Principal Machine Learning Engineer

At Bumble, our mission is to create a world where all relationships are healthy and equitable. As part of our AI & Matching team, this role sits at the forefront of shaping how millions of people connect, build friendships, and find meaningful relationships. Reporting into our SVP of AI & Data, you will play a critical role in advancing intelligent systems that power safe, personalised, and engaging user experiences across our platforms.

Requirements

• Define and lead the technical strategy for AI and Machine Learning systems that power recommendations, ranking, and personalization across Bumble products, delivering measurable improvements in user engagement and safety
• Design, develop, and deploy production-grade models using modern ML frameworks such as PyTorch, ensuring scalability and reliability in high-traffic environments
• Build and deploy production AI Agents using raw and fine-tuned foundational Large Language Models (LLMs), along with sub-agents, tools, and MCP integrations
• Architect end-to-end ML pipelines, integrating data processing (e.g. Spark, Airflow) with model training, evaluation, and deployment workflows
• Drive experimentation frameworks, including A/B testing and offline evaluation, to continuously improve model performance and product outcomes
• Partner cross-functionally with Product, Engineering, and Data leadership to translate business challenges into impactful ML solutions, collaborating with purpose and influencing at senior levels
• Mentor and elevate senior individual contributors, fostering a culture of Excellence, Curiosity, and continuous learning across the ML community
• Take ownership of complex, ambiguous problem spaces, seeing initiatives through from insight to impact while adapting approaches with an agile mindset
• Champion responsible AI practices, ensuring fairness, transparency, and user safety are embedded into all machine learning systems

Benefits

• 401k Matching
• Retirement Plan
• Generous Paid Time Off
• Visa Sponsorship
• Relocation Assistance
• Four Day Work Week
• Generous Parental Leave
• Tuition Reimbursement