Site Reliability Engineer Post Training

Artificial-intelligence research and product company building customizable AI systems, including the Tinker training API and Inkling open-weight models.

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About Thinking Machines Lab

Thinking Machines Lab develops AI products that let researchers and developers fine-tune and use models, while also releasing open-weight multimodal models.

View jobs by Thinking Machines Lab

Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will own the reliability, performance, and uptime of large-scale post-training and reinforcement-learning jobs. You will support active model runs, debug full-stack failures, build monitoring and recovery automation, improve checkpointing and scheduling, reduce operational toil, join on-call rotations, and write postmortems.

Requirements

  • 4+ years of experience as a production engineer, site reliability engineer, or infrastructure engineer operating large-scale distributed systems in production
  • Experience debugging complex distributed-system failures
  • Software engineering skills in Python, Go, or C++
  • Knowledge of Linux systems internals and networking fundamentals
  • Experience owning production systems and participating in on-call rotations

Responsibilities

  • Own reliability, performance, and uptime for large-scale post-training and reinforcement-learning jobs
  • Partner with research teams during active model runs
  • Debug failures across accelerators, networking, storage, schedulers, and training frameworks
  • Build monitoring, alerting, and automated recovery
  • Improve checkpointing, fault tolerance, and job scheduling
  • Build internal tools that reduce toil and improve cluster utilization
  • Participate in an on-call rotation
  • Write postmortems and implement permanent fixes for recurring failures

Benefits

  • Visa sponsorship
  • Health benefits
  • Dental benefits
  • Vision benefits
  • Unlimited PTO
  • Paid parental leave
  • Relocation support