Senior Mobile Developer

$50–100/hr

rate as listed

Workload: ~15 hrs/week
Engagement: Project-based
Location: Location not stated
Field: STEM and Coding

Create challenging mobile engineering tasks that test frontier AI models on debugging, feature development, refactoring, and performance optimization. Each task requires a reproducible environment, deterministic verification, and a reference solution.

The work

You will design realistic, difficult mobile coding tasks using repositories suited to your expertise. Day to day, this means defining problems involving subtle bugs, non-trivial features, application state, lifecycle behavior, refactoring, or performance, then packaging each problem in a reproducible environment and providing a golden reference solution.

What the platform screens for

The screening is likely to focus on concrete examples of complex mobile work, your ability to explain architecture and debugging decisions under follow-up, and your judgment when designing deterministic verifiers. Strong candidates can distinguish valid implementation differences from incomplete, hard-coded, or behaviorally incorrect solutions.

Preferred technical background

Preferred qualifications include significant hands-on expertise in at least one track: TypeScript or JavaScript with React Native, Dart with Flutter, Swift with SwiftUI or UIKit, or Kotlin with Jetpack Compose or the Android View system. The role also prefers deep knowledge of mobile architecture, state management, asynchronous programming, application lifecycle, complex debugging, and performance improvement.

Logistics

This is a remote contractor role at roughly 15 hours per week. Compensation is output-based, with payment tied to tasks that meet project specifications, and minimum weekly submission requirements are provided during onboarding. The listing does not specify whether collaboration is fully async, and selected experts are expected to begin their first tasks within 24–48 hours after onboarding.

Pay band: $50–100/hr

What they look for

Kotlin
Swift
Mobile

Included with this listing

Interview prep — 10 questions

Matched to what this platform's screening actually measures. Answer each out loud in 60–90 seconds: claim → concrete example → implication.

What it tests: This tests whether your claimed expertise is grounded in verifiable work using React Native, Flutter, iOS, or Android rather than broad familiarity with several stacks.
A strong answer: Identify one primary track, the application context, your personal ownership, and a difficult technical constraint such as lifecycle handling, state synchronization, native integration, or performance. Include enough architectural detail to support follow-up questions.
Where people lose it: Listing several frameworks without identifying what you personally implemented makes it difficult to verify senior-level depth.

Summary, eligibility guidance and screening preparation are prepared by Sidequest from the platform's posting. Check the source listing before applying.

STEM AND CODING on Sidequest

What stem and coding AI work pays

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