Sr. Machine Learning Engineer

ironSource; Mountain View (WY); On-site; USD 140,000 - 232,000; Full time

Benefits offered by this job

Comprehensive health insurance

Employee stock ownership

Generous vacation and personal days

Job summary

Unity's ML Engineering Infrastructure team builds the platform that powers machine learning across the company, from feature generation and training data pipelines to distributed training, experimentation, and model serving. We're looking for a Machine Learning Engineer to help build the platform behind our product intelligence, production ML models, and the teams that develop them.

You will operate at scale across batch and streaming data, and collaborate with engineers across the org to

Qualifications

• Experience building ML infrastructure, data platforms, or distributed systems in production.
• Strong Python skills and experience working with data-intensive workloads.
• Hands-on experience with ML frameworks (e.g., PyTorch) and distributed compute (e.g., Ray, Spark)
• Experience with data pipelines, model training workflows, or large datasets beyond academic settings
• Comfortable working across several layers of the ML stack, with a track record of learning new tools and systems quickly
• Ability to spot patterns in ambiguous or inconsistent problems and translate them into practical technical needs
• Clear communication and a collaborative approach with peers, managers, and partner teams
• Bachelor's degree in Computer Science, Machine Learning, Systems, or a related field, or equivalent practical experience

Responsibilities

• Build and maintain data and feature pipelines that generate training datasets for ML models and experimentation
• Develop and improve infrastructure for distributed training workflows
• Build and operate multi-stage ML pipelines using workflow orchestration tools
• Contribute to model serving and deployment infrastructure, helping models move reliably from training into production
• Improve reproducibility and reliability across the stack through monitoring, alerting, dataset validation, and testing
• Take on projects scoped with your manager and carry them through end-to-end, from design to rollout, using your own judgment along the way
• Investigate uncommon or inconsistent issues across pipelines and training systems, recognize patterns, and turn them into concrete improvements
• Keep both the hands-on details and the bigger picture in mind, delivering on immediate needs while moving the platform in the right direction
• Partner with ML engineers, researchers, and peers across teams, and share progress and tradeoffs with managers and directors
• Pick up new tools and new parts of the stack as team priorities shift

Skills

Python

PyTorch

Ray

Spark

Data pipelines

Distributed systems

Education

Bachelor's degree in Computer Science, Machine Learning, Systems, or related field

Tools

Kubernetes

Prometheus

Grafana

Airflow

Prefect

Triton

KServe

Ray Serve

Kafka

Job description

The opportunity

Unity's ML Engineering Infrastructure team builds the platform that powers machine learning across the company, from feature generation and training data pipelines to distributed training, experimentation, and model serving.

We're looking for a Machine Learning Engineer to help build the platform behind our product intelligence, production ML models, and the teams that develop them. Operating at scale across batch and streaming data, our systems power large-scale training, feature generation, and experimentation. You'll work across the full ML infrastructure stack, from data and feature pipelines to distributed training, orchestration, serving, and observability, going wherever the team needs you most. This role suits someone curious and eager to learn who picks up new tools quickly.

Working closely with your manager and experienced engineers, you'll take on well-scoped projects and deliver them end-to-end using your own judgment, keeping both the day-to-day details and the broader direction of the platform in view.

What you'll be doing

• Build and maintain data and feature pipelines that generate training datasets for machine learning models and experimentation
• Develop and improve infrastructure for distributed training workflows
• Build and operate multi-stage ML pipelines using workflow orchestration tools
• Contribute to model serving and deployment infrastructure, helping models move reliably from training into production
• Improve reproducibility and reliability across the stack through monitoring, alerting, dataset validation, and testing
• Take on projects scoped with your manager and carry them through end-to-end, from design to rollout, using your own judgment along the way
• Investigate uncommon or inconsistent issues across pipelines and training systems, recognize the patterns behind them, and turn them into concrete improvements
• Keep both the hands-on details and the bigger picture in mind, delivering on immediate needs while moving the platform in the right direction
• Partner with ML engineers, researchers, and peers across teams, and share progress and tradeoffs with managers and directors
• Pick up new tools and new parts of the stack as team priorities shift

What we're looking for

• Experience building ML infrastructure, data platforms, or distributed systems in production
• Strong Python skills and experience working with data-intensive workloads
• Hands-on experience with ML frameworks (e.g., PyTorch) and distributed compute (e.g., Ray, Spark)
• Experience with data pipelines, model training workflows, or large datasets beyond academic settings
• Comfortable working across several layers of the ML stack, with a track record of learning new tools and systems quickly
• Ability to spot patterns in ambiguous or inconsistent problems and translate them into practical technical needs
• Clear communication and a collaborative approach with peers, managers, and partner teams
• Bachelor's degree in Computer Science, Machine Learning, Systems, or a related field, or equivalent practical experience

Nice to Have

• Experience with Kubernetes and cloud infrastructure (GCP or AWS)
• Experience with observability tooling (e.g., Prometheus, Grafana)
• Experience with workflow orchestration systems (Airflow, Prefect, etc.)
• Experience with model serving frameworks (e.g., Triton, KServe, Ray Serve)
• Exposure to large-scale data platforms (data lakes, warehouses, streaming systems such as Kafka)
• Familiarity with feature stores or experimentation platforms

Additional Information

Zone A: $178,700 - $232,300

Zone B: $159,100 - $206,800

Zone C: $140,700 - $182,900

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). The final offer amount will depend on several factors, including geographic location and the candidate’s relevant experience, professional background, and skill set.

Benefits

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

Life at Unity

Unity [NYSE: U] is the world’s leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please visit www.unity.com .

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. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

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.

This posting is intended to fill an existing vacancy, and we are committed to providing applicants with updates throughout the hiring process in accordance with applicable law.