Senior Machine Learning Engineer - Chat

Summary

Join Cleo, a profitable and fast-growing fintech unicorn, as a Senior Machine Learning Engineer. You will build novel solutions to real-world problems, such as creating chatbots, classifiers, and optimizing transactions. Lead technical work within a team, train and integrate cutting-edge machine learning across various products, and deploy them for millions of users. You will collaborate with cross-functional teams to ship features improving user financial health, propose and lead technical work, and keep Cleo at the forefront of NLP. Mentor colleagues and promote best practices for using LLMs. Your work will directly impact users, helping improve their financial health. This is a chance to join a team of brilliant individuals passionate about making a real difference and share in Cleo’s success as we scale.

Requirements

• Experience in industry machine learning roles as a technical leader or senior engineer
• Excellent knowledge of both Data Science (python, SQL) and production tools
• A deep understanding of probability and statistics fundamentals
• Big picture thinking to correctly diagnose problems and productionising research
• Top tier communication skills, to be able to partner with Product and Commercial Leaders
• Industry-leading contributions to your field, communicated through conferences, blogs, talks, or open-source projects
• Advanced Degree in a quantitative discipline or equivalent commercial experience

Responsibilities

• Training and fine-tuning models to solve customer problems across our chatbot and the bank transaction data behind it
• Deploying these models into our production environments using our in-house ML platform, which you can read about on our blog: Let's have an Espresso: MLOps at Cleo . Or integrate with LLMs hosted by OpenAI, Anthropic, GCP, AWS and others
• Working cross-functionally with backend engineers, data analysts, UX writers, product managers, annotation teams, and others to ship features that improve our users’ financial health
• Taking the initiative to propose & lead technical work towards problems that were previously unknown or poorly understood. Driving change at the chapter level that affects multiple squads
• Keeping Cleo at the forefront of NLP by driving the adoption of appropriate state-of-the-art techniques and communicating the team’s successes and learnings at the company level & beyond
• Mentoring & advising colleagues on their choices of models, architecture, and evaluation, promoting best practices for how we use LLMs
• Building AI Agents to explore and derive insights from users transactional data
• Developed deeper understanding of users finances through models extracting meaning from transactional data. Think about your bank statement, how often do you not know what a transaction is?
• Developed contextual intent classifiers to understand what conversations users are having with Cleo, enabling control of how Cleo should respond
• Building ML models to understand the actions that users have available to them in Cleo and provide those contextually in conversations
• Built ML models to understand the risk of customers using bank transaction features and user activity
• Built models to optimise the payment success for our customers and optimising the costs for the business. Think of this as a two-sided optimisation problem

Preferred Qualifications

• Strong experience with additional programming languages, such as Java, Scala, C++
• Industry-leading contributions to your field, communicated through conferences, blogs, talks, or open-source projects

Benefits

• A competitive compensation package (base + equity) with bi-annual reviews, aligned to our quarterly OKR planning cycles . You can view our public progression framework and salary bandings here: https://cleo-ai.progressionapp.com
• Work at one of the fastest-growing tech startups, backed by top VC firms, Balderton & EQT Ventures
• A clear progression plan. We want you to keep growing. That means trying new things, leading others, challenging the status quo and owning your impact. Always with our complete support
• Flexibility . We can’t fight for the world’s financial health if we’re not healthy ourselves. We work with everyone to make sure they have the balance they need to do their best work
• Work where you work best. We’re a globally distributed team. If you live in London we have a hybrid approach, we’d love you to spend one day a week or more in our beautiful office. If you’re outside of London, we’ll encourage you to spend a couple of days with us a few times per year. And we’ll cover your travel costs, naturally
• Company-wide performance reviews every 6 months
• Generous pay increases for high-performing team members
• Equity top-ups for team members getting promoted
• 25 days annual leave a year + public holidays (+ an additional day for every year you spend at Cleo, up to 30 days)
• 6% employer-matched pension in the UK
• Private Medical Insurance via Vitality, dental cover, and life assurance
• Enhanced parental leave
• 1 month paid sabbatical after 4 years at Cleo
• Regular socials and activities, online and in-person
• We'll pay for your OpenAI subscription
• Online mental health support via Spill
• Workplace Nursery Scheme