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I am a results-driven Frontend Developer and UI/UX Strategist focused on high-conversion architecture and secure web performance. I specialize in React.js environments and Bootstrap 5, with a background in applying usability heuristics to optimize user journeys and maximize lead capture. I craft responsive, accessible interfaces and collaborate across teams to align product goals with data-driven insights. My experience includes migrating legacy jQuery to modular React/TypeScript, implementing CRO-driven UI updates, and enabling robust frontend communication with Java-based microservices.…I am a results-driven Frontend Developer and UI/UX Strategist focused on high-conversion architecture and secure web performance. I specialize in React.js environments and Bootstrap 5, with a background in applying usability heuristics to optimize user journeys and maximize lead capture. I craft responsive, accessible interfaces and collaborate across teams to align product goals with data-driven insights. My experience includes migrating legacy jQuery to modular React/TypeScript, implementing CRO-driven UI updates, and enabling robust frontend communication with Java-based microservices.

Sean Lim Yuan Jin

Front-End Developer, UI Designer, Web Developer, +2

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I am a results-driven Frontend Developer and UI/UX Strategist focused on high-conversion architecture and secure web performance. I specialize in React.js environments and Bootstrap 5, with a background in applying usability heuristics to optimize user journeys and maximize lead capture. I craft responsive, accessible interfaces and collaborate across teams to align product goals with data-driven insights. My experience includes migrating legacy jQuery to modular React/TypeScript, implementing CRO-driven UI updates, and enabling robust frontend communication with Java-based microservices.…I am a results-driven Frontend Developer and UI/UX Strategist focused on high-conversion architecture and secure web performance. I specialize in React.js environments and Bootstrap 5, with a background in applying usability heuristics to optimize user journeys and maximize lead capture. I craft responsive, accessible interfaces and collaborate across teams to align product goals with data-driven insights. My experience includes migrating legacy jQuery to modular React/TypeScript, implementing CRO-driven UI updates, and enabling robust frontend communication with Java-based microservices.

Available to hire

I am a results-driven Frontend Developer and UI/UX Strategist focused on high-conversion architecture and secure web performance. I specialize in React.js environments and Bootstrap 5, with a background in applying usability heuristics to optimize user journeys and maximize lead capture.

I craft responsive, accessible interfaces and collaborate across teams to align product goals with data-driven insights. My experience includes migrating legacy jQuery to modular React/TypeScript, implementing CRO-driven UI updates, and enabling robust frontend communication with Java-based microservices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Frontend Developer at Kyndryl (SingHealth EUP)

February 1, 2025 - Present

Led migration of legacy jQuery logic to modular React.js/TypeScript architecture for Conversion Rate Optimization (CRO). Delivered a high-performance UI/UX refresh with 100% responsiveness by refactoring Bootstrap 5 components and integrating Google Analytics tracking pixels for behavior monitoring. Streamlined submission workflows by adding rich-text editing tools and prototyping AI-accelerated features for professional users. Implemented robust API consumption layers and collaborated on Node.js middleware to ensure seamless frontend integration with Java-based microservices.

Cybersecurity Training and Internship at Oeson Learning

August 1, 2024 - November 1, 2024

Enhanced application security for Lead Generation platforms through hands-on cybersecurity training, including penetration testing with Burp Suite and OWASP ZAP to identify high-risk vulnerabilities in React-based frontend environments. Improved incident response readiness by establishing malware analysis and network scanning frameworks and conducting simulated exercises.

Senior Administrative Assistant at Chirotherapy

February 1, 2023 - June 1, 2024

Streamlined patient Lead Capture and clinic workflow by coordinating logistics and providing comprehensive administrative support for high-volume client intake, contributing to operational efficiency.