Monzo is hiring a Senior Staff Machine Learning Scientist, Operations

Monzo is looking for a Senior Staff Machine Learning Scientist, Operations to serve as our foremost technical authority in Machine Learning. You will shape foundational ML strategy and platforms that support Operations and influence ML solutions across the business.

What You'll Do

• Define and execute the strategic vision for ML across Operations and adjacent business areas.
• Define reusable ML architectures and modelling standards adopted by multiple teams, and guide the development of complex systems that serve as the foundation for multiple products and problem spaces.
• Act as a senior technical authority, setting best practices and architectural patterns for ML across the organization.
• Collaborate with Engineering, Product, and Leadership teams to integrate ML-driven solutions into core business processes.
• Advocate for and implement responsible AI practices, ensuring fairness, robustness, and transparency in our models.
• Mentor and coach ML practitioners at all levels, fostering a culture of continuous learning and innovation.
• Engage with the broader ML community, sharing knowledge through conferences, blog posts, and open-source contributions.

What We're Looking For

• A proven track record of leading large-scale ML initiatives with tangible business impact, preferably in a fast-moving tech company.
• Experience leading the development and adoption of reusable ML modelling patterns, architectures, or infra across large organizations.
• Experience developing state-of-the-art deep learning models, LLMs, and advanced AI architectures.
• Industry expert in ML model development, deployment, and MLOps at scale.
• Deeply comfortable with Python, SQL, and ML frameworks (e.g., TensorFlow, PyTorch) and have experience working in a microservices architecture.
• Extensive experience with real-time ML applications, reinforcement learning, graph-based models, and/or NLP.
• Can communicate complex ML concepts to both technical and non-technical audiences, influencing senior stakeholders and executives.
• Thrive in ambiguous, fast-changing environments and have a proactive, problem-solving mindset.
• Passion for mentoring, and can elevate the ML skill set across the organization influencing both cross-functional and executive strategy.

Nice to Have

• A track record of shaping ML strategy and system design in highly-scaling support or operational environments.
• Contributions to industry standards, open source software libraries, or public thought leadership in machine learning systems.

Technical Stack

• Python
• SQL
• TensorFlow
• PyTorch
• Go Lang

Team & Environment

You'll be part of the Operations Data team within the Operations Collective, which includes over 25 people across four data disciplines.

Benefits & Compensation

• Compensation range: £157,000-210,000
• Relocation assistance to the UK
• Visa sponsorship
• Flexible working hours
• Learning budget of £1,000 a year for training courses and conferences
• Part-time work options

Work Mode

This is a hybrid position. You can be based in Cardiff, London, or work remotely within the UK.

Monzo is an equal opportunity employer. All applicants will be considered for employment without attention to age, ethnicity, religion, sex, sexual orientation, gender identity, family or parental status, national origin, or veteran, neurodiversity or disability status.