Frontend & UI/UX Developer for E‑Commerce Platform

Onkatec; İzmit; On-site; TRY 270,000 - 380,000; Full time

Job summary

ToptanTR is seeking a Frontend / UI-UX Developer to join the team for a full-time office-based role in Izmit. You will translate designs into efficient, accessible web interfaces for a wholesale marketplace and collaborate with designers and backend developers.

You will build listing, search, cart experiences with a mobile-first approach, measure performance with Lighthouse, and progressively modernize the UI while maintaining a cohesive design system.

Qualifications

• Strong experience in frontend development.
• A portfolio showing live interface work and your design process.
• Design and prototyping experience with Figma or similar tools.
• Experience with responsive and mobile-first design.
• Experience measuring and improving web performance with Lighthouse and Chrome DevTools.
• A strong approach to user experience and usability principles.

Responsibilities

• Prepare user flows, wireframes and prototypes for buyer and seller interfaces.
• Create user-centered interface designs with Figma or similar tools.
• Build product listing, search, filtering, product detail, cart and checkout pages with a mobile-first approach.
• Measure and improve Core Web Vitals, page weight, and image and script loading performance.
• Build a consistent and maintainable component and style library.
• Modernize the existing user interface step by step.
• Evaluate design decisions based on user feedback and data.

Skills

Frontend development

UI/UX design

Figma

Responsive design

Web performance

TypeScript

Tools

Figma

Chrome DevTools

Lighthouse

ASP.NET Core Razor

MVC views

Job description

ToptanTR is seeking a Frontend / UI-UX Developer to join the team for a full-time office-based role in Izmit. You will translate designs into efficient, accessible web interfaces for a wholesale marketplace and collaborate with designers and backend developers.

You will build listing, search, cart experiences with a mobile-first approach, measure performance with Lighthouse, and progressively modernize the UI while maintaining a cohesive design system.