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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mobile Engineer - Upcoming Apps Portfolio (Android & iOS) (Remote) - **Company:** MODE, LLC - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Flutter, Clean Code Principles, Java (Programming Language), A/B Testing, Artificial Intelligence, Apple IOS, Computing Platforms, App Store (IOS), Automation of Tests, Mobile Application Development, Continuous Integration, Cursor (Graphical User Interface Elements), Software Debugging, Github, Statistical Hypothesis Testing, Mobile Application Software, Release Management, Mixpanel, Mobile Analytics, TypeScript, Uikit, GitHub Copilot, ReactJS, Swiftui, Large Language Models, Concurrency, Facebook Flow, Swift (Programming Language), Firebase, Kotlin, Core Data, Integration Tests, Code Testing, Jetpack Compose, Codebase, React Native, Front End Software Development, Virtual Agents, Asynchronous Programming, Google Play, Api Design, Multiplatform, Xctest - **Published:** September 17, 2026 - **Apply:** https://www.builtincolorado.com/job/sr-mobile-engineer-upcoming-apps-portfolio-android-ios-remote/11215732?handler=ApplyRedirect ## About the Role * 5+ years of professional mobile engineering experience in an agile environment delivering native applications to end-users on both Android and iOS, with hands-on production experience using: * Android: Kotlin (and Java), Jetpack Compose, Coroutines, Flow, Dagger/Hilt, Retrofit, Room * iOS: Swift, SwiftUI and UIKit, Swift Concurrency (async/await), Combine, Core Data or equivalent * GitHub for version control and pull-request based workflows * SOLID, Clean Coding, Testing, experience with automation and instrumentation (Espresso/UI Automator, XCTest/XCUITest) * Publishing and maintaining apps on Google Play and the Apple App Store, including release management and store compliance * Experience taking ownership of an existing production system or codebase * Ability to quickly understand unfamiliar architecture, code, dependencies, and operational workflows * Strong debugging and problem-solving skills in systems you did not originally design * Comfortable working with incomplete documentation and ambiguity * Agentic AI proficiency: demonstrated day-to-day use of AI agents (e.g., Claude Code, Cursor, GitHub Copilot agents) to write and review infrastructure code, automate runbooks, and investigate incidents, with strong judgment on verifying AI-generated output before it touches production. * You have exceptional organizational and analytical skills leading to confident independent delivery, but know when and how to include others. * You have experience building large-scale systems with some technical leadership skills. * Passionate about Technology and keeping up to date with latest advancements, techniques and best practices. * Alignment with our core values: + Accountable: You take ownership of your responsibilities, demonstrating trustworthiness and self-discipline. You are consistent in your work, transparent in your actions, and communicate effectively. You follow through on commitments and strive for continuous improvement. + Action-driven: Identify what is most important, agree on scope, execute in a timely manner, and drive the greatest impact. You take initiative, roll up your sleeves, and get things done. + Caring: You genuinely care about yourself and others, our business and craft, our mission and vision, and are passionate in heart and mind. You understand the importance of our team and strive to create a positive, supportive work environment. + Curious: You focus on the 'why,' learn and expand your knowledge, explore new ideas, and generally make things better. You're a lifelong learner with a thirst for knowledge and a constant desire to improve. + Thorough: Your work is thoughtful, impactful, timely, accurate, and complete. You pay attention to detail, are meticulous, and ensure quality work and compliance. Nice to Have: * CI/CD tools such as GitHub Actions * Experience with cross-platform frameworks (Kotlin Multiplatform, Flutter, or React Native) or web front-end (React/TypeScript) * Experience integrating LLM/AI features into mobile apps (on-device or API-based), or building agentic workflows and MCP-style tooling * Experience with mobile analytics and experimentation (Mixpanel, Firebase, feature flags, A/B testing) * Experience with mobile ads and monetization SDKs, or consumer utility apps (cleaner, storage, privacy, or device optimization) ## Description We're looking for an exceptional Sr. Mobile Engineer to lead the design, development, and optimization of user-facing features across our web and mobile experiences. This is a hands-on role for someone who is comfortable entering unfamiliar codebases, quickly understanding complex systems, identifying risks, and turning them into reliable, maintainable production systems. This is a hands-on, high-impact role ideal for someone who loves building beautiful interfaces, optimizing performance, and shipping features that users can feel instantly. You'll collaborate closely with backend, product, and design to bring new capabilities to market through rapid iterations and continuous deployment. We are an AI-native company, and you'll be expected to use modern AI coding and agentic tools as a force multiplier in your everyday engineering work. Who You Are and What You'll Do * You are excited to work at the forefront of solving one of the biggest challenges. You care about your users. * You're an expert in smartphone technology and love mobile application software, equally comfortable shipping on Android and iOS. * You embrace agentic AI as a force multiplier: you use AI coding agents to plan, implement, test, and review work, and you know when to trust them and when to verify. * You value working closely with Product Management, learning directly from users about what matters to them, and developing solutions that they love. * You care deeply about the impact of your work, and measure success by the value added to users' lives. * You partner with cross-functional team members to gain additional insight into users, seek to better understand their interests and behavior as critical drivers to success. * You're excited to write high-quality, maintainable, and well-tested code. You are eager to find minimal ways to test hypotheses and validate feasibility. * You're a strong advocate for unit/integration testing and passionate about automated testing and continuously shipping to production on both app stores. * You are adaptable and comfortable moving between apps, codebases, and pods as priorities shift. ## Related Videos - [SwiftUI In Production](https://www.wearedevelopers.com/videos/134-swiftui-in-production) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Using Serious Tech for a Silly Game - How to Build an MVP with Flutter](https://www.wearedevelopers.com/videos/728-using-serious-tech-for-a-silly-game-how-to-build-an-mvp-with-flutter) - [Unsolved mysteries between Usability and Accessibility in iOS](https://www.wearedevelopers.com/videos/737-unsolved-mysteries-between-usability-and-accessibility-in-ios) - [Intro to Flutter Development](https://www.wearedevelopers.com/videos/170-intro-to-flutter-development) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [Cross Platform Mobile Development Frameworks to Use in 2025](https://www.wearedevelopers.com/magazine/404-cross-platform-mobile-development-frameworks-to-use-in-2025) - [A Guide to Choosing the Right Tools for App Developers](https://www.wearedevelopers.com/magazine/391-a-guide-to-choosing-the-right-tools-for-app-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Basic And Advanced Networking in Dart and Flutter](https://www.wearedevelopers.com/magazine/112-basic-and-advanced-networking-in-dart-and-flutter)