Senior Backend Engineer, Agent Infrastructure (AI Startup)
ScrumAID
San Francisco, CA · Posted November 1, 2026
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November 2026
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Pay compared with the market
This listing does not state pay. Across 38 open senior backend engineer listings that state pay, the middle half runs $191,500 to $223,000 and the median is $205,000.
Listed pay is what employers advertise, not what people are paid.
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Skills this job asks for
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About the job
A fast-growing startup building infrastructure for AI agents wants a senior, backend-leaning engineer who can run projects start to finish and eventually take on wider technical leadership. Demand from enterprise buyers currently outpaces engineering capacity, so this hire will have real influence on how the team scales.
Your focus
Design and build foundational agent components such as sandboxes, an LLM routing layer, evaluation tooling, memory and observability
Deliver them as self-contained deployments running on bare metal for government, banking and large enterprise customers
Take projects from design choices all the way to live systems, working entirely independently
Serve as a technical lead: set direction, coach colleagues and contribute to team growth
Work directly with customers to clear blockers in their deployments
What you bring
Five to ten years as a full stack engineer, with proven zero-to-one ownership at a startup or a large technology company
Strong Python and TypeScript with Next.js
Deep knowledge of Kubernetes, Helm and Docker
Willingness and ability to lead engineers and manage people
A BS in computer science or a related STEM field
Plus: direct experience with agents, LLMs, evals, sandboxing or observability, and prior tech-lead experience
On-site in the San Francisco Bay Area, five days a week. Visa transfers and new visa sponsorship are both possible.