Senior Machine Learning Engineer, Advertiser Growth

Unity Technologies • New York, NY

9d

About The Position

The Advertiser Growth team at Unity is responsible for building a world-class ad-tech ecosystem. This role is crucial for ensuring that as the marketplace expands, advertisers have the intelligent tools, robust infrastructure, and rigorous experimentation frameworks needed to scale their impact. The roadmap for 2026 is defined by three pillars: Foundation, Smart, and Intelligence. This position offers technical breadth, operating at the intersection of financial execution, creative innovation, and marketplace science. The engineer will architect GenAI systems for high-performing creatives, design pacing algorithms for multi-million dollar budgets, ensure billing pipelines handle massive scale with zero-fault tolerance, and build experimentation infrastructure to scientifically evolve the marketplace. This is a high-stakes role where technical leadership directly impacts Unity’s financial integrity and the long-term growth of the ecosystem.

Requirements

• Advanced degree in computer science or relevant engineering-related field or equivalent experience.
• 8+ years of software engineering experience, including 5+ years working on ads delivery systems.
• Extensive experience building and operating large-scale, low-latency backend systems using languages like Java, Go, or Scala.
• Deep familiarity with building or maintaining budget control systems, feedback loops, or spend-prediction algorithms.
• Proven experience building or scaling experimentation platforms, with a deep understanding of variance reduction, interference/network effects, and metric design in a marketplace context.
• A track record of working on "mission-critical" pipelines (like billing, payments, or clearinghouses) where data precision, idempotency, and fault tolerance are paramount.
• Experience or strong technical interest in building the backend workflows required to serve, scale, and store Generative AI models for creative asset generation.
• Proficiency with real-time stream processing (Kafka, Flink, or Spark) specifically applied to event-based charging and real-time performance feedback.
• A proven ability to lead complex, multi-quarter technical roadmaps and mentor senior engineers in a high-growth environment.

Responsibilities

• Design and optimize sophisticated pacing controllers (PID, probabilistic forecasting) to smooth advertiser spend across diverse time zones and traffic spikes, ensuring optimal delivery and marketplace stability.
• Lead the backend integration of Generative AI models (Diffusion, LLMs) to automate the creation of high-performing image and video assets tailored to specific campaign goals and formats.
• Build and scale the infrastructure for high-velocity experimentation, including A/B testing, switchback tests, and long-term holdouts to measure the impact of marketplace changes on advertiser ROI and platform health.
• Architect and maintain high-throughput billing pipelines that process billions of events with 100% accuracy, bridging the gap between real-time ad delivery and mission-critical financial reconciliation.
• Analyze complex financial and marketplace datasets to refine the trade-off between spend velocity and advertiser performance, using experimentation results to tune pacing and billing logic.

Benefits

• Relocation support is not available for this position
• Unity is an equal opportunity employer committed to fostering an inclusive, innovative environment with the best employees. Therefore, we provide employment opportunities without regard to age, race, color, ancestry, national origin, disability, gender, or any other protected status in accordance with applicable law.
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• 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.
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What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree