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I am a Senior UI/UX Designer and Front-End Developer with 5+ years of experience delivering scalable, high-performance web applications for regulated and fast-paced environments. I translate complex business and compliance requirements into intuitive, accessible, and visually compelling interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks. I am known for driving clean design systems, improving usability and adoption, and partnering cross-functionally to deliver production-ready solutions that balance user experience, performance, and business outcomes.…I am a Senior UI/UX Designer and Front-End Developer with 5+ years of experience delivering scalable, high-performance web applications for regulated and fast-paced environments. I translate complex business and compliance requirements into intuitive, accessible, and visually compelling interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks. I am known for driving clean design systems, improving usability and adoption, and partnering cross-functionally to deliver production-ready solutions that balance user experience, performance, and business outcomes.

Gizem Karadag

Front-End Developer, UI Designer, UX Designer, +4

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I am a Senior UI/UX Designer and Front-End Developer with 5+ years of experience delivering scalable, high-performance web applications for regulated and fast-paced environments. I translate complex business and compliance requirements into intuitive, accessible, and visually compelling interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks. I am known for driving clean design systems, improving usability and adoption, and partnering cross-functionally to deliver production-ready solutions that balance user experience, performance, and business outcomes.…I am a Senior UI/UX Designer and Front-End Developer with 5+ years of experience delivering scalable, high-performance web applications for regulated and fast-paced environments. I translate complex business and compliance requirements into intuitive, accessible, and visually compelling interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks. I am known for driving clean design systems, improving usability and adoption, and partnering cross-functionally to deliver production-ready solutions that balance user experience, performance, and business outcomes.

Available to hire

I am a Senior UI/UX Designer and Front-End Developer with 5+ years of experience delivering scalable, high-performance web applications for regulated and fast-paced environments. I translate complex business and compliance requirements into intuitive, accessible, and visually compelling interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks.

I am known for driving clean design systems, improving usability and adoption, and partnering cross-functionally to deliver production-ready solutions that balance user experience, performance, and business outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Turkish

Advanced

Work Experience

Senior UI/UX Designer at UBC (United BioSource LLC)

September 1, 2022 - June 19, 2024

Utilized HTML, Bootstrap, CSS, SCSS, JavaScript, and Photoshop to create intuitive and visually engaging user interfaces. Collaborated cross-functionally using Figma design systems and real-time feedback tools to streamline product development. Developed high-resolution mockups for client reviews and FDA submissions ensuring compliance with regulatory standards. Documented design decisions and communicated effectively to team members and stakeholders. Worked with Directors, Product Managers, Risk Operations Consultants, Clinical Project Research Managers, and IT teams to align with REMS program goals. Supported operations under Solutions, Safety & Risk Management, and Risk Evaluation & Mitigation Strategies. Collaborated with developers to ensure correct implementation of design, providing assets and addressing issues. Designed and coded application components using HTML, CSS, JavaScript, and CSS frameworks like Bootstrap, Materialize CSS, Semantic UI, Material UI, and UIKit. Developed

Front End Developer at Sitezeus

July 1, 2020 - September 1, 2022

Enhanced existing CSS and DIV tags, upgraded using Bootstrap framework for faster web development. Experienced in all UI/UX phases for a Travel Search and Booking web application including design, prototyping, development, and testing. Extensively used selectors for updating DOM content and addressed cross-browser compatibility issues. Designed webpages using latest HTML5 and CSS3 tags, and used HTML local storage for data storage. Collaborated with project manager to review goals, create proposals, and research UI design trends. Styled pages with CSS3 and developed JavaScript user interfaces including source code, event handlers, and callback functions. Developed React app with server-side rendering in Node.js. Participated actively in agile ceremonies and Scrum methodology, providing designs and implementing solutions for user stories. Worked with stakeholders to understand reporting requirements and created interactive website user interfaces. Implemented front-end technical solutio

Front End Developer at Zencastr

November 1, 2018 - June 30, 2020

Facilitated user testing sessions to solicit feedback on prototypes. Participated in the development of a new business application layout using Grid orientation and Bootstrap framework. Built rich prototypes and applications using HTML, CSS, JavaScript, Ajax, JSON, Redux, and Bootstrap. Integrated front-end UI with backend REST API using Axios. Built responsive sites fitting various device sizes using Bootstrap. Responsible for designing, implementation, maintenance, and testing of databases and web pages. Performed JavaScript/AJAX UI upgrades and improvements. Designed web pages with HTML and CSS based on W3C standards and handled cross-browser compatibility issues. Served as an independent consultant for Six Sigma and Business Process Improvement (BPI) projects. Developed UI using Bootstrap and Material-UI. Designed user-friendly navigation for displaying sections of data.

Senior UI/UX Designer at YOU WAY

July 1, 2015 - Present

Design and deliver scalable, high-performance web interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks to support growing product platforms. Translate complex UX designs and business requirements into clean, maintainable, and production-ready front-end code. Improve usability, responsiveness, and visual consistency across applications, enhancing overall user experience and engagement. Build and maintain reusable UI components and design systems to ensure consistency and faster development cycles. Create and optimize UI assets, layouts, and interactive elements using Figma, Photoshop, and Illustrator. Drive UI implementation from concept through deployment, including effort estimation, task breakdown, and technical planning. Collaborate closely with product managers, designers, and engineers to deliver intuitive, user-focused solutions within aggressive timelines. Continuously refine UI performance and accessibility standards to align with best practices and evolving user

Senior UI/UX Designer at United BioSource LLC (UBC)

September 1, 2022 - July 1, 2025

Designed accessible, regulatory-compliant user interfaces for healthcare and clinical applications supporting REMS programs and FDA submissions. Created high-fidelity wireframes, interactive prototypes, and scalable design systems using Figma to ensure design consistency and development accuracy. Translated complex clinical, safety, and risk-management requirements into intuitive, user-friendly interfaces for diverse user groups. Partnered cross-functionally with product managers, clinical research teams, risk operations consultants, and IT to align UI solutions with business and compliance goals. Integrated WCAG accessibility standards and usability best practices to improve adoption, reduce usability risk, and meet regulatory expectations. Produced detailed UI documentation, specifications, and design guidelines to support seamless design-to-development handoff. Supported fast-paced delivery cycles while maintaining strict quality, security, and regulatory standards. Developed high-r

Front-End Developer at SiteZeus

July 1, 2020 - September 1, 2022

Developed responsive, user-centric web interfaces using HTML5, CSS3, JavaScript, Sass/SCSS, and Bootstrap. Built reusable UI components and layouts aligned with modern design systems and front-end best practices. Collaborated closely with designers and product teams using Figma to streamline design-to-development workflows. Ensured seamless user experiences across desktop, tablet, and mobile devices through responsive design techniques. Resolved cross-browser compatibility issues and optimized layouts for performance and usability. Implemented front-end solutions that met business requirements and improved overall user engagement. Integrated UI components with backend services using REST APIs and Axios. Participated in code reviews and iterative UI enhancements to improve maintainability and scalability.

Front-End Developer at Zencastr

November 1, 2018 - June 1, 2020

Contributed to end-to-end UI/UX development of a web-based travel search and booking application from design through deployment. Developed interactive, dynamic front-end features using JavaScript, event handling, and callback functions. Implemented responsive layouts using HTML5, CSS3, and modern styling techniques to ensure cross-device compatibility. Collaborated with project managers and stakeholders to gather requirements and refine UI functionality. Designed and updated application layouts to improve usability, performance, and visual consistency. Addressed cross-browser compatibility issues to ensure consistent behavior across major browsers. Supported UI testing, debugging, and deployment activities to deliver stable front-end releases. Optimized front-end code for performance, scalability, and maintainability. Assisted in proposing UI enhancements and future improvements based on user and stakeholder feedback.

Senior UI/UX Designer at YOU WAY

July 1, 2025 - Present

Design and deliver scalable, high-performance web interfaces using HTML5, CSS3, JavaScript, and modern UI frameworks to support growing product platforms. Translate complex UX designs and business requirements into clean, maintainable, production-ready front-end code. Improve usability, responsiveness, and visual consistency; build and maintain reusable UI components and design systems; create and optimize UI assets using Figma, Photoshop, and Illustrator. Drive UI implementation from concept through deployment, including estimation, task breakdown, and technical planning. Collaborate with product managers, designers, and engineers to deliver intuitive, user-focused solutions within aggressive timelines; continuously refine UI performance and accessibility standards.