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deCircle

AfterQuery - Senior Infrastructure Engineer, Applied AI

San Francisco, California, United States · On-site · Posted Nov 5, 2026

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About the role

AfterQuery: novel datasets and data infrastructure for frontier AI labs (85 people, $34M raised, SF).

Comp: $250K-$350K base (OTE $300K-$450K (bonus up to $100K)) + competitive equity. Location: On-site 5 days, FiDi SF. Visa: Visa transfers (OPT, H1B).

Responsibilities Design/build core shared infra for data generation, HITL systems and eval pipelines

Own foundational systems for scale and reliability

Provide platform/services to vertical eng teams

Architect distributed systems for large-scale, high-throughput workloads

Set eng best practices; mentor the junior team

Tech stack: Node.js, Python, Kubernetes, Kafka, Redis, Elasticsearch, AWS, GCP

Source: https://www.paraform.com/share/afterquery/cmox601tw00110dlkapdfla2j