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About the Role

Central AI sits within Millennium’s Information Technology organization, where flexible, scalable technology and advanced proprietary systems are core to the health and growth of the business. The Central AI team carries a broad mandate to bring AI to every function that runs the firm, spanning business development, alpha capture, execution services, risk management, finance, operations and middle office, legal, compliance, and recruiting. In this seat, you’ll rapidly deploy agents and provide analysis on edge cases.

Responsibilities

Own agentic process automation: reverse-engineer manual, undocumented workflows and build agents that execute them reliably, including tool integrations, orchestration, human-in-the-loop checkpoints, state management, and auditability.
Build prediction and decision-support models: forecasting, anomaly detection, ranking, matching, and classification over years of accumulated firm data, with proper validation and monitoring.
Develop document intelligence pipelines for extraction, classification, and review across contracts, filings, emails, and transcripts.
Build entity intelligence and self-improving systems, including knowledge graphs, entity resolution, enrichment pipelines, and eval/feedback loops that improve deployed systems over time.
Embed directly with business teams to scope problems end-to-end, owning everything from the initial conversation through architecture, deployment, evaluation, and iteration.
Turn proven solutions into reusable capabilities for the broader firm.

Requirements

3+ years shipping production software, ML, or AI systems (flexible for exceptional builders; what you’ve shipped matters more than years served).
Bachelor’s degree in Computer Science, Engineering, Mathematics, Physics, or a related quantitative discipline.
Strong Python and engineering fundamentals; your prototypes become products others build on.
Substantial hands-on LLM and agentic experience: tool use, orchestration, structured outputs, retrieval, evals, and calibrated judgment about what agents can reliably do.
Supervised ML depth: training, validation, feature engineering, and awareness of pitfalls like leakage, overfitting, and drift.
Comfort with messy, heterogeneous data and unfamiliar domains, with the ability to become functionally fluent within days and earn credibility with subject-matter experts.
The autonomy to embed with a trader’s team or a CFO’s team, understand their world, and build without waiting for a spec.

Skills

Python
LLM
Agentic experience
Tool use
Orchestration
Structured outputs
Retrieval
Evals
Supervised ML
Training
Validation
Feature engineering
Engineering fundamentals

Location

New York

Work Type

Full-time

Experience Level

3+ years

Education Level

Bachelor’s degree in Computer Science, Engineering, Mathematics, Physics, or a related quantitative discipline

Salary/Compensations

$175,000 to $250,000

Benefits

Discretionary performance bonus
Comprehensive benefits

About the Company

Millennium is a global, diversified alternative investment firm, founded in 1989.
Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.
Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning.
With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time.
Discover how transformative growth accelerates impact.