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.

Download AceSpeak on iOS or Android.

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.

Record a 90-second to 2-minute response to: "Describe a product or project you helped improve and what you learned."

Practise and re-record until your total AceSpeak score is above 3,000.

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 [email protected] 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.

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