Platform Engineer, RL Environments & Frontier Labs

Foundr, LLC; San Francisco (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Foundr, LLC is hiring a Member of Technical Staff - Platform Engineering to own the platform and lead RL environment frontier labs that train agents on investment banking, private equity, and hedge fund work. You will shape the platform, train agents, and grow the team around it.

You will build scalable RL training/inference infrastructure, deliver long-horizon environments, and craft verifiers for quantitative decks and models while shaping engineering culture from day one.

Qualifications

• Has built evals, benchmarks or RL environments for AI agents.
• Demonstrates startup-speed delivery and iteration.
• Strong product ownership with ability to prioritize a large roadmap.
• Comfortable working with customers, users and subject-matter experts.
• Bonus: research background or founder/early-stage experience.

Responsibilities

• Own RL environment training and inference infrastructure at scale.
• Research and deliver long-horizon environments for frontier models.
• Develop domain-specific verifiers for decks, Excel models and trading.
• Build tooling, synthetic data pipelines, and analytics to raise throughput.
• Set engineering culture and practices from day one.

Skills

RL environment development

Product ownership

Customer-facing collaboration

Tools

RL frameworks

Job description

Foundr, LLC is hiring a Member of Technical Staff - Platform Engineering to own the platform and lead RL environment frontier labs that train agents on investment banking, private equity, and hedge fund work. You will shape the platform, train agents, and grow the team around it.

You will build scalable RL training/inference infrastructure, deliver long-horizon environments, and craft verifiers for quantitative decks and models while shaping engineering culture from day one.