Kastle
Staff Engineer
San Francisco · Staff+
Sponsorship not specifiedDetected 316 days ago
PythonDistributed SystemsKubernetesMachine LearningAgentic AI
About the role
- We've processed over $1 billion in transactions and are backed by Y Combinator and Commerce Ventures.
- THE INTERVIEW PROCESS We respect your time.
- 1-hour live coding session with Founding Engineer 3.
Responsibilities
- Architect and own core systems that power real-time AI voice and compliance workflows
- Build a self-improving AI system that improves with every customer interaction and human feedback
- Ship fast, ship right from whiteboard design to live production in bank environments.
Requirements
- A bias for ownership and an ability to figure things out in messy, high-velocity environments
- Strong fundamentals in building high-performance, real-time backend systems (we work primarily in Python).
- Deep understanding of distributed systems, reliability, and fault tolerance.
- Excellent database design and performance optimization skills.
- We respect your time. Our process is short and designed to let you showcase how you think:
- 15-min call with Talent Lead to learn more about the role
- 1-day onsite with team
- Why join Kastle
- Opportunity to work with a world class team building a generational AI company that will redefine how every loan in America is made and managed
Nice to have
- Experience with training, designing, or building production AI/ML systems
- Previous startup or founder experience.
- We respect your time.
- 1-hour live coding session with Founding Engineer
- Add a new feature in a few days and ship it to top 10 lenders the next week.
- High ownership and direct input on product direction, company culture, and how the FDE function scales
- 401(K) plan offering
- Paid Company Meals
Compensation
- Competitive Compensation + Meaningful Equity at a high growth company
Benefits
- Competitive Compensation + Meaningful Equity at a high growth company
- Free gym membership
- Robust medical, vision, & dental coverage
Company info
- Kastle is building the AI employee for consumer lending.
- We work with some of America's largest banks and mortgage lenders, helping them scale their contact center and compliance operations using autonomous AI Agents that process payments, originate loans, and help customers get a world class experience during the biggest financial decisions of their lives.
- 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.
- Ability to move fast while your work impacting millions of customers.
This listing is sourced directly from Kastle's careers page and normalized into a canonical job model.