Callum Trounce
Staff Engineering Lead at ASOS.com
Watford, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolCallum Trounce is a Staff Engineering Lead and seasoned iOS engineer with nine years of experience designing and scaling mobile apps for high‑traffic products. At ASOS he defines roadmap and architecture for the iOS foundation that supports a federated contributor model for a 20M MAU app, balancing hands‑on coding with team health and process improvements. He champions experimentation, measurement and customer obsession to drive pragmatic engineering decisions and continuous delivery. Callum has progressed from developer intern to technical lead, shipping features, tooling and best practices in both Objective‑C and Swift across agency and product environments. He blends individual contributor rigor—pair programming and mentoring—with strategic vision for scalable tooling and developer enablement. Based in Watford, he brings a pragmatic, metrics‑driven approach to growing engineering capability in fast‑moving teams.
9 years of coding experience
9 years of employment as a software developer
Diploma of Higher Education, Computing, 2:1, Diploma of Higher Education, Computing, 2:1 at Plymouth UniversityHigh School, High School at Rickmansworth School
Github Skills (22)
objective-c10
ios10
image-loading10
xcode10
persistent10
fetch10
swift-package10
swift10
macos10
cocoapods10
swiftui10
asynchronous9
swift-package-manager9
storage9
carthage9
Programming languages (1)
Github contributions (5)
cmtrounce/SwURL
Jun 2019 - Aug 2021
Lightweight and customisable async image loading in SwiftUI. Supports on-disk storage, placeholders and more!
Contributions:12 releases, 1 review, 129 commits in 2 years 2 months
persistent-storageurlsswift-package-managerasynchronousimage-loading
cmtrounce/cmtrounce.github.io
Jan 2017 - Jun 2023
Contributions:18 pushes, 1 branch in 6 years 6 months
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