Job Overview
Location
Cardiff, London or Remote (UK); London
Job Type
Full-time
Category
Machine Learning Engineer
Date Posted
February 24, 2026
Full Job Description
đź“‹ Description
- • Join Monzo Bank, a pioneering digital bank on a mission to make money work for everyone, by revolutionizing traditional banking with innovative solutions and a customer-centric approach.
- • As a Senior Platform Engineer specializing in Machine Learning, you will play a pivotal role within the Platform Collective, a team dedicated to building and maintaining the foundational infrastructure, tools, and processes that empower all Monzo technology teams.
- • Your primary responsibility will be to design, build, and maintain the robust infrastructure and sophisticated tools that enable Monzo's teams to efficiently train, evaluate, deploy, and serve Machine Learning models and features at scale.
- • You will collaborate closely with Machine Learning teams, leveraging your expertise and curiosity to understand their unique needs and to develop elegantly simple, yet powerful, solutions.
- • This role offers the unique opportunity to shape the future of ML infrastructure at a rapidly growing and award-winning fintech company, directly impacting the magical experiences Monzo provides to millions of customers.
- • You will be instrumental in fostering a culture of innovation and efficiency, ensuring that ML capabilities are seamlessly integrated and readily accessible across the organization.
- • Your work will involve developing and maintaining scalable, reliable, and performant ML platforms, contributing to critical areas such as fraud detection, customer personalization, risk assessment, and operational efficiency.
- • You will be a hands-on engineer, actively contributing to the codebase and infrastructure, while also providing technical leadership and guidance to the team.
- • Responsibilities include architecting and implementing CI/CD pipelines for ML models, managing cloud-based ML environments (AWS and GCP), and optimizing resource utilization for cost-effectiveness and performance.
- • You will also be involved in developing tools for data management, model monitoring, and experiment tracking, ensuring a comprehensive end-to-end ML lifecycle.
- • A key aspect of the role is to champion best practices in MLOps, promoting automation, reproducibility, and operational excellence.
- • You will work with a modern technology stack, including Go for application code, Python for ML development, Kubernetes for workload orchestration, Terraform for infrastructure as code, and Envoy Proxy for service mesh capabilities.
- • While direct experience with all these technologies is not strictly required, a strong foundation in backend engineering and a willingness to learn are essential.
- • You will contribute to the strategic roadmap for the ML platform, identifying opportunities for improvement and innovation.
- • This role requires a proactive approach to problem-solving, a deep curiosity for systems, and a passion for automation.
- • You will engage in system design discussions, code reviews, and contribute to the continuous improvement of our engineering practices.
- • The opportunity to work remotely across the UK or from our London hub provides flexibility, allowing you to work from where you feel most productive.
- • You will be part of a supportive and collaborative team environment, with regular opportunities for team lunches, social events, and knowledge sharing.
- • Monzo's commitment to learning and development, including a dedicated learning budget, ensures you can continuously grow your skills and stay at the forefront of ML platform engineering.
- • You will be joining a company that values diversity, inclusion, and employee well-being, offering a competitive salary, stock options, and a comprehensive benefits package.
- • This is an exciting chance to make a significant impact on a product used by millions, helping to build the future of banking and financial services.
- • You will be empowered to take ownership of critical components of the ML platform, driving projects from conception to deployment and beyond.
- • Your contributions will directly enable Monzo to leverage the power of machine learning to enhance customer experiences, improve operational efficiency, and drive business growth.
- • We encourage a culture of experimentation and learning, where you can explore new technologies and approaches to solve complex challenges.
- • You will have the opportunity to mentor junior engineers and contribute to the overall technical growth of the team.
- • The role involves working with cutting-edge cloud technologies and distributed systems, providing ample opportunities for technical challenges and professional development.
- • You will be a key player in ensuring the security, reliability, and scalability of our ML infrastructure, which underpins many of Monzo's core services.
- • We are looking for individuals who are passionate about building robust, scalable, and user-friendly platforms that empower data scientists and ML engineers.
- • Your work will directly contribute to Monzo's mission of making financial services more accessible, efficient, and enjoyable for everyone.
- • Embrace the challenge of working in a fast-paced, regulated environment, where innovation and stability are paramount.
- • Contribute to the evolution of our ML tooling and infrastructure, ensuring it remains state-of-the-art and meets the growing demands of the business.
- • Be a champion for data-driven decision-making and the ethical application of machine learning within the company.
- • This role is an excellent opportunity for a seasoned platform engineer to specialize in the exciting and rapidly evolving field of Machine Learning infrastructure.
- • You will be part of a company that genuinely cares about its employees and customers, fostering a positive and inclusive work environment.
- • Help us build the next generation of financial products powered by intelligent systems.
🎯 Requirements
- • Experience working with cloud platforms such as AWS and/or GCP.
- • Proven hands-on experience in building Machine Learning pipelines and the platforms that support them.
- • Experience working with container orchestration systems like Kubernetes.
- • Experience with strongly typed languages, writing and working on backend software.
- • Curiosity about systems and a drive to dive deep to investigate issues.
- • Comfort working in a team that deals with ambiguity and a natural inclination to solve problems through automation.
🏖️ Benefits
- • £95,000 - £130,000 base salary + stock options.
- • Learning budget of £1,000 a year for books, training courses, and conferences.
- • Flexible working hours and trust to work the hours that suit you and your team, with options for UK remote or London-based work.
Skills & Technologies
Python
Go
AWS
GCP
Kubernetes
Senior
Remote
ÂŁ95k-130k
About Monzo Bank Limited
Monzo Bank Limited is a UK-regulated digital bank offering personal, joint, and business accounts, savings, loans, overdrafts, and mortgages via a mobile-first platform. Licensed by the PRA and FCA, it provides real-time spending notifications, budgeting tools, and fee-free foreign transactions. Founded in 2015 as Mondo, it rebranded in 2016 and serves over nine million customers.
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