iOS Developer

Quantum Technologies. LLC; McLean (VA); On-site; USD 90,000 - 130,000; Full time

Job summary

Quantum Technologies. LLC in McLean, VA is seeking a Mobile Application Developer to design, build, and maintain high-quality mobile apps for Android and iOS. You will collaborate with product, design, and backend teams to deliver secure, performant experiences across devices.

The role requires strong Kotlin/Java for Android or Swift/Obj-C for iOS, with experience in app architecture, debugging, and API consumption. Opportunity to contribute to CI/CD, testing, and security-focused development.

Qualifications

• Proven experience building mobile apps for Android and/or iOS.
• Experience with RESTful APIs and Agile teams.
• Strong debugging, performance optimization, and architecture skills.

Responsibilities

• Design, develop, test, and maintain mobile apps for Android and/or iOS.
• Collaborate with product, design, and backend teams to release features.
• Integrate APIs and ensure reliable data handling and performance.
• Participate in code reviews and follow engineering best practices.

Skills

Android Development

iOS Development

API Integration

Tools

Android Studio

Xcode

CI/CD

Job description

We are looking for a Mobile Application Developer (Android and/or iOS) to design, build, and maintain high-quality mobile apps. You’ll partner with product, design, and backend teams to deliver secure, performant, user-friendly experiences across mobile devices.

Responsibilities

Design, develop, test, and maintain mobile applications for Android and/or iOS.

Collaborate with cross-functional teams to define, design, and ship new features on a regular release cadence.

Integrate APIs and external data sources; ensure reliable data handling and app performance.

Troubleshoot, debug, and improve existing functionality; participate in code reviews and follow engineering best practices.

Required qualifications

Strong mobile development experience: Android (Kotlin/Java) and/or iOS (Swift/Objective-C).

Experience with mobile app architecture, debugging, and performance optimization.

Familiarity with consuming RESTful APIs and collaborating in Agile teams.

Preferred skills

Testing and quality practices: unit/integration testing and CI for stable releases.

Android: Android Studio, Android SDK, lifecycle components; iOS: key iOS frameworks and App Store readiness.

Experience building secure apps (authentication, secure storage, privacy-minded implementation)

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.