Staff Engineer
- Location
- San Francisco, CA · On-site
- Job type
- Full-time
- Level
- Lead / Staff
- Listed
- 30 days ago
Skills & highlights for this role
- distributed systems
- real-time backend systems
- Python
- database performance optimization
Also useful
- Kubernetes
- production AI/ML systems
Stated benefits & perks
- Health
- Dental
- Vision
- 401k
- Gym
What You’ll Do
- Architect and own core systems that power real-time AI voice and compliance workflows
- Push performance boundaries, delivering sub-700ms latency leveraging event driven architecture and parallel processing
- Deploy, operate, scale, resilient systems using Kubernetes and distributed sub-systems
- 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.
What You Bring
- 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.
- A bias for ownership and an ability to figure things out in messy, high-velocity environments
Nice to Have
- Experience with training, designing, or building production AI/ML systems
- Previous startup or founder experience.
The Interview Process
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-hour live coding session with Founding Engineer
- 1-day onsite with team
Other Perks and Benefits
- Free gym membership
- Robust medical, vision, & dental coverage
- 401(K) plan offering
- Paid Company Meals
- Company offsites to get to know the team
About Kastle
Kastle is building the AI employee for banks. We work with some of America's financial institutions, 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.
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!
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
- Ability to move fast while your work impacting millions of customers. Add a new feature in a few days and ship it to top 10 lenders the next week.
- Competitive Compensation + Meaningful Equity at a high growth company
- High ownership and direct input on product direction, company culture, and how the FDE function scales
From Kastle AI's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.
How Rolev.ai helps with this application
Rolev.ai is a job search and application tool for US job seekers. For this Staff Engineer role at Kastle AI, it shows how your resume fits, tailors your resume to the posting, and prepares the application for you to review.
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Common questions
Where is the Staff Engineer job at Kastle AI located?
This Staff Engineer position at Kastle AI is located in San Francisco, CA (On-site). Always check Kastle AI's application page for specific state eligibility or relocation policies.
What qualifications are required for Staff Engineer at Kastle AI?
For the Staff Engineer role, Kastle AI highlights experience with distributed systems, real-time backend systems, Python, database performance optimization. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Staff Engineer position at Kastle AI?
This listing links directly to Kastle AI's Ashby application page. You can apply directly on Kastle AI's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.