Machine Learning Engineer III

Summary

Join MyFitnessPal's Data Science team as a Machine Learning Engineer and build impactful predictive models and AI that enhance the MyFitnessPal ecosystem. You will design and deploy models improving advertising performance and enabling smarter user segmentation, focusing on the technical implementation of ML pipelines supporting ad personalization and targeting. This role demands cross-functional collaboration with marketing, product, and data stakeholders, leveraging tools like Google Ad Manager (GAM). Success requires rapid iteration, pragmatic decision-making, strong communication, thoughtful experimentation, and a data-driven approach. This is an individual contributor role with mentorship expectations, encouraging innovation and the use of cutting-edge technologies. MyFitnessPal offers a competitive salary and a wide range of employee benefits.

Requirements

• Have 4–6+ years of machine learning experience, ideally within advertising, martech, or audience targeting domains
• Hold a Bachelor’s or Master’s degree in Computer Science, Data Science, Statistics, or a related field—or equivalent experience
• Have hands-on experience with ad tech platforms such as Google Ad Manager (GAM), DV360, or similar tools
• Demonstrate the ability to build, test, and iterate on user segmentation strategies for marketing or advertising
• Are comfortable working with cross-functional teams to define user cohorts and evaluate their performance
• Are highly proficient in Python and SQL, with experience in data wrangling, model development, and experimentation frameworks
• Have experience building models in production environments, preferably supporting real-time or large-scale pipelines
• Understand causal inference, attribution modeling, or experimentation techniques like A/B testing and uplift modeling
• Communicate clearly across technical and non-technical audiences to a variety of stakeholders and enjoy working collaboratively on data products

Responsibilities

• Build and deploy machine learning models and data pipelines to power advertising personalization, user segmentation, and audience cohorting
• Leverage GAM and other ad tech tools to create and evaluate user cohorts for targeting and experimentation
• Partner with marketing, data science, product, and engineering teams to define metrics and evaluate model-driven campaigns
• Design experiments to measure model impact on advertising performance (e.g., CTR, CVR, revenue per user)
• Build pipelines and systems to support scalable cohort-based testing and ML deployment
• Optimize feature engineering, model training, and evaluation loops for advertising-related use cases
• Collaborate with stakeholders to identify opportunities for improving user targeting and increasing campaign ROI
• Ensure models meet high standards for performance, reliability, and reproducibility

Benefits

• Healthcare
• Parental planning
• Mental health benefits
• Annual performance bonus
• A 401(k) plan and match
• Responsible time off
• Monthly wellness and technology allowances
• Face-to-Face Connections : We value personal connections. Enjoy opportunities to meet and connect with your team members in person to help forge meaningful relationships that extend beyond the virtual realm. Teams meet as often as needed and all of MyFitnessPal gathers annually
• Flexibility At Its Best: Achieve the work-life balance you deserve. Enjoy a flexible time-off policy with our Responsible Time Off benefit
• Give Back: Use your volunteer days off to support what matters most to you. Each full time teammate receives 2 days per calendar year to give back to their community through service
• Mentorship Program: Take control of your career through our mentorship program where, if you’d like, you will be matched with a teammate who can help you scale your skills and propel your growth
• Family-Friendly Support : Embrace the journey with confidence and care. Enjoy our paid maternity and paternity leave, to provide time to balance family responsibilities with your career and take the time needed to strengthen family relationships. We understand the complexities of starting or expanding a family, which is why we provide best-in-class comprehensive assistance for fertility-related matters
• Wellness Comes First : Live Good Health is one of our core values. Receive a monthly Wellness Allowance, empowering you to focus on your physical and mental well-being by choosing from a range of wellness initiatives, including dedicated mental health days
• Celebrate Greatness: Your hard work deserves recognition! Our reward and recognition platform empowers peers to acknowledge and reward each other for the exceptional contributions they make
• Elevate Your Health & Fitness: Get access to MyFitnessPal Premium, allowing you to take your fitness, health and wellness journey to new heights
• Unlock Your Potential: Access our virtual learning and development library, and participate in training opportunities to continuously grow and enhance your skills
• Championing Inclusion : Our dedicated DEI Committee actively fosters a diverse and inclusive workplace by setting actionable goals and evaluating progress across the organization
• Healthcare Matters: Your well-being is our priority. Take advantage of our competitive medical, dental, and vision benefits that cater to your holistic healthcare needs. Feel secure and supported on your wellness journey
• Secure Your Future: Benefit from our retirement savings program, giving you peace of mind for your financial goals. Reach them sooner with MyFitnessPal’s competitive employer match