Sr. UI/UX React Native Mobile Developer

Sans

New York, NY

Full Time

Senior

11 days ago

Job Description

About the Role

The role is to re-engineer the portal for the participants, which currently serves over 5 million participants globally. The system needs an entire rewrite of both the underlying architecture and the UI/UX. The project involves rebuilding the employee/participant portal for a major financial institution to improve scalability, performance, and user experience, with potential migration to Azure. The position offers a greenfield opportunity to architect and implement a modern, mobile-responsive, cross-platform solution from the ground up, supporting iOS, Android, and tablets. The candidate will work in-person three days a week at 29th Street and Park Avenue in NYC/NJ, with payment on a W2 basis only, and must be local candidates.

Key Responsibilities

Lead the design and development of a next-generation React-based portal for millions of participants.
Re-engineer both UI/UX and system architecture to handle significantly increased transaction volumes.
Collaborate with designers and stakeholders to deliver a seamless and intuitive user experience.
Develop mobile-responsive applications that perform well on iPhones, Android devices, and tablets.
Potentially migrate or integrate with Microsoft Azure cloud infrastructure.
Engage directly with business stakeholders, including wealth management and capital markets teams, to gather requirements and deliver features.
Operate as a self-sufficient, proactive individual contributor who can own and drive the project from inception to delivery.

Requirements

7+ years of professional experience in front-end development, with a strong emphasis on React.js.
Expertise in building complex, mobile-friendly UIs using modern JavaScript/TypeScript and React Native or responsive design frameworks.
Deep understanding of web architecture, performance optimization, and scalable frontend systems.
Proven track record of delivering large-scale projects in financial services, particularly in wealth management or capital markets.
Strong knowledge of UI/UX design principles with hands-on experience in delivering exceptional digital experiences.
Experience integrating with backend APIs and cloud platforms (Azure preferred).
Excellent communication skills and the ability to work directly with business teams and stakeholders.
Highly motivated, self-starter with a track record of delivering high-quality products independently.

Nice to Have

Experience with Azure DevOps or similar CI/CD pipelines.
Prior involvement in building systems used by tens of thousands or millions of users.
Familiarity with accessibility standards (WCAG, ADA) and internationalization/localization.

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