Senior Frontend Developer - Angular / React / JavaScript / TypeScript

Location: Remote (Working Hours: CST Time Zone)
Type: Long-term Contract
Start Date: ASAP
Client Domain: Smart Devices

Sphere is looking for Senior Frontend Developer to join a forward-thinking client developing smart device solutions.

Candidates must be available to collaborate during CST working hours.

Responsibilities

• Develop application using Angular (must-have) and React

• Write scalable, well-tested TypeScript and JavaScript code

• Implement responsive design, smooth UI interactions, and dynamic components

• Collaborate closely with cross-functional teams to translate product vision into high-quality software

• Work with backend teams to integrate APIs and ensure seamless user experiences

• Maintain design consistency by contributing to shared UI libraries and component systems

• Review code, mentor teammates, and champion frontend best practices

Requirements

• 5+ years of experience in frontend development with a strong focus on Angular

• Experience with React and an understanding of component-based architecture

• Experience with TypeScript, JavaScript (ES6+), HTML5, and CSS3

• Experience building responsive, mobile-friendly user interfaces

• Strong API integration experience (RESTful services)

• Familiar with Git workflows, Agile methodologies, and modern frontend tooling (Webpack, ESLint, etc.)

• Comfortable working remotely and aligned with CST time zone

Nice to Have

• Background working with IoT, smart devices, or connected hardware platforms

• Experience with Mendix/OutSystems