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HarperPosted 1 month ago

Platform Engineer

$140,000–$280,000 year

On-siteSan Francisco, California, United States

Full TimeAssociates DegreeMedium

Job Summary

Own core infrastructure for databases, AWS services, networking, and CI/CD systems supporting thousands of concurrent AI operations. Build observability that detects silent failures and orchestrate parallel agentic workloads with sub-second response times. Multiply developer velocity by creating tooling and abstractions that let product engineers ship in days. Own reliability end-to-end, including SLOs, on-call rotation, incident response, and post-mortems to prevent future fires. Work directly with founders and product engineers to design fixes before issues scale, leveraging AI in your code. Based in San Francisco with a Monday–Friday schedule starting very early.

Required Qualifications

  • Software engineering experience with a platform, infrastructure, or SRE focus
  • Proficiency in Python, TypeScript, Go, or similar
  • Production experience with cloud infrastructure (AWS), databases (Postgres), and observability tooling
  • Track record of building systems and tooling that other engineers depend on
  • Based in San Francisco or willing to relocate
  • Monday–Friday schedule
  • In-office five days a week
  • Very early morning start

Desired Qualifications

  • Experience orchestrating AI/ML workloads at scale (agent frameworks, LLM inference infrastructure)
  • Voice AI or real-time systems experience
  • Deep AWS experience (ECS, Lambda, RDS, VPC design)
  • Prior startup experience—especially at companies that scaled through hypergrowth
  • You've owned production systems at scale—not contributed to, owned; you got paged when they broke
  • You write code with AI (Cursor, Claude Code) and know how to leverage it for infrastructure work
  • You have depth across at least two of: databases, cloud infrastructure (AWS), networking, observability, or CI/CD
  • You've designed systems that survive real load—retries, DLQs, back pressure, idempotency, the whole stack
  • You care about developer experience—the tools other engineers use are as much your product as the customer-facing ones
  • You'd rather build the system that prevents the fire than firefight forever

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