Chris Leonard, Senior Software Engineer building apps, developer tools and digital products.

Senior iOS Engineer — Atom bank

Promoted to Senior iOS Engineer, helping shape the technical direction of Atom's iOS platform. My work focuses on modernising the application through SwiftUI adoption, modular architecture using Swift Package Manager, improving engineering standards, CI/CD pipelines and delivering secure, high-quality features within one of the UK's leading digital banks.

I have led the ongoing transition of the codebase from UIKit to SwiftUI, helping define architectural patterns, drive adoption across the team and ensure the migration improves long-term maintainability and development velocity.

Alongside product development, I modernised CI/CD by helping move from self-hosted GitLab runners to Xcode Cloud, improving build reliability, feedback times and alignment with Apple's ecosystem.

I have also planned wider platform evolution, including modularisation of the codebase and preparation for Swift 6 adoption.

iOS Engineer — Atom bank

Joined Atom as an iOS Engineer, developing production features across the award-winning mobile banking application. Worked on native iOS development, REST API integration, application architecture, accessibility, performance optimisation and Agile software delivery within a highly regulated financial environment.

I joined Atom Bank in April 2019 as part of the iOS development team, working closely with User Experience and Customer Experience teams to deliver high-quality mobile banking features and maintain strong product standards.

Software Engineer — Nebula Labs

Developed native iOS applications and modern software solutions for commercial clients while gaining experience across the full software development lifecycle. Worked closely with designers, developers and stakeholders to deliver high-quality digital products.

Within this role, I was part of a team creating native iOS and Android applications using modern tools and languages. Applications were planned, designed, prototyped and developed using a sprint-style development process.

The experience helped me grow through planning sprints, solving issues as they appeared and working across varied projects where each product had its own constraints and goals.

Independent Developer

Alongside my full-time career, I've continued building software independently, creating native iOS applications, developer tools and digital products. My work ranges from client consultancy through to launching open-source libraries and products such as Swift Report Card, Glucostats, Swift Package Audit and other developer-focused tools, with a passion for creating software that is simple, polished and enjoyable to use.

My independent work spans personal app ideas, commercial client work, developer utilities, aviation-related tools and health-focused apps. Several of these projects have been released publicly and used by a global audience.

I specialise in native iOS and macOS development with Swift and SwiftUI, with an emphasis on clean architecture, performance and usability. I have also delivered freelance work through platforms such as Fiverr and PeoplePerHour, helping clients prototype, develop and troubleshoot mobile apps.