Kastle, San Francisco
At Kastle our Infrastructure team is responsible for building the underlying systems that help thousands of people daily, make their largest and most important financial transactions.
We're looking for a Senior Infrastructure Engineer with deep distributed systems expertise to design, build, and operate the infrastructure that powers Kastle's AI agents in production at banks, lender and other financial institutions. You'll work on the hard problems of distributed systems — consistency, fault tolerance, horizontal scalability, and low-latency coordination — across AWS/GCP/Azure, Kubernetes, and Terraform, keeping compliance-critical systems reliable as we grow. This is an onsite role working closely with platform, ML, and security engineering.
Kastle is building the AI employee for financial services. We work with some of America's largest banks, helping them scale their operations using autonomous AI Agents that process payments, originate loans, and help customers get a world class experience during some of the biggest financial decisions of their lives.
We've processed over $2 billion in transactions and are backed by Insight Partners and Y Combinator. If you are interested in building AI that is applied in the real world where precision, reliability, and performance matter and redefine access to credit across the world, apply below.
We just raised a $24M Series A and are growing fast!
KastleSan Francisco
$180K–$275K / yr
Posted 6 days ago
KastleSan Francisco
$170K–$250K / yr
Posted Sep 9, 2025
KastleSan Francisco
$250K–$320K / yr
Posted Sep 9, 2025
KastleSan Francisco
$250K–$350K / yr
Posted Nov 22, 2025
KastleSan Francisco
$150K–$220K / yr
Posted Jan 19, 2026
KastleSan Francisco
Pay not posted
Posted 9 days ago
Source: the Y Combinator job board. We last checked this job 3 h ago. We first saw it 4 days ago. A job on a job board does not always mean that the team interviews people now.
This base pay is above the median for infrastructure, platform and SRE jobs in the Bay Area with no level in the job title.
We compare the middle of each posted range. This is base pay as posted. The group does not include this job.