Cleo is on a mission to change humanity's relationship with money by providing a hyper-intelligent financial advisor accessible to everyone.
The company is a profitable, fast-growing unicorn with over $200 million in ARR, growing over 2x year-over-year.
The role involves building and maintaining decisioning systems that power Cleo’s core product, which is critical for user experience, growth, and profitability.
The primary focus will be on integrating ML-driven credit and eligibility models into Cleo's Ruby on Rails monolith.
Responsibilities include owning the productionisation of services, from data ingestion and interface design to monitoring, alerting, and runtime observability.
The position requires close collaboration with ML engineers, analysts, and PMs to expose model outputs, debug anomalies, and provide necessary tooling for stakeholders.
The role also involves contributing to the wider Ruby chapter to improve the Ruby monolith for users and fellow engineers.
Requirements:
Candidates must be backend engineers comfortable in technically complex domains, especially those involving machine learning, financial decisioning, or large-scale data systems.
Proficiency in Ruby and experience in building and maintaining production systems that interface with machine learning models, data pipelines, or high-throughput decision engines is required.
Exposure to Python and ML concepts is a plus, but deep ML knowledge is not mandatory.
A strong focus on observability, system reliability, and deployment best practices is essential.
Candidates should be data-aware, understanding data lifecycle, ownership, transformations, and downstream consumer reliance.
Strong cross-functional collaboration skills are necessary to work effectively with product managers, analysts, and ML engineers.
Benefits:
A competitive compensation package that includes base salary and equity, with bi-annual reviews aligned to quarterly OKR planning cycles.
Opportunities to work at one of the fastest-growing tech startups, backed by top VC firms.
A clear progression plan to support personal and professional growth, encouraging new challenges and leadership opportunities.
Flexible working arrangements to ensure a healthy work-life balance.
Options to work in a hybrid model if based in London, with travel costs covered for those outside London visiting the office.
Company-wide performance reviews every six months and generous pay increases for high-performing team members.
Equity top-ups for team members who get promoted.
25 days of annual leave plus public holidays, with an additional day for each year spent at Cleo, up to 30 days.
A 6% employer-matched pension in the UK, private medical insurance, dental cover, and life assurance.
Enhanced parental leave and a one-month paid sabbatical after four years at Cleo.
Regular social activities, online and in-person, and coverage for an OpenAI subscription.
Online mental health support and a workplace nursery scheme, among other benefits.
