Staff Engineer (Ruby)

Requirements

• You’re excited by the opportunity to own and influence technical direction at a pillar level
• You’ve operated at senior/staff level across multiple teams or complex domains
• You bring strong technical judgment and think in long-term, scalable solutions
• You’re comfortable leading without authority and aligning teams around a shared direction
• You have a track record of building systems and practices used beyond your immediate team
• You enjoy mentoring and raising the bar for others
• You have strong, hands-on experience with Ruby on Rails (essential)

What the job involves

• Acting as a Staff IC across a pillar, shaping technical direction and driving delivery across multiple squads
• Partnering with senior peers to define architecture and lead complex, high-impact initiatives
• Bringing teams together to ship ambitious product work that improves users’ financial health
• Building shared systems, patterns, and tooling that raise the bar across engineering
• Staying hands‑on in our Ruby on Rails monolith — designing APIs, data models, and scalable services
• Anticipating risks and opportunities early, influencing plans and technical strategy
• Mentoring engineers and TLs, growing the next generation of technical leaders
• Cleo is built as a Ruby on Rails monolith with a single React Native app frontend, utilising TypeScript. We also leverage Python for machine learning services and PostgreSQL for our database, all hosted on AWS. Our CI/CD pipeline is fully automated, with production deployments happening on every merge via Kubernetes
• Our backend engineers deploy multiple times a week, and we release our frontend app to Google and Apple for review at least once a week
• While we take a pragmatic approach, we place a strong emphasis on quality. Our code is peer-reviewed, and we maintain automated testing using Minitest and CircleCI
• We’re also actively working towards a more modular architecture, focusing on separating concerns to achieve all the benefits of microservices within a monolith, while progressively refactoring our code as we build new features. Everyone in the engineering team contributes to driving our technical strategy, voices & ideas from all levels are valued: we are all owners at Cleo

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