Mobile Application Developer

Mobile Application Developer

Company: 303 Software
Location: Denver, CO
Estimated Pay Range: $85,000–$120,000 per year
Job Type: Full-time (confirm with employer)

Job Summary

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.

In this role, you will collaborate with designers, software engineers, and project stakeholders to transform product requirements into functional mobile applications. You will contribute to development planning, implementation, testing, deployment, and ongoing maintenance while following established quality and security standards.

Key Responsibilities

• 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.

Requirements

• 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.

About the Company

303 Software is a Denver-area software development company associated with custom software engineering and digital product development. Software development firms in this sector help organizations plan, build, and maintain applications tailored to their operational needs and customer experiences.

Before publishing, verify the company's current business profile, services, and Denver-area presence so that the company description accurately reflects the employer.

Compensation

The estimated annual salary range of $85,000–$120,000 is provided for drafting purposes only. It is not a verified salary range for a current 303 Software vacancy. Actual compensation depends on experience, technical specialization, responsibilities, and employment location.

Before publishing: Verify the employer's authorization, the availability of the Mobile Application Developer position in Denver, CO, and the actual compensation and employment terms.

Pay: $85,000.00 - $120,000.00 per year

Benefits:

• Flexible schedule
• Relocation assistance

Work Location: In person