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Member of Technical Staff — Reliability-CI Infrastructure

RadixArk· Member of Technical Staff
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Palo Alto, CA$200k - $400kfull-timePosted 5mo ago

About the role

Role focused on owning and architecting RadixArk's CI/Infrastructure for SGLang, enhancing reliability, speed, and security of CI workflows across multiple GPU hardware pools and open-source LLM inference engines.

Responsibilities

  • Own CI reliability end-to-end — triage failures, distinguish real regressions from flaky tests and infra issues, keep main green
  • Build regression-based CI — replace hardcoded static thresholds with automated baseline comparison (metrics pipeline, durable storage, detection logic)
  • Harden runner infrastructure — ephemeral runners, container isolation, security hardening for fork PR execution
  • Cut CI time — right-size eval suites, deduplicate server startups, separate PR smoke tests from nightly full runs
  • Improve developer experience — faster feedback, clearer failure messages, workflow orchestration

Qualifications

  • 3+ years operating CI/CD at scale (GitHub Actions, Buildkite, Jenkins, GitLab CI, or similar)
  • Deep Linux, Docker, GPU computing knowledge
  • Self-hosted runner management experience
  • Strong Bash and Python
  • Security mindset — CI supply chain risks, fork PR attack vectors, runner hardening
  • NVIDIA GPU drivers, CUDA, NCCL, InfiniBand/RDMA experience in CI contexts
  • Familiarity with ML inference workloads (model loading, KV cache, quantization)

Skills

Required:CI/CD at scaleLinuxDockerPythonBashSecurity

Benefits

  • Compensation details provided in job description: $200,000 - $400,000 USD per year + equity
Last updated Aug 18, 2026. Interested? Apply on the company site.
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About RadixArk

SHIP AI FOR ALL

RadixArk is an infrastructure-first, deep-tech company building large-scale inference and training systems for the entire AI community.

AI systemsMilesSGLangbessemer-ai-infrastructure-2026inferenceinference-inflection-pointinfrastructureopen infrastructure
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