EarnIn - Senior Mobile Engineer (Android)
Requirements
• Bachelor's (or higher, e.g., MS or PhD) in Computer Science or a related technical field or equivalent technical experience. • 4+ years of industry experience building, shipping, and maintaining mobile applications at scale, with a strong focus on Android. • A growth mindset: you care about acquisition, activation, engagement, and retention outcomes, are comfortable with ambiguity, and can take a high-level idea and shape it into a product spec. • Strong ownership — you can take a project from spec to launch on your own, with good judgment about when to ask for input and when to just move. • Willingness and curiosity to work across stacks — Android-strong, but ready to contribute on iOS, backend, or web rather than staying boxed into one platform. • Very comfortable with AI-native development workflows — using AI coding tools and agents as a core part of how you design, build, and ship. • Genuine interest in growth loops, experimentation, and metrics-driven product development. • Strong communication and cross-functional collaboration skills — you can engage product, design, marketing, and analytics partners as an equal, not just a downstream implementer. • Fluency in Kotlin, with a strong grasp of reactive & functional paradigms (Coroutines/Flow, RxJava). • Proven experience with modern Android app architectures (MVVM, MVI, MVP, Clean Architecture) and Jetpack components. • Deep understanding of Android UI frameworks, including XML layouts and Jetpack Compose. • Hands-on knowledge of software engineering best practices across the full SDLC: coding standards, code reviews, Git workflows, CI/CD pipelines, automated testing, and mobile release operations. • Experience using AI-assisted development tools (e.g., GitHub Copilot, Cursor, ChatGPT, or similar tools) as part of your software development workflow? • Experience with mobile analytics and experimentation tooling (e.g., Amplitude, feature flags, A/B testing frameworks) is a strong plus. • Familiarity with iOS development, backend development, or web (React/TypeScript) is a significant plus. • A Note on AI in the Hiring Process: EarnIn may use Artificial Intelligence (AI)-powered tools during the hiring process, including tools that generate summaries or notes for interviewers, review resumes, assist with scheduling, or help identify themes across candidate responses and profiles for a given role. Final hiring decisions are made by human interviewers and hiring managers. If you have any concerns about the use of AI in our hiring process, please connect with your recruiter. With your consent, EarnIn may use AI tools to help transcribe or summarize interviews. Recordings are treated as confidential candidate data and are accessible only to authorized hiring personnel. Declining to be recorded will not negatively affect your candidacy or evaluation.
Responsibilities
• Partner with product, design, and analytics from problem definition onward — shaping what we build and why, including writing up the spec, not just implementing finished ones. • Build and refine the systems that drive acquisition, activation, engagement, and retention — deciding what to test, when to ship it, and how to measure it. • Work across the stack as needed — owning Android, but contributing to iOS, backend, or web (React/TypeScript) when that's where the problem lives. • Work in an AI-native way — using AI coding tools and agents for cross-stack code generation, spec-driven development, and faster iteration across Android, iOS, backend, and web. • Translate customer pain points and business goals into technical solutions, and push back when the data suggests a better path. • Run and instrument experiments (A/B tests, funnels, activation flows, retention loops) to validate that what we ship actually moves growth metrics — and kill what doesn't. • Develop a scalable architecture that enables the organization to remain agile as it expands. • Drive decisions on the strategies and methodologies used in app development and testing at EarnIn. • Ship iteratively — prioritize ruthlessly, scope MVPs, and balance speed against quality to get value to CMs faster. • Create Unit and Automation (UI) Tests to ensure new code doesn't break existing features and meets product requirements. • Own your projects end-to-end — from spec through launch and iteration — with minimal oversight.
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