Senior Mobile Engineer — iOS & Android

AceSpeak is looking for a Senior Mobile Engineer to build and improve our native iOS and Android app experience. You will work on recording, playback, scoring and progress-tracking features that help users practise speaking confidently.

Responsibilities

• Develop native app features for iOS and Android
• Improve recording, playback and clip-review flows
• Ship app updates with strong stability and performance
• Collaborate with product, design and backend teams
• Support App Store and Google Play release processes

What we’re looking for

• 5+ years building mobile apps, preferably on both iOS and Android
• Strong Swift/SwiftUI or Objective-C skills, plus Kotlin/Java
• Experience with native audio/video capture and playback
• A user-focused approach and high attention to detail
• Good written English and strong collaboration skills

Nice to have

• App Store / Google Play release experience
• Subscription and in-app purchase experience
• Mobile accessibility and localisation knowledge

AceSpeak candidate exercise

All applicants are required to complete a short AceSpeak practice exercise and achieve a total AceSpeak score above 3,000 before submitting an application.

1. Download AceSpeak on iOS or Android.
2. DM @acespeak.uk on Instagram with the role title to request a complimentary analysis token. The token is issued privately; do not purchase a subscription or share it.
3. Record a 90-second to 2-minute response to: "Describe a product or project you helped improve and what you learned."
4. Practise and re-record until your total AceSpeak score is above 3,000.
5. Send us a screenshot showing your score and display name. Please do not send the recording.

The score is one part of a human-reviewed application process and is not used as the sole hiring criterion. If you cannot use Instagram, the app or the scoring format, need another token, or need a reasonable adjustment, email and we will arrange complimentary access or an equivalent alternative exercise.

Employment: Full time. Location: Remote / hybrid within the UK; London preferred. Salary: £60,000–£80,000 / year.