Machine Learning Engineer

Uber Technologies Inc.; São Paulo; On-site; BRL 180,000 - 320,000; Full time

Job summary

Uber Technologies Inc. is seeking a Machine Learning Engineer II on the Rider ML team to design, deploy, and optimize production ranking, candidate retrieval, and recommendation systems powering rider experiences globally.

You will work with Data Science, Product, and Platform teams to scale ML infrastructure, monitor model performance, and ensure low latency in real-time inference while upholding high quality features and robust testing.

Qualifications

• 2+ years of professional software engineering experience in machine learning.
• Hands-on experience with modern deep learning frameworks (PyTorch, TensorFlow) and feature engineering.
• Demonstrated ability to write unit/integration tests and monitor system stability.

Responsibilities

• Design, develop, and maintain ML models and code for personalization and ranking features.
• Build and scale ML infrastructure, real-time feature pipelines (Kafka, Flink), and retraining pipelines.
• Own ML software lifecycle from design drafts to monitoring real-time latency and incidents.
• Collaborate with Product, Data Science, and Ops to translate requirements into scalable ML architectures.
• Conduct code and model reviews, offline/online validation, and A/B testing frameworks.
• Maintain feature drift, label leakage, and production performance tracking.

Skills

ML engineering

Testing & monitoring

Cross-functional collaboration

Education

Bachelor's or Master's in CS/ML/DS

Tools

PyTorch

TensorFlow

Spark

Flink

Job description

About the role and team

Engineering at Uber means building high-impact, scalable machine learning solutions under real-world constraints. As a Machine Learning Engineer II on the Rider ML team, you will design, deploy, and optimize production ranking, candidate retrieval, and recommendation systems that power core experiences for millions of riders globally. You will solve complex personalization, real-time inference latency, feature store integration, and large-scale streaming data challenges using state-of-the-art ML modeling architectures (such as deep neural networks, multi-task learning, and GBDT models). We are looking for engineers who excel at system architecture, maintain rigorous feature quality and online model drift monitoring, and thrive on cross-functional collaboration with Data Science, Product, and Platform teams to turn high-throughput data streams into predictive models that move the physical world.

What you’ll do

• Design, develop, and maintain high-quality machine learning models and code for personalization, candidate generation, multi-objective ranking, and recommendation features of moderate complexity.
• Build and scale foundational ML infrastructure, automated model retraining pipelines, and near-real-time streaming feature pipelines (e.g., Flink, Kafka), balancing technical debt while maximizing model AUC, NDCG, and downstream business metrics.
• Own the ML software lifecycle end-to-end, from drafting design docs and setting up feature extraction/transformation pipelines to monitoring real-time inference latency (p95/p99 SLAs) and resolving production model incidents.
• Collaborate across disciplines - including Product, Data Science, and Ops - to translate ambiguous product requirements into scalable ML system architectures.
• Champion ML engineering best practices by conducting rigorous code and model architecture reviews, establishing offline validation (backtesting, cross-validation) and online A/B testing frameworks, and optimizing model inference throughput.
• Navigate internal complexity and stakeholder inquiries to unblock dependencies, maintain rigorous feature drift, label leakage, and model performance tracking, ensuring high reliability in production decisioning systems.

Basic Qualifications

• 2+ years of professional software engineering experience in machine learning.
• Hands-on experience with modern deep learning and ML frameworks (e.g., PyTorch, TensorFlow) and a strong foundation in feature engineering, loss function design, hyperparameter optimization, and offline evaluation metrics.
• Strong proficiency in Python and one or more object-oriented or functional languages (e.g., Go, Java, C++).
• Bachelor’s or Master’s Degree (or equivalent experience) in Computer Science, Machine Learning, Data Science, or a related technical field.
• Demonstrated track record of writing unit/integration tests, verifying model functionality, and implementing basic monitoring for system stability.

Preferred Qualifications

• Demonstrated experience designing, deploying, and maintaining production recommendation, ranking, or personalization systems.
• Hands-on expertise with central feature stores (e.g., Palette), embeddings, and real-time or near-real-time (NRT) feature engineering pipelines.
• Experience establishing robust model monitoring, feature quality tracking (detecting skew/drift), and automated offline evaluation paired with online A/B experimentation systems.
• Proficiency with Big Data frameworks (e.g., Spark, Flink), distributed training, and real-time streaming infrastructure (e.g., Kafka) for distributed, large-scale ML systems.

Ready to Ride?

This isn't the kind of place where you follow a playbook — it's where you help write one. If you're driven by impact, energized by challenge, and ready to shape how the world moves — we'd love to hear from you.

You may be eligible for bonuses, equity, and other compensation, as well as a range of benefits. Explore our benefits.

Offices remain key to collaboration and Uber's culture. Unless approved for full remote work, employees must spend at least 50% of their time in-office. Some roles, like those at greenlight hubs, require full-time in-office presence. Ask your Recruiter for details about this role's requirements.

Uber is proud to be an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires accommodation, please let us know by completing this form.