Machine Learning Engineer

About Poesis

Poesis is the AI-native investment manager pioneering a new foundation model for investing in U.S. equities. We're building modular AI systems to predict market movements and outperform legacy managers. This is frontier research with immediate real-world validation. Your work will directly shape investment decisions and portfolio performance.

Location & Workstyle

San Francisco Bay Area (near Stanford). Hybrid : several days on-site per week. Relocation available.

About the role

Poesis is building an AI-driven hedge fund focused on reshaping how trading decisions are made. We’re hiring our Founding ML Engineer, the first full-time machine learning hire who will turn research and data into production models.

You’ll build the first ML pipelines end-to-end — from ingesting and cleaning data, to model training, validation, and signal generation. This is a deeply hands-on, execution-oriented role for someone who can write code, design experiments, and deliver validated results quickly.

You’ll work directly with the CEO, CFO, and Chief Scientist, owning both implementation and iteration. Over time, you’ll help scale the system into a full production platform and define best practices for future hires.

Responsibilities

• Architect, build, and maintain the core ML infrastructure for Poesis’ investment platform.
• Develop reproducible pipelines for data ingestion, feature generation, and model training.
• Implement backtesting and evaluation frameworks with clear performance metrics.
• Deliver regular, documented reports on model accuracy, feature importance, and portfolio-level impact.
• Collaborate closely with the Chief Scientist to refine model hypotheses and production readiness.
• Maintain code quality : version control, testing, reproducibility, and documentation.
• Build robust backtesting frameworks and model validation tools with walk-forward evaluation and risk controls.
• Integrate with professional financial data providers (Bloomberg, FactSet, Refinitiv, CapIQ).
• Establish foundational MLOps practices : model versioning, CI / CD, monitoring, and documentation.
• Define and iterate on “demo-able” workflows that connect model outputs to investment decision-makers.

Required Competencies

Preferred Competencies

Profile

Current legal authorization to work in the US required; visa sponsorship considered later for full-time employees.

Benefits : High quality dental, vision, and health care fully covered.

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