Junior Android SDK Engineer

LoopMe is a software company that builds software products and services for the advertising industry. LoopMe was founded in 2012 and today is a global company with 300+ employees. As the global leader in brand performance, we use AI-powered technology to redefine brand advertising for the digital and app ecosystem.

As a Junior Android SDK Engineer, you will begin your career in mobile advertising technology, contributing to SDKs that help gaming and app developers monetize their applications through advertising revenue. You will work alongside experienced engineers who will mentor you as you develop expertise in SDK architecture, performance optimization, and the mobile advertising ecosystem.

You will be part of our Android efforts and will work closely with our iOS development team, QA team, and senior engineers who will guide your professional growth.

Key Skills & Experience:

Required:

• Bachelor's degree in Software Engineering, Computer Science, or a related technical field

• Strong English communication skills, both spoken and written (B2-C1 level) — essential for daily collaboration with our international team across USA, Poland, and Ukraine

• Experience with AI-assisted development tools (e.g., GitHub Copilot, Claude Code) to accelerate coding workflows, learning, and problem-solving

• ~2 years of commercial or substantial personal project experience with Android development

• Foundational knowledge of Kotlin and Java

• Understanding of core Android concepts:

  • Activities, Fragments, Services

  • Application lifecycle and state management

  • Basic UI development (XML layouts, Jetpack Compose basics)

• Familiarity with Android Studio and Gradle build system

• Basic understanding of RESTful APIs and JSON data handling

• Experience with Git version control

Nice-to-Have:

• Exposure to MVVM, MVP, or Clean Architecture patterns

• Basic unit testing knowledge (JUnit)

• Published apps on Google Play Store

• Familiarity with GitHub Actions or CI/CD concepts

• Knowledge of Jetpack Compose

• Understanding of networking libraries (Retrofit, OkHttp)

• Any exposure to iOS/Swift development

Key Responsibilities:

• Learn and contribute to our advertising-focused SDKs under the guidance of staff-level engineers

• Assist in building and maintaining test apps used by developers and QA to validate SDKs

• Continuously learn and improve Claude Code workflows to enhance code quality, productivity, and efficiency in Android SDK development

• Write clean, efficient, and well-documented code following team standards

• Participate in code reviews to learn best practices and provide peer feedback

• Help investigate and debug creative rendering issues with support from the team

• Collaborate with Product Manager, Engineering Manager, and senior developers on feature implementation

• Write and maintain unit tests for SDK components

• Contribute to technical documentation for SDK integration

• Stay updated with Android development trends and share learnings with the team

What you will learn:

• SDK architecture and design principles for mobile advertising

• Performance optimization techniques (memory profiling, startup time, battery usage)

• Integration patterns with third-party ad networks and mediation platforms

• Master Claude Code as a code assist tool to boost development speed and code quality

• WebView and HTML5 content rendering in native Android apps

• Cross-platform collaboration with iOS teams

• CI/CD workflows and automated testing for SDK releases

• Real-world experience with code that reaches millions of users

Benefits:

• International work environment

• Flexible working schedule with a hybrid working model (3 days from the office)

• Annual performance bonus (up to 8%)

• One month of workation (work from any location worldwide for one month)

• Multikafeteria