Research Systems Engineer (AI)

Location: San Francisco, California; on-site at the Mission office

Salary: $190,000–$310,000 annual base salary, plus equity and benefits

Company

hirify.global builds continual-learning infrastructure that helps enterprises train proprietary-data models and deploy improving AI agents.

What you will do

• Post-train frontier-scale language models on enterprise tasks and environments.
• Explore and develop reinforcement-learning techniques while co-designing algorithms and systems.
• Contribute to Alchemy, a data research program for generating signal-rich training environments from production data.
• Build high-performance internal tools for probing, debugging, and analyzing training runs.
• Partner with infrastructure engineers to scale training and inference efficiently on GPUs.

Requirements

• Experience training or serving large language models.
• Experience building reinforcement-learning environments and evaluations for language models.
• Proficiency in PyTorch, JAX, or similar machine-learning frameworks.
• Experience with distributed training.
• Strong experimental design skills.

Nice to have

• Background in pre-training or post-training research.
• Experience with high-performance computing environments or large-scale clusters.
• Contributions to open-source ML research or infrastructure.
• Published research, open-source contributions, or technically creative side projects.

Culture & Benefits

• Research, product, and applied AI work closely together on enterprise AI systems.
• Competitive compensation and equity.
• 100% employer-paid health insurance.
• Unlimited PTO and paid parental leave.
• Daily lunches and dinners, retirement plans, and transportation support.
• Relocation support and visa sponsorship.