Mobile Application Developer

Mobile Application Developer (iOS & Android)Join a dynamic team as a Mobile Application Developer Contractor, where you’ll play a key role in building a new, innovative component of a self-directed investing platform. This is a high-impact opportunity to work onsite with a collaborative engineering team, leveraging modern development practices and AI-driven tools to deliver scalable, secure, and user-centric mobile solutions.Hours/Location/Pay/Position TypeLocation: New York, NY (Onsite – 5 days/week, W33rd & 10th Ave)Pay: $90–100/hourPosition Type: Contract (W2, no C2C)Work AuthorizationMust be authorized to work in the United States on a W2 basis without sponsorship (No C2C)What you’ll doDesign, develop, and maintain high-performance mobile applications for a self-directed investing platformCollaborate closely with developers, product teams, and stakeholders in an onsite, agile environmentBuild scalable, secure, and user-friendly features for consumer-facing financial applicationsLeverage AI tools to enhance development workflows and improve user experienceIntegrate mobile applications with backend services and APIsEnsure code quality, performance optimization, and adherence to enterprise development standardsParticipate in code reviews, testing, and continuous improvement effortsWhat we’re looking for5–8+ years of professional experience in mobile application development delivering production-grade applicationsStrong expertise in:Swift (iOS) ORKotlin (Android)Experience building consumer-facing applications at scale, ideally within enterprise environmentsStrong understanding of mobile architecture, performance optimization, and development best practicesExperience working in fast-paced, collaborative, and highly technical teamsAbility to work onsite 5 days per week in New York CityStrong communication skills and ability to work cross-functionallyNice to haveExperience developing applications within financial services or investment platformsExperience integrating with RESTful APIs and backend systemsFamiliarity with CI/CD pipelines, testing frameworks, and release managementExposure to AI/ML tools or AI-assisted development environmentsWho Should Apply?This role is open for two hires: 1 iOS Developer and 1 Android DeveloperCandidates should have deep expertise in a single platform (Swift or Kotlin) rather than bothDevelopers who have experience building enterprise-scale, high-impact mobile applicationsIndividuals comfortable working onsite in a highly collaborative, fast-paced environmentCandidates looking to contribute to a greenfield build with strong visibility and impactAbout UsThe CSI Companies is a leading staffing and recruiting firm with over 25 years of experience connecting top talent with exceptional opportunities across healthcare, technology, and professional services. We are committed to delivering results-driven solutions while maintaining a people-first approach for both our clients and candidates.Benefits OfferedWeekly payMedical, dental, and vision coverageVoluntary Life/AD&D insuranceShort-term and long-term disability coverage401(k) planPaid training and certifications (as applicable)