Unity Principal Software Engineer - Data ML 

United States, California, San Francisco 

309774447

We’re looking for a Principal Data Engineer with deep expertise in machine learning infrastructure to help shape the data systems behind our next generation of ML-driven products, including ads optimization and personalization. This is a high-impact role where you’ll design scalable pipelines, mentor other engineers, and partner closely with product and data science to turn ambitious ideas into production-ready systems.

• Design, build, and optimize real-time and batch data pipelines tailored for ML workflows.
• Partner with data scientists, product managers, and engineers to translate business goals into scalable data models and algorithms.
• Architect and maintain robust data infrastructure for ingestion, storage, processing, and serving ML-ready datasets.
• Lead technical initiatives, define best practices, and mentor engineers across teams.
• Ensure data security, privacy, and compliance across all ML and AdTech systems.

• Robust experience in data engineering or ML infrastructure, ideally in large-scale or AdTech environments.
• Strong skills in Python, Scala, or Java; experience with Spark, Flink, Kafka, and distributed systems.
• Cloud experience, preferably GCP (AWS acceptable).
• Familiarity with ML frameworks like TensorFlow or PyTorch and deploying models at scale.
• Proven track record of technical leadership and cross-functional collaboration.

• Experience translating ML research into scalable production systems.
• Knowledge of MLOps practices—model deployment, monitoring, and experimentation frameworks.
• Ability to communicate technical concepts to both technical and non-technical stakeholders.

• Relocation support is not available for this position.

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

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.