> Markdown version of [/jobs/ext/4366665-mobile-application-developer](https://www.wearedevelopers.com/jobs/ext/4366665-mobile-application-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mobile Application Developer - **Company:** 303 Software, Incorporated - **Location:** Denver, CO, United States - **Salary:** $85,000.0 - $120,000.0 - **Contract:** Permanent contract - **Skills:** Flutter, Clean Code Principles, Java (Programming Language), JavaScript (Programming Language), Agile Methodology, Android Software Development, Apple IOS, Application Performance Management, Application Testing, App Store (IOS), User Authentication, Automation of Tests, Client Server Models, Mobile Application Development, Code Review, Databases, Continuous Integration, Data Security, Software Debugging, Push Technology, Mobile Application Software, Performance Tuning, Release Management, Mobile Analytics, Responsive Web Design, Secure Coding, Mobile Security, Software Engineering, TypeScript, Data Storage Technologies, Software Troubleshooting, Swift (Programming Language), Firebase, Backend, Git, Kotlin, Dart, React Native, Google Play, Restful APIs, Programming Languages - **Published:** October 19, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=fec63ed616fe4f78 ## About the Role * Experience in mobile application development or software engineering. * Familiarity with iOS or Android development environments. * Knowledge of Swift, Kotlin, Java, Dart, or JavaScript/TypeScript. * Experience with a mobile framework such as React Native or Flutter, or native development tools. * Understanding of REST APIs, data storage, and client-server architecture. * Familiarity with Git and collaborative development workflows. * Knowledge of debugging, application testing, and performance optimization. * Strong analytical, communication, and problem-solving skills. * Ability to collaborate with cross-functional teams and meet project deadlines. Preferred Skills * Experience publishing or maintaining applications in the Apple App Store or Google Play Store. * Familiarity with Firebase, push notifications, and mobile analytics. * Knowledge of mobile security, authentication, and secure data storage. * Experience with automated testing and continuous integration workflows. * Understanding of responsive design, accessibility, and mobile user experience principles. * Familiarity with Agile development and project management tools. ## Description 303 Software is seeking a skilled Mobile Application Developer to design, build, test, and maintain mobile applications that deliver reliable and intuitive user experiences. The ideal candidate will have a strong foundation in software engineering, mobile development frameworks, API integration, and application performance optimization., * Design, develop, and maintain mobile applications for iOS and Android platforms. * Build responsive, accessible, and user-friendly mobile interfaces. * Implement application features using appropriate programming languages and frameworks. * Integrate REST APIs, databases, authentication services, and third-party tools. * Troubleshoot software defects and resolve performance and compatibility issues. * Write clean, reusable, testable, and maintainable code. * Perform unit, integration, and functional testing before application releases. * Collaborate with designers and backend developers to deliver cohesive product experiences. * Optimize application speed, stability, responsiveness, and resource usage. * Participate in code reviews and maintain technical documentation. * Support application releases, updates, and ongoing maintenance. * Follow secure development practices and mobile platform guidelines.