Senior Machine Learning Engineer, Vector Bidding Science

The opportunity

We are looking for Senior Machine Learning Engineers to join our Vector Bidding Science team. In this role, you will define the technical vision and architect the next generation of scalable real‑time bidding systems powered by cutting‑edge AI, marketplace intelligence, and advanced optimization frameworks.

As a key member of the Vector AI org, you will play a pivotal role in advancing Unity’s high‑scale ads engine. By harnessing massive datasets and rich signals, you will develop state‑of‑the‑art bidding and pacing algorithms that automatically maximize advertisers’ returns.

• Design, implement, and optimize core bidding algorithms and auction mechanisms
• Architect and scale bid landscape forecasting capabilities
• Analyze large‑scale marketplace dynamics to uncover deep insights and deliver algorithmic improvements
• Drive offline evaluations and online A/B experiments to validate model performance and deliver measurable business impact
• Collaborate cross‑functionally with product, infrastructure, and engineering teams

• Hands‑on experience on state‑of‑the‑art machine learning, reinforcement learning, and control theory to complex, real‑world bidding or pricing problems
• Strong software engineering skills in Python and experience with deep learning frameworks, preferably Py Torch
• Solid 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 landscape

• Experience working with large datasets and distributed computing frameworks (e.g., Spark, Ray, Big Query, Flink)
• Experience building real‑time ad systems, specifically in DSP bidding logic, survival analysis for market price estimation, or game‑theoretic modeling
• Experience leveraging AI tools (such as Claude Code, Git Hub Copilot, and Cursor) to accelerate development

• Relocation support is not available for this position

At Unity, we want our team members to thrive. We offer a wide range of benefits designed to support well‑being and work‑life balance.

Please note:

Benefits eligibility, specific offerings, and coverage vary based on the country and employment status.

While specific benefits vary, here are some of the ways we strive to take care of our eligible team members globally:
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

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.