Contact person: Optimize Swift UI Performance

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Location: Tokyo, China

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"My current iOS app is written entirely in Swift and runs well in most scenarios, but a handful of user-interface functions lag just enough to hurt the overall experience. I have already profiled the project with Instruments and can see spikes coming from view rendering and layout passes, yet I would like a seasoned eye to dig deeper, pinpoint the exact bottlenecks, and implement concrete speed improvements.

What I need from you:
• Review the relevant view controllers, custom views, and animation blocks that stall under normal usage.
• Provide targeted refactors—whether that means smarter diffable-data-source updates, off-main-thread work, more efficient Auto Layout constraints, or lightweight SwiftUI view hierarchies—to bring the affected UI interactions to a smooth 60 fps (ideally 120 fps on ProMotion devices).
• Hand back concise commit-based changes plus a brief report explaining what you changed, why it matters, and how much time you shaved off (using Instruments or Xcode’s Performance Metrics as proof).

Acceptance criteria
1. The identified UI flows no longer drop frames on an iPhone 13 or later when tested with the same dataset.
2. No regressions elsewhere in the app; all unit and UI tests must still pass.
3. Your code follows the project’s existing SwiftLint rules and compiles cleanly without new warnings.

If you have experience squeezing the last millisecond out of SwiftUI or UIKit, you should feel right at home here. Let’s make the interface fly." (client-provided description)