Member of Technical Staff - Platform Engineering

About Halluminate

Halluminate is an applied AI and data company building computer-use and tool-use RL gyms to train AI agents on real financial services work — Excel modeling, pitch decks, and everything investment banking, private equity, and hedge funds rely on. We work with frontier labs, graduated from Y Combinator (S25), and raised a seed round to scale the team.

The role Base: $200–275k · Equity: 0.15–0.30% · Location: San Francisco, 5 days in office Own platform engineering, develop frontier long-horizon RL environments, and help build our engineering org from the ground up.

Responsibilities

• Build our RL environment training and inference infrastructure to support customer usage at scale.
• Research and develop next-generation RL environments — increasingly realistic, long-horizon, and difficult for frontier models.
• Build software that 10–100x's the quality and throughput of RL environment creation.
• Innovate on synthetic data pipelines to create realistic problems.
• Build platform analytics for environment cost, hours, bottlenecks, and SME management.
• Craft domain-specific verifiers (verifiable rewards for decks, Excel modeling, quantitative trading, and beyond).
• Establish engineering culture and practices from the ground up.
• You should have Familiarity building evaluations, benchmarks, or RL for AI agents.
• Startup speed: iterate quick, ask quick, respond quick, make mistakes quick.
• Strong product and user ownership; ability to prioritize across a large roadmap.
• Client-facing comfort — you'll talk to users, customers, and SMEs.
• Nice to have Research background (training models, publishing papers).
• Former founders or experience at early-stage startups.

What we offer

• Healthcare — Fully covered medical, dental, and vision for you.
• Subsidized for dependents.
• Relocation — $10k+ relocation stipend to help you get to San Francisco. 401(k) — Up to 4% employer match.
• Food — Free breakfast, lunch, and dinner while working.
• Health — Free gym membership.
• Transportation — Free Ubers and Waymo rides to and from the office.
• Visa sponsorship — We sponsor visas, including H-1B.