Platform Engineer

Sable; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

Sable is hiring an Infrastructure Engineer to own the core platform that powers Aidan. You will work in a live product environment, ensuring provisioning, streaming performance, and cost per session while upholding enterprise-grade security and reliability.

You will partner with engineers and deployment teams to build self-service platforms and scalable pathways for environment spinning, configuration, and operation, enabling thousands of concurrent sessions as adoption grows.

Qualifications

• Experience with infrastructure and distributed systems.
• Strong on cloud platforms and cost-conscious design.
• Ability to build self-service platforms for engineering teams.

Responsibilities

• Own infrastructure and end-to-end platform reliability.
• Maintain security and isolation guardrails for enterprise use.
• Ensure observability with SLOs and proactive incident response.
• Scale browser-based product use with high reliability as volume grows.

Skills

Kubernetes

DevOps

Real-time streaming

Distributed systems

Cost engineering

Product mindset

Tools

Terraform

CI/CD pipelines

Monitoring tools

Job description

About Sable

Sable built Aidan, the first AI employee who can lead customer calls using realtime voice, vision, and browser use. Aidan runs a live, two-way conversation inside a real product environment, clicking through the product like a human, watching the user's screen, and adapting the journey on the fly. Every conversation feeds a self-improving context graph we call the Brain, so Aidan gets smarter with each call.

The role

You build the foundation upon which Sable's product exists. Every session runs on a real product environment in realtime, with an AI employee and a human sharing control. You own that system end to end: provisioning, streaming performance, cost per session, and the security standards that lets customers trust us with their products. You\'ll treat our engineers and deployment team as your customers, building the self-service platform and paved paths that let them spin up, configure, and operate environments without waiting on anyone. This is a role of extraordinary leverage: routinely supporting thousands of sessions, and as our volume grows with usage-based pricing, this infrastructure is both critical to margin and the user experience. You will be measured on the things that matter most: reliability, security, data handling, and uptime.

What you\'ll do

• Build upon and grow the infrastructure that all engineers, the deployment team, and the product depend on

• Own security and isolation guardrails, data-handling standards, and implement enterprise-level best practices

• Own reliability and observability across every product surface: SLOs, incident response, and the instrumentation that flags any issues before the customer does

• Allow us to scale browser use with optimal reliability as volume grows

Who you are

• Experience in infrastructure and distributed-systems: container orchestration (Kubernetes), cloud cost engineering, realtime streaming systems, and DevOps

• You bring a product mindset to internal platforms: your customers are the engineers and deployment team who build on your work, and their adoption and feedback is one of the ways of how you judge success

• Excited to be the first dedicated owner of infrastructure, and to build the leverage that lets a small team operate like an enterprise