{"schemaVersion":"jobsearcher.job.v1","id":"17f5e06db15b4d9dea987df4","url":"https://jobsearcher.com/jobs/17f5e06db15b4d9dea987df4","canonicalUrl":"https://jobsearcher.com/jobs/17f5e06db15b4d9dea987df4","title":"Senior Full Stack Engineer","description":"About KaizenKaizen is building the next generation of AI infrastructure by creating a sophisticated world engine—a simulated digital environment where AI models can learn, reason, and interact. We are looking for a highly capable Generalist Software Engineer who thrives on solving complex, first-principles engineering challenges and enjoys working at the intersection of software engineering and frontier AI research.Key ResponsibilitiesDesign, build, and maintain software replicas from the ground up, integrating them into Kaizen's world engine.Develop systems that ensure data consistency and coherence across large-scale simulated environments.Solve novel engineering challenges where traditional software design patterns may not apply.Build foundational infrastructure that powers complex AI simulation environments.Collaborate closely with researchers from leading Frontier AI labs to transform research requirements into scalable engineering solutions.Deliver high-quality, production-ready software with strong ownership throughout the development lifecycle.Contribute to the continuous improvement of engineering architecture, tooling, and performance.Required QualificationsBachelor's degree in Computer Science or a related field from a well-recognized university (preferred: Berkeley, Stanford, MIT, UIUC, Purdue, Caltech, Georgia Tech, or equivalent).2+ years of professional software engineering experience.Experience delivering end-to-end, user-facing software products.Strong programming skills in TypeScript, React, and Python.Solid understanding of software engineering fundamentals, system design, and scalable architecture.Excellent analytical and first-principles problem-solving skills.Ability to work independently in a fast-paced, startup environment.Preferred QualificationsExperience working at an AI-focused startup, VC-backed company, or top technology company (FAANG or equivalent).Exposure to AI/LLM-powered applications.Knowledge of Reinforcement Learning (RL).Personal projects or open-source contributions related to AI, autonomous agents, or intelligent systems.Demonstrated ownership, leadership, or rapid career growth.What We're Looking ForCuriosity and a passion for solving problems that have no existing playbook.Strong ownership mindset with the ability to take ideas from concept to production.Comfortable working in highly technical, research-driven environments.Excellent communication and collaboration skills across engineering and research teams.","company":"Crooter","rawCompany":"crooter","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-07-15T09:19:39.853Z","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":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"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 Full Stack Engineer","description":"About KaizenKaizen is building the next generation of AI infrastructure by creating a sophisticated world engine—a simulated digital environment where AI models can learn, reason, and interact. We are looking for a highly capable Generalist Software Engineer who thrives on solving complex, first-principles engineering challenges and enjoys working at the intersection of software engineering and frontier AI research.Key ResponsibilitiesDesign, build, and maintain software replicas from the ground up, integrating them into Kaizen's world engine.Develop systems that ensure data consistency and coherence across large-scale simulated environments.Solve novel engineering challenges where traditional software design patterns may not apply.Build foundational infrastructure that powers complex AI simulation environments.Collaborate closely with researchers from leading Frontier AI labs to transform research requirements into scalable engineering solutions.Deliver high-quality, production-ready software with strong ownership throughout the development lifecycle.Contribute to the continuous improvement of engineering architecture, tooling, and performance.Required QualificationsBachelor's degree in Computer Science or a related field from a well-recognized university (preferred: Berkeley, Stanford, MIT, UIUC, Purdue, Caltech, Georgia Tech, or equivalent).2+ years of professional software engineering experience.Experience delivering end-to-end, user-facing software products.Strong programming skills in TypeScript, React, and Python.Solid understanding of software engineering fundamentals, system design, and scalable architecture.Excellent analytical and first-principles problem-solving skills.Ability to work independently in a fast-paced, startup environment.Preferred QualificationsExperience working at an AI-focused startup, VC-backed company, or top technology company (FAANG or equivalent).Exposure to AI/LLM-powered applications.Knowledge of Reinforcement Learning (RL).Personal projects or open-source contributions related to AI, autonomous agents, or intelligent systems.Demonstrated ownership, leadership, or rapid career growth.What We're Looking ForCuriosity and a passion for solving problems that have no existing playbook.Strong ownership mindset with the ability to take ideas from concept to production.Comfortable working in highly technical, research-driven environments.Excellent communication and collaboration skills across engineering and research teams.","datePosted":"2026-07-15T09:19:39.853Z","dateModified":"2026-07-15T09:19:39.853Z","hiringOrganization":{"@type":"Organization","name":"Crooter","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"17f5e06db15b4d9dea987df4"},"url":"https://jobsearcher.com/jobs/17f5e06db15b4d9dea987df4"}}