Android Engineer (Kotlin and Java)

About the Role

As an Android Engineer (Kotlin / Java), you will work remotely on an hourly paid basis to review AI-generated Android code, mobile architectures, and technical explanations, as well as produce high-quality reference implementations and step-by-step reasoning for complex engineering problems.

You will assess solutions for correctness, clarity, security, performance, reliability, and adherence to the prompt; identify issues in Jetpack Compose/UI, concurrency, threading, memory/performance, app lifecycle, networking, persistence, and build/release practices; fact-check technical information; write high-quality explanations and model solutions that demonstrate best practices; and rate and compare multiple AI responses based on correctness and reasoning quality.

About the Company

This contractor role is with SME Careers, an AI data services company and subsidiary of SuperAnnotate that provides AI training data to many of the world’s largest AI companies and foundation model labs.

Responsibilities

• Create detailed prompts across Android topics and write high-quality reference answers to guide AI learning.
• Review and produce reference implementations and step-by-step reasoning for complex Android engineering problems.
• Assess AI-generated solutions for correctness, clarity, security, performance, reliability, and adherence to prompts.
• Identify issues in Jetpack Compose/UI, concurrency and threading, memory and performance, app lifecycle, networking, persistence, and build/release practices.
• Evaluate and rank AI responses to improve correctness, security, performance, and maintainability.
• Test AI outputs for inaccuracies or unsafe recommendations and validate reliability across real-world Android use cases.

Qualifications

• Bachelor’s degree or higher in Computer Science, Software Engineering, or a closely related technical field, or equivalent practical experience.
• 4+ years of professional experience building production Android apps, including work in Kotlin and ideally Java codebases.
• Expert-level proficiency in Kotlin (Kotlin 1.6+): null-safety, coroutines/flows, sealed types, generics, and idiomatic patterns.
• Strong Android fundamentals: app lifecycle, Activities/Fragments, state restoration, background execution limits, and permissions.
• Modern UI experience with Jetpack Compose and/or Views; ability to reason about recomposition, state hoisting, and UI performance.
• Concurrency expertise: coroutines, Flow, threading best practices, cancellation, and avoiding race conditions/ANRs.
• Knowledge of architecture patterns: MVVM, Clean Architecture concepts, dependency injection (Hilt/Dagger/Koin), and modularization.
• Experience with networking and data: Retrofit/OkHttp, serialization, caching, offline strategies, and persistence (Room/SQLite/DataStore).
• Experience with testing and quality: JUnit, instrumentation tests, Compose UI tests/Espresso, mocking strategies, CI/CD (Gradle, Play Console workflow).
• Security awareness: secure storage (Keystore/EncryptedSharedPreferences), auth flows, certificate pinning awareness, privacy permissions, and sensitive data handling.
• Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines.
• Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus.
• Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in complex Android code.

Additional Information

• This is a fully remote, hourly paid contractor role. There is no immediate project for this role; however, if qualified, you will be among the first experts contacted when relevant opportunities arise.
• Participation provides access to future projects available through the company's expert network.