Staff Machine Learning Engineer

The role

You will lead high-impact research projects bridging state-of-the-art AI and production-grade financial systems. You will build and optimize architectures like Transformers and GNNs for use cases such as Credit, RecSys, and GenAI.

What you will do

• Lead and execute complex applied research initiatives independently
• Build and optimize architectures like Transformers and GNNs
• Address difficult and ambiguous modeling problems
• Design architectures that respect MLOps constraints
• Develop and deliver innovative solutions for downstream production models
• Participate in cross-functional collaborations
• Establish technical standards for experimentation, model evaluation, and code quality
• Serve as a technical mentor for senior engineers and researchers
• Participate in hiring interview panels
• Lead internal task forces to improve the ML lifecycle

Required qualifications

• 5-7+ years in applied AI/ML
• Proven track record of delivering research-driven systems into production environments
• Deep expertise in Deep Learning architectures (Transformers, Multimodal, or GNNs)
• Strong coding skills in Python
• Proficiency with frameworks like PyTorch, JAX, or TensorFlow
• Solid understanding of MLOps and the constraints of deploying models at scale
• Sophisticated skills in ML problem formulation
• Ability to navigate uncertainty when data is messy or unavailable
• Ability to communicate complex technical concepts to technical peers and cross-functional stakeholders
• Experience with large-scale experimentation and A/B testing

Benefits

• Opportunity of earning equity at Nu
• Medical Insurance
• Dental and Vision Insurance
• Life Insurance and AD&D
• Extended maternity and paternity leaves
• Nucleo - Our learning platform of courses
• NuLanguage - Our language learning program
• NuCare - Our mental health and wellness assistance program
• 401K
• Saving Plans - Health Saving Account and Flexible Spending Account
• Work-from-home Allowance
• Relocation Assistance Package, if applicable

Before you apply

• Recruitment process may involve the use of artificial intelligence–enabled tools
• Nu does not provide individualized technical feedback

About the company

Nu serves more than 140 million customers with a mission to fight complexity and empower people. The company uses proprietary technology and data at scale to power its digital platform.