Machine Learning Engineer (Ad Sciences)

Location: San Mateo, California, United States

Salary: $172,500–$210,000 USD annual base salary for California and New York offices; final compensation varies by location and region.

Company

hirify.global is a global advertising technology company using AI, machine learning, and privacy-first data to connect brands, publishers, and consumers at large scale.

What you will do

• Build and support training pipelines and machine learning model implementations to accelerate experimentation.
• Adapt open-source LLM infrastructure, including DeepSpeed and OpenRLHF, for post-training requirements.
• Optimize online and batch inference for low latency and cost efficiency.
• Build monitoring and evaluation systems for reliable infrastructure and model quality.
• Improve data pipelines and training and inference features using data from across the product portfolio.
• Explore accelerator platforms such as JAX on TPUs and collaborate with Applied Scientists on experiment design and modeling.

Requirements

• Master’s degree in machine learning or a related field.
• At least 3 years of experience building large-scale machine learning or deep learning systems.
• Expertise in distributed data systems, relational and key-value stores, Airflow, and Spark.
• Expertise in Python and PyTorch or a similar ecosystem.
• Experience with Triton, ONNX, TensorRT, cloud platforms, and Kubernetes.
• Role location: San Mateo, California, United States.

Nice to have

• PhD in machine learning or a related field.
• Java experience, particularly with high-performance serving systems.
• Knowledge of deep recommender systems, reinforcement learning, and post-training feedback loops.
• Understanding of the advertising ecosystem, including OpenRTB, SSPs, DSPs, ad exchanges, and MMPs.

Culture & Benefits

• Entrepreneurial environment with autonomy, accountability, and a focus on high-impact problems.
• Continuous learning and career development through the Live Your Potential program.
• Medical, dental, and vision insurance with a company-matched HSA, plus a 401(k) company match.
• Vacation, sick days, special occasion time, company holidays, and parental leave.
• RSU grants where applicable, wellness support, employee assistance, and pet insurance.
• Flexible working hours, free office lunch, and pet-friendly offices.