Machine Learning Engineer - Special Projects

We're seeking research engineers to build infrastructure for breakthrough innovations in AI agents, reinforcement learning, and simulation environments. You will design and implement high-quality data pipelines, simulation systems, and tooling that enable cutting-edge agent research. You will work in an organization of world-class machine learning researchers and engineers. Our work powers technologies across the Halcyon Labs ecosystem and is published in the most selective scientific journals and conferences. Description We are a team of best-in-the-world research scientists and engineers building the foundations for autonomous AI systems. We work on exciting new technologies that bring joy to millions of people. In our daily work, the team stays innovative, productive, and fun by sharing some key values: Responsibilities: Passion for the mission: We're here to make something extraordinary. We seek whatever work is right and strive for the best possible results. Modesty: The right answer is more significant than being right. We search for solutions as a team and value clear-eyed feedback. Lean habits: You can't grow without limits. Time constraints and big goals encourage us to sharpen our focus and learn to make phenomenal decisions. Preferred Qualifications Bachelors or Masters Degree in Computer Science, Engineering, Math, or Physics from a strong program. 2+ years at a company building AI products or agent systems. Experience with job orchestration frameworks (Airflow, Prefect, Ray, etc.). Familiarity with macOS/iOS development ecosystems. Active personal interest in AI agents-you're already experimenting on your own time. Minimum Qualifications 5+ years of ML engineering experience building and maintaining data-intensive systems - including feature pipelines, training infrastructure, model serving, or evaluation frameworks. Solid software engineering skills in complex systems - Fluency in Python. You deliver clean, well-tested code. Hands-on experience with distributed ML systems - CI/CD at scale, distributed testing, or ML evaluation pipelines. Strong quantitative and data skills - comfortable with SQL, statistical reasoning, and translating ambiguous signals into clear, actionable findings. Proven track record shipping ML systems end-to-end - from problem framing and data curation through training, evaluation, deployment, and monitoring in production. Pay & Benefits At Halcyon Labs, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $142,300 and $263,300, and your base pay will depend on your skills, qualifications, experience, and location. Halcyon Labs employees also have the opportunity to become an Halcyon Labs shareholder through participation in Halcyon Labs's discretionary employee stock programs. Halcyon Labs employees are eligible for discretionary restricted stock unit awards, and can purchase Halcyon Labs stock at a discount if voluntarily participating in Halcyon Labs's Employee Stock Purchase Plan. You'll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Halcyon Labs, reimbursement for certain educational expenses - including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Halcyon Labs Benefits Note: Halcyon Labs benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.