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Mirendil

Member of Technical Staff, Post-Training, RL Infra

San Francisco, California, United States

Location
San Francisco, California, United States
Work
On-site
Employment
Full-time
Level
Lead / staff
Function
Engineering
Pay
$300K – $400K a year (read from the ad)
Posted
4 months ago

About the role

Mirendil

Mirendil is a tech-first company focused on solving core bottlenecks that unlock step-change acceleration across science and technology. Our first goal is to democratize frontier AI R&D across scientific disciplines. We are building a frontier AI research company and training our own models end-to-end.

The Role

We are looking for engineers to help build the post-training stack for frontier reasoning models. This role sits at the intersection of research and infrastructure. You will work to push the scale of our RL stack, whether it is novel recipe ideas, reliability, or performance. Some example areas you might work on (not limited to):

  • Design and build reliable infrastructure for large-scale RL training
  • Implement novel performance optimizations across the training stack
  • Develop evaluation and benchmarking infrastructure to measure model progress, throughput, and uptime
  • Build data collection and feedback pipelines that close the loop between human signal, reward modeling, and training
  • Collaborate with multiple teams to rapidly iterate on RL algorithms and get experiments into production training runs

If you're excited about building the infrastructure that makes frontier RL research possible at scale, we'd love to hear from you.

We offer a base salary of $300,000–$400,000 USD and a meaningful equity grant, depending on experience and background, along with competitive benefits.

Source

Posted by Mirendil on their own hiring page, jobs.ashbyhq.com. OptiTalent shows it as published, read 07 Nov 2026 00:37 UTC; the original is the reference.

View the original ad ↗

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