Hybrid Principal Machine Learning Engineer

Posted 3 hours ago

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About the role

  • Principal Machine Learning Engineer leading AI and Machine Learning systems at Bumble for recommendations and personalization. Driving improvements in user engagement and safety across Bumble products.

Responsibilities

  • 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

Requirements

  • Typically requires 10–15 years of experience, though we welcome candidates with alternative backgrounds that demonstrate equivalent skills.
  • Deep expertise in machine learning, with hands-on experience building and deploying large-scale systems in production environments
  • Strong proficiency in Python and at least one major ML framework (e.g. PyTorch, TensorFlow), with experience in areas such as recommendation systems, ranking models, or NLP
  • Expertise in prompting and fine-tuning Large Language Models (LLMs) and building production AI Agents
  • Proven experience designing scalable data and ML pipelines using tools such as Spark, Airflow, or similar distributed systems
  • Demonstrated ability to operate as a senior individual contributor, influencing technical strategy and decision-making without direct authority
  • Experience partnering effectively across functions, collaborating with purpose and taking ownership of outcomes in complex organisational environments
  • A track record of mentoring and uplifting others, role modelling Respect and Excellence while building inclusive, high-performing teams
  • Strong AI fluency, with the ability to independently design, evaluate, and optimise ML systems, and guide others in the responsible and effective application of AI

Benefits

  • AI Fluency
  • Inclusion at Bumble Inc.
  • AI in Bumble Inc. Hiring

Job title

Principal Machine Learning Engineer

Job type

Experience level

Lead

Salary

Not specified

Degree requirement

No Education Requirement

Location requirements

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