Senior Front-End Developer

Job Descritpion of Senior Front-End Developer

6+ Years Relevant Experience

Job Description:

We are seeking an experienced Senior Front-End Developer to lead the modernization of a legacy mobile application initially built using an early version of Sencha Touch. This is a hands-on technical leadership role requiring deep expertise in front-end architecture, modern JavaScript development practices, and legacy system transformation.

Key Responsibilities:

• Lead the front-end modernization of a legacy mobile app using Sencha CMD and modern development workflows.
• Refactor and optimize legacy Sencha Touch code for improved performance, scalability, and maintainability.
• Collaborate with cross-functional teams including back-end developers, QA, and product managers to deliver a cohesive and user-friendly application.
• Handle JSON-based data integration, complex UI rendering, and dynamic content updates.
• Implement front-end best practices for debugging, testing, and version control.
• Deploy and troubleshoot applications running on Apache Tomcat.

Required Skills & Experience:

• 5+ years of front-end development experience with a focus on JavaScript frameworks.
• Strong expertise in Sencha Touch, Sencha CMD, or similar frameworks.
• Proficiency in JavaScript, HTML5, CSS3, and responsive design principles.
• Solid experience in legacy code refactoring, modernization, and performance tuning.
• Familiarity with version control systems (Git preferred).
• Strong debugging and testing skills, including experience with browser developer tools and unit testing frameworks.
• Experience working in agile, collaborative environments across different functions.

Preferred Qualifications:

• Experience with Apache Tomcat deployment and configuration.
• Background in mobile-first or hybrid app development.
• Prior work on long-lived enterprise applications and modernization initiatives.

Required Skills for Senior Front-End Developer Job

Front-End Developer

JavaScript

JSON

ExtJS

Sencha