-knit work environment with a small team of highly motivated engineers.#J-18808-Ljbffr","datePosted":"2026-11-05T01:53:54.104Z","dateModified":"2026-11-05T01:53:54.104Z","hiringOrganization":{"@type":"Organization","name":"Hyperparam","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Seattle","addressRegion":"WA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"642c3d77c247dc617a998405"},"url":"https://jobsearcher.com/jobs/642c3d77c247dc617a998405"}}