Simulation Engineer

About this role

Aaru seeks a Simulation Engineer to transform AI research into production systems that simulate human behavior at scale. You'll build the core infrastructure, abstractions, and evaluation frameworks that power population simulations using LLMs and classical methods, working closely with researchers to ship fast, accurate, and cost-effective solutions.

What you'll do

• Productionize the simulation loop including audience generation, world modeling, and response prediction
• Design reusable abstractions like agent/population objects, simulation interfaces, and evaluation harnesses
• Build and maintain evaluation and accuracy measurement infrastructure
• Optimize simulations for speed and cost at scale
• Partner with simulation research to harden hybrid LLM and classical architectures
• Create workflows and tooling for client simulation deployment and analysis layers

What they're looking for

• Machine learning and AI systems development
• Large language models in production
• ML experimentation and rigorous evaluation design
• Full model lifecycle management (data, training, evaluation, deployment)
• Cross-functional collaboration with engineering and product teams
• Multi-agent systems and probabilistic modeling
• Python and software engineering best practices
• Simulation, Monte Carlo methods, or agent-based modeling

Benefits

• Competitive base salary and equity participation
• Comprehensive medical, vision, and dental coverage
• Visa sponsorship and relocation support
• In-person collaborative environment in NYC
• Work on frontier AI technology with direct impact
• Small, mission-driven team with ownership and autonomy