Senior Machine Learning Engineer, Vector Bidding Science

Lead Unity’s Vector Bidding Science work by defining technical direction and building scalable AI-powered bidding and pacing systems for real-time ad auctions.

Responsibilities

• Design, implement, and optimize core bidding algorithms and auction mechanisms
• Architect and scale bid landscape forecasting capabilities
• Analyze large-scale marketplace dynamics to extract insights and drive algorithmic improvements
• Validate models through offline evaluations and online A/B testing to prove measurable business impact
• Collaborate cross-functionally with product, infrastructure, and engineering teams

Requirements

• Hands-on experience with state-of-the-art machine learning, including reinforcement learning and control theory, applied to real-world bidding or pricing problems
• Strong software engineering skills in Python; experience with deep learning frameworks, preferably PyTorch
• Strong understanding of metric design, online experimentation frameworks (A/B testing), and large-scale data analysis
• Proven ability to lead projects end-to-end and deliver measurable business impact in an ambiguous technical environment

Technologies

• Python
• PyTorch
• A/B testing
• Spark
• Ray
• BigQuery
• Flink

Benefits

• Comprehensive health, life, and disability insurance
• Commute subsidy
• Employee stock ownership
• Competitive retirement/pension plans
• Generous vacation and personal days
• Support for new parents through leave and family-care programs
• Office food snacks
• Mental Health and Wellbeing programs and support
• Employee Resource Groups
• Global Employee Assistance Program
• Training and development programs
• Volunteering and donation matching program

You Might Also Have

• Experience working with large datasets and distributed computing frameworks such as Spark, Ray, BigQuery, or Flink
• Experience building real-time ad systems, including DSP bidding logic, survival analysis for market price estimation, or game-theoretic modeling
• Experience using AI tools (such as Claude Code, GitHub Copilot, and Cursor) to accelerate development

Compensation and Location

• Location: Mountain View, CA (onsite)
• Salary (base): USD 148,700 - 244,600 per year
• Zone A: $188,200 - $244,600 USD
• Zone B: $167,200 - $217,300 USD
• Zone C: $148,700 - $193,300 USD
• Range reflects anticipated base salary; role may also be eligible for equity awards and participation in company incentive plans (such as annual discretionary bonuses or sales commissions)
• Final offer depends on geographic location and the candidate’s relevant experience, professional background, and skill set