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Senior Mobile Developer

Job

ZennSoft

East Elmhurst, NY (In Person)

Full-Time

Posted 5 days ago (Updated 3 days ago) • Actively hiring

Expires 7/25/2026

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Job Description

Title:

Senior Mobile Developer (iOS & Android)

Location :

East Elmhurst, NY (Onsite)

Duration :

Contract In-person interview is mandatory

Normal Business Days/Hours:

Monday Friday (9:00am - 5:00pm includes one-hour unpaid lunch) - 35 hours work week. 35 hours work week About the Role The New York City Department of Correction is seeking a Senior Mobile App Developer for the Information Technology Division to build enterprise-grade mobile and web applications across native Android, native iOS, React Native, and ReactJS. This role is ideal for a senior engineer with strong mobile development experience, enterprise release knowledge, and secure authentication expertise. Responsibilities Design, build, test, and maintain native Android and iOS applications. Develop cross-platform mobile features using React Native when appropriate. Build responsive web experiences using ReactJS. Integrate applications with backend services and RESTful APIs. Collaborate with product, UX, backend, security, DevOps, and enterprise IT teams. Participate in architecture planning, code reviews, troubleshooting, and production support. Improve development workflows using CI/CD, automation, and responsible AI-assisted coding practices. Required Qualifications 7+ years of software development experience, with significant experience in mobile application development. Strong native Android experience using Java and/or Kotlin. Strong native iOS experience using Swift and/or Objective-C. Experience with React Native, ReactJS, and responsive web development. Familiarity with MDM platforms, Workspace ONE, enterprise app distribution, and public app store releases. Experience with GitHub, Azure DevOps, CI/CD pipelines, and release automation. Strong understanding of application security, secure storage, API security, and authentication flows. Experience with OAuth 2.0, OpenID Connect, SSO, MFA, and token-based authentication. Strong understanding of RESTful API standards, API integration patterns, and error handling. Familiarity with Vibe Coding, AI-assisted development tools, and best practices for reviewing and validating generated code.