Senior UI Engineer - React/TypeScript, AG Grid, Onsite NYC

JMS Technical Solutions; New York (NY); On-site; USD 120,000 - 125,000; Full time

Job summary

JMS Technical Solutions is seeking a Senior UI/Frontend Developer for an on-site, full-time role in New York, NY. You will lead frontend efforts, building complex UI with React/TypeScript and AG Grid in a data-heavy environment.

Responsibilities include maintaining a shared UI component library, optimizing performance, and guiding junior engineers. You will engage with clients, provide estimates, and contribute to architectural decisions for frontend solutions.

Qualifications

• 5+ years of professional JavaScript/TypeScript development in enterprise-level domains.
• Proficiency with React and modern JavaScript frameworks.
• Deep experience with AG Grid in production applications; complex configurations and integrations.
• Proficiency in TypeScript and modern ES6+ features.
• Working knowledge of DevOps practices for CI/CD pipelines and deployment automation.
• Experience building and maintaining reusable UI component libraries at scale.
• Strong understanding of responsive design, accessibility, and web performance.

Responsibilities

• Build and maintain complex, data-heavy UI features using React and TypeScript in a 100% frontend-focused capacity.
• Work extensively with AG Grid to build, optimize, and maintain grid-based data views and displays.
• Create and maintain calculator functionality enabling users to run simulations with responsive interfaces.
• Maintain a comprehensive UI component library used across dashboards and calculator functionality.
• Manage CI/CD pipelines for frontend codebases with DevOps practices for deployment automation.
• Collaborate with clients to architect frontend solutions for real-world challenges.
• Provide technical estimates and milestones for frontend features and stories.
• Mentor junior engineers and contribute to client growth via technical interviews.

Skills

JavaScript/TypeScript

React

AG Grid

UI component library

DevOps

Responsive design

Accessibility (a11y)

Consulting/client-facing

Tools

Webpack/Vite

CI/CD tooling

Job description

JMS Technical Solutions is seeking a Senior UI/Frontend Developer for an on-site, full-time role in New York, NY. You will lead frontend efforts, building complex UI with React/TypeScript and AG Grid in a data-heavy environment.

Responsibilities include maintaining a shared UI component library, optimizing performance, and guiding junior engineers. You will engage with clients, provide estimates, and contribute to architectural decisions for frontend solutions.