Senior User Interface Engineer

NJF Global Holdings Ltd; New York (NY); On-site; USD 110,000 - 180,000; Full time

Job summary

NJF Global Holdings Ltd in New York is seeking a UI Engineer to own frontend applications across a fast-paced tech environment. You will build intuitive, high-performance interfaces using React and TypeScript, collaborating with engineers and business stakeholders.

The role emphasizes product-focused development, scalable architecture, and delivering responsive experiences. You should have strong React/TypeScript skills, 3+ years of experience, and a passion for solving complex UI challenges in

Qualifications

• Bachelor's degree in CS or a related STEM field.
• 3+ years of professional software engineering experience.
• Experience building production frontend applications with emphasis on usability and performance.
• Strong understanding of frontend architecture and component design.
• Experience integrating frontends with backend APIs or distributed systems.

Responsibilities

• Own the development and ongoing improvement of key frontend applications supporting complex business workflows.
• Build scalable, high-performance user interfaces using React and TypeScript.
• Translate business requirements into intuitive and efficient user experiences.
• Integrate frontend applications with backend services and distributed systems, across the stack.
• Develop interfaces that present complex data clearly and respond to changing information.
• Improve frontend architecture and reusable components for long-term maintainability.
• Identify and resolve performance bottlenecks across rendering and state management.
• Collaborate with engineers and business stakeholders to deliver new functionality and improvements.
• Take ownership of technical decisions while maintaining code quality and testing standards.

Skills

React

TypeScript

Frontend architecture

UI development

Education

Bachelor's degree in Computer Science or related STEM field

Job description

Total compensation: flexible – based on experience and seniority

This is a highly product-focused engineering environment where frontend engineers work closely with business users to solve complex workflow challenges through modern, data-rich applications. The focus is on building intuitive, high-performance interfaces that make complex information easier to understand and improve how users interact with critical business systems.

As a UI Engineer, you will take ownership of frontend applications used across a sophisticated, fast-paced technology environment. Working closely with engineers and business stakeholders, you will build and enhance applications that support complex workflows and data-driven decision-making.

You will have the opportunity to shape frontend architecture while delivering reliable, responsive user experiences. The role is suited to an engineer who combines strong React and TypeScript expertise with a genuine interest in product development and solving challenging engineering problems.

Responsibilities

• Own the development and ongoing improvement of key frontend applications supporting complex business workflows.
• Build scalable, high-performance user interfaces using React and TypeScript.
• Translate business requirements into intuitive and efficient user experiences.
• Integrate frontend applications with backend services and distributed systems, working across the stack where needed.
• Develop interfaces that present complex data clearly and respond effectively to changing information.
• Improve frontend architecture and reusable components to support long-term maintainability.
• Identify and resolve performance bottlenecks across rendering and application state management.
• Collaborate closely with engineers and business stakeholders to deliver new functionality and improve existing applications.
• Take ownership of technical decisions while maintaining high standards for code quality and testing.

Requirements

• Strong commercial experience building production applications with **React and TypeScript**.
• Bachelor's degree in Computer Science or another STEM discipline.
• 3+ years of professional software engineering experience.
• Experience building complex, production-grade frontend applications with a strong focus on usability and performance.
• Strong understanding of frontend architecture and component design, with experience managing application state.
• Experience integrating user interfaces with backend APIs or distributed systems.
• Ability to diagnose performance issues and build maintainable, well-tested software.
• Strong problem-solving skills and the ability to take ownership of projects from initial requirements through to delivery.
• Comfortable working closely with engineers and business users in a fast-paced environment.
• A product-focused mindset with strong attention to detail and a genuine interest in building high-quality user experiences.