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Software Engineer - Platform Infrastructure

AfterQuery· Engineering
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San Francisco$250k - $350kFull-timePosted 5mo ago

About the role

Design and build core platform infrastructure powering data generation, evaluation, and agentic systems. Own scalable, reliable, high-throughput systems and APIs for researchers and product engineers, with strong observability and long-term architecture planning.

Responsibilities

  • Architect and develop the shared infrastructure powering data generation platforms, human-in-the-loop systems, and evaluation pipelines
  • Build systems capable of processing large-scale datasets and high-throughput workloads with strong reliability guarantees
  • Create reusable infrastructure and APIs that enable product engineers and researchers to build quickly and reliably on top of core systems
  • Design systems with strong observability, monitoring, and fault tolerance to support production workloads at scale
  • Help define long-term system architecture across data pipelines, compute infrastructure, task orchestration, and storage systems
  • Work closely with engineers and researchers to support new AI experimentation workflows and platform capabilities
  • Define standards for system design, deployment, reliability, and infrastructure operations

Qualifications

  • Strong experience building production distributed systems or platform infrastructure
  • Proficiency in Python and/or JavaScript (Node.js / Next.js) or similar backend technologies
  • Experience designing and operating systems in cloud environments (GCP or AWS)
  • Experience with message queues and event-driven systems (Kafka, RabbitMQ, Pub/Sub, etc.)
  • Experience working with high-throughput data pipelines and asynchronous processing systems
  • Strong understanding of system scalability, performance, and reliability
  • Experience owning systems running in production environments

Skills

Required:Distributed systemsPythonJavaScript / Node.js / Next.jsCloud platformsMessage queuesData pipelinesReliability & scalability

Benefits

  • Health Insurance: Medical, Vision, Dental
  • 401(k) with Employer Match
  • Daily Meals: Daily UberEats Stipend
  • Monthly Wellness Stipend
  • Commute Covered
Last updated Sep 30, 2026. Interested? Apply on the company site.
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About AfterQuery

AfterQuery is an applied research lab curating data solutions to accelerate foundation model development.

AI researchdata solutionsfoundation model developmenttraining datasupervised fine-tuningreinforcement learningagent environmentscomputer use trajectories
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