Founding Infrastructure Engineer

Sela AI • San Francisco, CA

2d • Hybrid

About The Position

Sela is hiring a Founding Infrastructure Engineer to own and scale the infrastructure supporting its AI voice agent for mortgage lenders. The role focuses on secure, reliable, low-latency systems and spans infrastructure security, AWS, reliability, observability, incident response, infrastructure-as-code, Kubernetes, CI/CD, and support for customer security reviews and compliance efforts, including SOC 2 Type II. The engineer will also build secure patterns for internal AI agent use cases.

Sela describes itself as a fast-growing, well-funded company with enterprise customers among major independent mortgage banks. The team works on real-time voice infrastructure, with goals including 99.9% uptime, enterprise-grade privacy and security, and advanced simulation, evaluation, and testing systems. The role follows a hybrid schedule: four days a week together in San Francisco, with a flexible remote day on Wednesdays.

Requirements

• At least 5 years of experience in infrastructure, DevOps, platform, or SRE roles.
• Experience working at an early-stage startup, ideally from Seed through Series C.
• Hands-on experience building and operating cloud infrastructure, ideally AWS.
• Strong understanding of infrastructure-as-code, Kubernetes, CI/CD, networking, and cloud security best practices.
• Experience running production systems with high reliability requirements.
• Experience working with systems that handle sensitive customer or consumer data.
• Strong judgment and ability to prioritize without over-engineering.
• Comfort operating independently in a fast-moving startup environment.

Nice To Haves

• Experience as a founding or first infrastructure hire.
• Experience with real-time voice, telephony, or streaming systems.
• Previous experience in fintech, financial services, or another regulated environment.
• Experience leading SOC 2 or similar compliance efforts.
• Experience securing AI/LLM applications or agent workflows.

Responsibilities

• Own infrastructure security, including identity, access, secrets, and encryption.
• Own and scale AWS infrastructure for real-time, low-latency voice systems.
• Drive reliability, observability, and incident response to maintain 99.9% uptime.
• Build and maintain infrastructure-as-code, Kubernetes, and CI/CD pipelines.
• Build secure patterns for internal AI agent use cases.
• Support customer security reviews and compliance efforts, including SOC 2 Type II.

Benefits

• Top-of-market medical, dental, and vision coverage for you and your dependents.
• 401(k) with a top-of-market employer match.
• Unlimited PTO.
• Snacks, weekly team lunches, and dinner on Sela.
• Hybrid in-office schedule: four days a week together in San Francisco, with a flexible remote day on Wednesdays.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed