{"schemaVersion":"jobsearcher.job.v1","id":"eb3a52a196e5ea1caf7dda1e","url":"https://jobsearcher.com/jobs/eb3a52a196e5ea1caf7dda1e","canonicalUrl":"https://jobsearcher.com/jobs/eb3a52a196e5ea1caf7dda1e","title":"Staff Engineer","description":"About Kastle\nKastle is building the AI operating system for consumer lending. We partner with some of America’s largest mortgage lenders to transform their contact centers and compliance operations with AI voice agents.\n\nBacked by Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, we’re redefining how millions of borrowers interact with financial institutions and how lenders operate at scale.\n\nThis is a rare chance to join at the ground floor of a company already plugged into large-scale customers and real production use cases.\n\nWhat You’ll Do\n\nArchitect and own core systems that power real-time AI voice and compliance workflows\n\nPush performance boundaries, delivering sub-700ms latency leveraging event driven architecture and parallel processing\n\nDeploy, operate, scale, resilient systems using Kubernetes and distributed sub-systems\n\nBuild a self-improving AI system that improves with every customer interaction and human feedback\n\nShip fast, ship right from whiteboard design to live production in bank environments.\n\nWhy Join Kastle?\n\nBuild what banks run on : Your code won’t sit in a sandbox, it’ll power real borrower interactions at scale.\n\nAct like a founder : High ownership, autonomy, and input on product, tech, and culture.\n\nLearn fast : Daily exposure to customers and their feedback loops.\n\nStrong upside : Competitive salary, meaningful early-stage equity, and a front-row seat to building a category-defining company.\n\nGreat team : Work side‑by‑side with a world‑class founding team from Verkada, NVIDIA, Apple, and Redfin.\n\nWhat You Bring\n\nStrong fundamentals in building high-performance, real-time backend systems (we work primarily in Python).\n\nDeep understanding of distributed systems, reliability, and fault tolerance.\n\nExcellent database design and performance optimization skills.\n\nA bias for ownership and an ability to figure things out in messy, high-velocity environments\n\nNice to Have\n\nExperience with training, designing, or building production AI/ML systems\n\nPrevious startup or founder experience.\n\n#J-18808-Ljbffr","company":"Kastle","rawCompany":"kastle","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-06-29T03:21:26.773Z","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":"15-1221.00","title":"Computer and Information Research Scientists","slug":"computer-and-information-research-scientists"}],"industries":[{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Staff Engineer","description":"About Kastle\nKastle is building the AI operating system for consumer lending. We partner with some of America’s largest mortgage lenders to transform their contact centers and compliance operations with AI voice agents.\n\nBacked by Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, we’re redefining how millions of borrowers interact with financial institutions and how lenders operate at scale.\n\nThis is a rare chance to join at the ground floor of a company already plugged into large-scale customers and real production use cases.\n\nWhat You’ll Do\n\nArchitect and own core systems that power real-time AI voice and compliance workflows\n\nPush performance boundaries, delivering sub-700ms latency leveraging event driven architecture and parallel processing\n\nDeploy, operate, scale, resilient systems using Kubernetes and distributed sub-systems\n\nBuild a self-improving AI system that improves with every customer interaction and human feedback\n\nShip fast, ship right from whiteboard design to live production in bank environments.\n\nWhy Join Kastle?\n\nBuild what banks run on : Your code won’t sit in a sandbox, it’ll power real borrower interactions at scale.\n\nAct like a founder : High ownership, autonomy, and input on product, tech, and culture.\n\nLearn fast : Daily exposure to customers and their feedback loops.\n\nStrong upside : Competitive salary, meaningful early-stage equity, and a front-row seat to building a category-defining company.\n\nGreat team : Work side‑by‑side with a world‑class founding team from Verkada, NVIDIA, Apple, and Redfin.\n\nWhat You Bring\n\nStrong fundamentals in building high-performance, real-time backend systems (we work primarily in Python).\n\nDeep understanding of distributed systems, reliability, and fault tolerance.\n\nExcellent database design and performance optimization skills.\n\nA bias for ownership and an ability to figure things out in messy, high-velocity environments\n\nNice to Have\n\nExperience with training, designing, or building production AI/ML systems\n\nPrevious startup or founder experience.\n\n#J-18808-Ljbffr","datePosted":"2026-06-29T03:21:26.773Z","dateModified":"2026-06-29T03:21:26.773Z","hiringOrganization":{"@type":"Organization","name":"Kastle","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"eb3a52a196e5ea1caf7dda1e"},"url":"https://jobsearcher.com/jobs/eb3a52a196e5ea1caf7dda1e"}}