Antonio González Valdepeñas

Senior iOS Engineer · Participant Experience (B2C)

• ·Own the iOS Participant Experience — the B2C apps participants use to actually run a UserTesting test on their device.
• ·Ship in human-in-the-loop with Claude Code and Codex pair-programming production iOS features; I architect, review and own the result.
• ·Build the component library and shared infrastructure the rest of the iOS team ships on top of.
• ·Embedded with PM, design and platform — feature decisions through to App Store release.

Swift 6 · SwiftUI · Swift Concurrency · Modular SPM · Claude Code · Codex · Cursor · Datadog

iOS Engineer · Jobs marketplace, 20M users

• ·Owned the end-to-end job-application flow — the company’s primary revenue driver, serving 20M monthly active users on candidate and recruiter sides.
• ·Lifted apply intention rate +120% (primary business KPI) via data-driven A/B testing and UX optimisation.
• ·Pushed test coverage 60% → 95%+ (Swift Testing, XCUITest, snapshot) and cut build times ~40% with a fully modular SPM codebase.
• ·Architecture in SwiftUI + TCA + Clean Architecture; led migration to Swift 6, async/await and accessibility-first across multiple teams.

SwiftUI · TCA · Clean Architecture · GraphQL (Apollo) · Combine · Swift Testing · XCUITest · Bitrise

iOS Developer · Consulting (XING, 20 Minutos, Banca March)

• ·Designed and built the iOS architecture for the 20 Minutos news app from scratch — solo first ship.
• ·Rotated through XING and Banca March in between — embedded into client codebases, useful by week two.

Swift · UIKit · MVVM · REST · Combine · Bitrise

Mobile Developer · Video streaming SDK

• ·Maintained and developed a video streaming SDK shipped inside Sky, HBO, Vodafone and Bell Media — millions of users across iOS and Android.
• ·Shipped multi-camera synchronised playback and interactive video against AVFoundation (iOS) and ExoPlayer (Android).

Swift · Kotlin · AVFoundation · ExoPlayer