← All roles

Senior Software Engineer - Security/Infrastructure

AfterQuery· Engineering
Apply on company site
San Francisco$200k - $350kFull-timePosted 4mo ago

About the role

Senior SWE focusing on security infrastructure and core systems for AI-related workflows, combining security engineering with building data and human-in-the-loop infrastructure. In-person role based in San Francisco.

Responsibilities

  • Build systems that identify and respond to real security events across our stack
  • Replace manual security workflows with programmatic, scalable solutions
  • Strengthen our cloud and production environments (GCP/AWS, containers, networking)
  • Design and enforce access control systems across internal teams, experts, and customers
  • Integrate security checks directly into development workflows without slowing shipping speed
  • Own incident handling systems and processes from detection through resolution
  • Secure surfaces unique to AI systems, including data flows and model interaction layers
  • Develop human-in-the-loop systems used in AI training and evaluation
  • Contribute to core infrastructure and internal tooling used across the company
  • Ship features across the stack that directly impact customers and model performance

Qualifications

  • You’ve built internal tools or systems to solve security problems—not just configured existing products
  • Strong programming ability in Python, Go, or TypeScript
  • Experience working with cloud environments (IAM, networking, containers)
  • Ability to identify vulnerabilities directly in code and system design
  • Experience creating or maintaining signal-based monitoring and alerting systems
  • Comfortable owning production issues when they arise
  • Able to move fluidly between security work and general engineering
  • 2-7 years building software or security systems

Skills

Required:Internal security tooling and engineeringPythonCloud environmentsSecurity monitoring and alertingIncident managementSecurity in AI data flows and model interactionsHuman-in-the-loop systems
Nice to have:GoTypeScript

Benefits

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

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
Company profileWebsite

More open roles at AfterQuery