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Senior Mobile App Developer

Job in West Falls Church, Fairfax County, Virginia, USA
Listing for: Kastle Systems International, LLC
Full Time position
Listed on 2026-05-11
Job specializations:
  • Software Development
    Software Engineer, Full Stack Developer, App Developer - Mobile/Web
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: West Falls Church

Overview

At Check Video, we are transforming video security with our AI-enabled cameras. Thousands of customers depend on us every day for mission-critical security, delivered through cloud infrastructure. This is a hybrid position out of Falls Church, VA that offers an opportunity to work on the cutting edge of technology with a great team and make meaningful contribution every single day. We are looking for an experienced Software Engineer responsible for software architecture, design, development & testing of Check Video’s flagship product assets.

Additional duties include writing high performance, scalable & secure software to meet customer demands.

Responsibilities
  • Design, develop, test and deploy native iOS and Android applications.
  • Translate Figma designs into responsive mobile interfaces using Native Script and CSS/SCSS.
  • Integrate mobile apps with backend services using RESTful APIs and OAuth2/JWT.
  • Maintain code quality with clean code and unit testing.
  • Optimize app performance for memory & battery consumption in mobile.
  • Handle app lifecycle from design, testing, App Store/Google Play deployment and support.
  • Scale and tune production software for high performance.
Qualifications
  • Education:

    Bachelor’s degree required;
    Advanced degree preferred.
  • Experience:

    5+ years of developing software for mass market products.
  • Frameworks:
    Angular (Components, Services, Signals, RxJS, NgRx), React, Redux, Native Script, Native Script CLI, Vue.js, Type Script, Swift, ObjC, Java, Kotlin, Coroutines, Jetpack, Retrofit, Room.
  • Styling: CSS and Native Script-specific styling.
  • Tools:
    Visual Studio, Android Studio, and Xcode for platform-specific builds.
  • Testing:
    Jest, Karma, Jasmine.
  • Source code control systems:
    Git, Bitbucket.
  • Databases: SQLite, RxDB, Firestore, Couchbase Lite.
  • Operations:
    Strong skills in troubleshooting production issues.
  • Helpful but not required:
    Experience with media codecs and streaming protocols; prior experience with video processing.
Equal Opportunity Statement

At Kastle, we believe that diversity makes us stronger - at work and in the world. Kastle Systems International, LLC is an Equal Opportunity / Affluent Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, age, protected veteran status, marital status, pregnancy or any other basis protected by applicable federal or state laws.

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Position Requirements
10+ Years work experience
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