Hybrid Senior Staff Machine Learning Scientist – Operations

at Monzo Bank

• Job title: Senior Staff Machine Learning Scientist – Operations
• Job type: Full Time
• Experience level: Senior
• Salary: £157,000 - £210,000 per year
• Degree requirement: Postgraduate Degree
• Tech skills: Microservices, Python, PyTorch, SQL, Tensorflow, Go
• Location requirements: Hybrid, Cardiff, United Kingdom

About the role

• Senior Staff Machine Learning Scientist at Monzo developing ML solutions for customer operations. Leading ML strategy and mentoring future talent in a fast-paced fintech environment.

Responsibilities

• 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
• 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

Requirements

• Proven track record of leading large-scale ML initiatives with tangible business impact, preferably in a fast-moving tech company
• Led 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)
• Experience working in a microservices architecture (Go Lang experience is a plus)
• Extensive experience with real-time ML applications, reinforcement learning, graph-based models, and/or NLP
• Ability to communicate complex ML concepts to technical and non-technical audiences, influencing senior stakeholders and executives
• Thrive in ambiguous, fast-changing environments with a proactive, problem-solving mindset
• A passion for mentoring, can elevate the ML skill set across the organization influencing both cross-functional and executive strategy

Benefits

• We can help you relocate to the UK
• We can sponsor visas
• This role can be based in our London office, but we're open to distributed working within the UK (with ad hoc meetings in London)
• Flexible working hours and trust you to work enough hours to do your job well, at times that suit you and your team
• Learning budget of £1,000 a year for training courses and conferences
• If you prefer to work part-time, we'll make this happen whenever we can - whether this is to help you meet other commitments or strike a great work-life balance