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I'm Stefan, a Senior Software Engineer focused on delivering high-performance, scalable web applications with a strong emphasis on usability, design precision, and internationalization. I specialize in frontend architectures using HTML5, CSS3, JavaScript, TypeScript, and React, and I have a proven track record of translating complex UI designs into responsive, multilingual interfaces, including Traditional Chinese. I thrive in Agile teams, own frontend quality from concept to production, optimize Core Web Vitals, and collaborate closely with designers and backend engineers to deliver reliable, production-ready solutions. I also mentor colleagues, advocate for accessible and SEO-friendly experiences, and continuously refine performance and cross-browser compatibility across devices.…I'm Stefan, a Senior Software Engineer focused on delivering high-performance, scalable web applications with a strong emphasis on usability, design precision, and internationalization. I specialize in frontend architectures using HTML5, CSS3, JavaScript, TypeScript, and React, and I have a proven track record of translating complex UI designs into responsive, multilingual interfaces, including Traditional Chinese. I thrive in Agile teams, own frontend quality from concept to production, optimize Core Web Vitals, and collaborate closely with designers and backend engineers to deliver reliable, production-ready solutions. I also mentor colleagues, advocate for accessible and SEO-friendly experiences, and continuously refine performance and cross-browser compatibility across devices.

Stefan Kai Belgrade

Front-End Developer, Web Developer, UI Designer, +5

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I'm Stefan, a Senior Software Engineer focused on delivering high-performance, scalable web applications with a strong emphasis on usability, design precision, and internationalization. I specialize in frontend architectures using HTML5, CSS3, JavaScript, TypeScript, and React, and I have a proven track record of translating complex UI designs into responsive, multilingual interfaces, including Traditional Chinese. I thrive in Agile teams, own frontend quality from concept to production, optimize Core Web Vitals, and collaborate closely with designers and backend engineers to deliver reliable, production-ready solutions. I also mentor colleagues, advocate for accessible and SEO-friendly experiences, and continuously refine performance and cross-browser compatibility across devices.…I'm Stefan, a Senior Software Engineer focused on delivering high-performance, scalable web applications with a strong emphasis on usability, design precision, and internationalization. I specialize in frontend architectures using HTML5, CSS3, JavaScript, TypeScript, and React, and I have a proven track record of translating complex UI designs into responsive, multilingual interfaces, including Traditional Chinese. I thrive in Agile teams, own frontend quality from concept to production, optimize Core Web Vitals, and collaborate closely with designers and backend engineers to deliver reliable, production-ready solutions. I also mentor colleagues, advocate for accessible and SEO-friendly experiences, and continuously refine performance and cross-browser compatibility across devices.

Available to hire

I’m Stefan, a Senior Software Engineer focused on delivering high-performance, scalable web applications with a strong emphasis on usability, design precision, and internationalization. I specialize in frontend architectures using HTML5, CSS3, JavaScript, TypeScript, and React, and I have a proven track record of translating complex UI designs into responsive, multilingual interfaces, including Traditional Chinese.

I thrive in Agile teams, own frontend quality from concept to production, optimize Core Web Vitals, and collaborate closely with designers and backend engineers to deliver reliable, production-ready solutions. I also mentor colleagues, advocate for accessible and SEO-friendly experiences, and continuously refine performance and cross-browser compatibility across devices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Chinese

Advanced

Work Experience

Senior Frontend Engineer at MediGroup

May 1, 2023 - Present

Owned frontend architecture for responsive healthcare platforms, ensuring scalability and maintainability across multiple products. Engineered reusable React/TypeScript component libraries, implemented multilingual interfaces (including Traditional Chinese), optimized Core Web Vitals, and ensured cross-browser compatibility and accessibility across devices. Collaborated with designers, backend engineers, and product teams to deliver high-quality UI and deployment documentation.

Frontend Engineer at IceFyre

November 1, 2018 - April 1, 2023

Led frontend development for high-traffic web applications with a focus on responsiveness and performance. Translated business requirements into scalable UI solutions, replicated complex design systems, implemented multilingual support (Traditional Chinese), improved SEO through semantic HTML and performance optimization, and automated deployments via CI/CD pipelines.

Frontend Developer at HTEC Group

September 1, 2016 - October 1, 2018

Developed responsive web applications, collaborated with UI/UX teams to implement visually accurate interfaces, integrated REST APIs for dynamic experiences, ensured cross-browser compatibility, and improved page performance by minimizing render-blocking resources.

Web Developer at Serbia Innovator

August 1, 2014 - August 1, 2016

Built responsive websites with modern standards, collaborated with senior developers to implement frontend features, ensured multilingual layouts and content adaptations, and performed debugging/testing across multiple devices to maintain high quality and consistency.