Senior Machine Learning Engineer, Advertiser Growth

Unity South APAC (SEA, ANZ, IND Subcont.); Mountain View (CA); On-site; USD 148,700 - 248,400; Full time

Job summary

Unity South APAC is looking for an experienced software engineer to enhance its ad-tech ecosystem. This role involves designing and optimising pacing controllers, integrating Generative AI models, and building robust infrastructure for experimentation.

With a focus on reliability and precision, successful candidates will have a strong backend systems background, ideally in ad delivery. The position includes a salary range of $148,700 to $248,400 USD and aims to support a diverse and inclusive workplace.

Qualifications

• 6+ years of software engineering experience, including 3+ years in ads delivery systems.
• Experience with large-scale, low-latency backend systems.
• Familiarity with budget control systems, feedback loops, or spend-prediction algorithms.
• Ability to lead complex, multi-quarter technical roadmaps.

Responsibilities

• Design and optimise pacing controllers for diverse time zones.
• Lead backend integration of Generative AI models.
• Build infrastructure for high-velocity experimentation.
• Architect and maintain billing pipelines for ad delivery.
• Analyze financial and marketplace datasets to refine performance.

Skills

Software engineering

Backend systems

Java

Go

Scala

Kafka

Flink

Spark

AI integration

Data analysis

Education

Advanced degree in computer science or relevant engineering-related field

Job description

Overview

At Unity, we are building a world‑class ad‑tech ecosystem that connects billions of users with the creators and experiences they love. The Advertiser Growth team is the engine of this mission, ensuring that as our marketplace expands, advertisers have the intelligent tools, robust infrastructure, and rigorous experimentation frameworks needed to scale their impact.

What you'll be doing

• Design and optimise 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.

What we're looking for

• Advanced degree in computer science or relevant engineering‑related field or equivalent experience.
• 6+ years of software engineering experience, including 3+ 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.

You might also have

• Experience embracing AI as a strategic advantage in engineering, following established best practices for code quality and security.

Additional Information

• Relocation support is not available for this position.

Salary

Note: This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). Gross pay salary $148,700—$248,400 USD.

Equal Opportunity Statement

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. This position requires the incumbent to have sufficient knowledge of English for 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.