Yağız Berke Güvenç

Senior Frontend Engineer

Istanbul, TR.

About

Highly accomplished Senior Frontend Engineer with over five years of experience specializing in scalable web application development using React, Next.js, and TypeScript. Expertly manages frontend architecture, optimizes performance, and translates complex business requirements into high-quality digital solutions, consistently delivering efficient and user-centric applications while mentoring junior developers.

Work

Renault Türkiye

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Middle Frontend Engineer

Istanbul, Istanbul, Türkiye

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Summary

Led frontend development for dealer websites, leveraging React, Redux, and Material-UI to enhance performance, user experience, and team productivity.

Highlights

Developed robust frontends for dealer websites using React, Redux, and Material-UI, ensuring scalable and user-friendly interfaces.

Significantly improved page loading performance by integrating REST APIs and accessibility standards, achieving notable gains within six months.

Refactored MAIS Port modules within one quarter, modernizing legacy code and updating dependencies to enhance stability and maintainability.

Mentored two junior developers, promoting best practices in React, Redux, and accessibility to boost team productivity and skill development.

Renault Türkiye

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Junior Frontend Developer

Istanbul, Istanbul, Türkiye

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Summary

Designed and optimized core features for multiple React and Redux projects, improving API response times and enhancing responsive design.

Highlights

Designed and implemented core features for multiple React and Redux projects, significantly improving API response times and responsive design.

Integrated real-time communication using Socket.IO and fine-tuned performance with TypeScript for enhanced user interaction.

Built the frontend for the "Total Campaign Participation Management System" within one month using React.js and Material-UI, completely eliminating form errors.

Improved web accessibility, form validation, and overall user experience, ensuring a seamless and inclusive platform.

BİÇözüm

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Junior Full Stack Developer

Istanbul, Istanbul, Türkiye

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Summary

Contributed to Laravel and PHP-based B2B and e-commerce platforms, optimizing payment flows, product management, and user experience.

Highlights

Developed and maintained Laravel and PHP-based B2B and e-commerce platforms, enhancing core functionalities.

Improved payment flows, product management, and overall user experience through full-stack development.

Anatolia System

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Junior Full Stack Developer

Istanbul, Istanbul, Türkiye

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Summary

Optimized frontend and backend integrations using Laravel and PHP to significantly increase application performance.

Highlights

Optimized frontend and backend integrations via Laravel and PHP, significantly increasing application performance and responsiveness.

Türkiye Elektrik Dağıtım A.Ş (TEDAŞ)

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Intern

Istanbul, Istanbul, Türkiye

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Summary

Provided critical support for corporate IT infrastructure operations, gaining hands-on experience in Cisco networking technologies and system sustainability.

Highlights

Supported corporate IT infrastructure operations, gaining practical experience in network management and system maintenance.

Acquired hands-on knowledge of Cisco networking technologies and best practices for system sustainability.

Overteam

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Intern

Istanbul, Istanbul, Türkiye

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Summary

Actively participated in modern frontend development processes, contributing to the design and implementation of web interfaces for PHP and WordPress projects.

Highlights

Contributed to modern frontend development processes, assisting in the design and implementation of web interfaces.

Gained practical experience with PHP and WordPress projects, enhancing web development skills.

Education

Nişantaşı University

Istanbul, Istanbul, Türkiye
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Bachelor's Computer Engineering

Nişantaşı University

Istanbul, Istanbul, Türkiye
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Associate Degree Mobile Technologies Grade: Graduated with High Honors, 2nd in the department

Languages

Turkish

English

Skills

Architecture & Core

React, Next.js, TypeScript, JavaScript (ES6+), Micro Frontends, Atomic Design.

State & Data Management

Redux, Context API, Zustand, REST API (Axios), Socket.IO.

UI & Design

Material-UI, Tailwind, HTML5, CSS3, SCSS, UI/UX, Responsive Design, WCAG Accessibility.

Engineering & Test

Jest, React Testing Library, Git, NPM, SEO, Performance Optimization, Code Review.

References

Doğa Deniz Güçlü

Manager - Renault Türkiye, +90 506 854 44 28

Ömer Şahin

Team Leader - Renault Türkiye, +90 506 826 22 94

Projects

Mais Port (Renault Türkiye)

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Summary

Facilitated internal communication and enabled direct meeting synchronization by developing a React-based ecosystem with Microsoft Teams integration.

Yardım-ci / Roadside Assistance Management System (Renault Türkiye)

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Summary

Developed a centralized operational dashboard using React and Material-UI, accelerating case resolution times.

Renew Türkiye (Renault Türkiye)

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Summary

Enhanced user interaction and accelerated search query performance by refactoring complex filtering and sorting algorithms with TypeScript.

IKAM (Renault Türkiye)

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Summary

Designed a real-time notification system using Socket.IO for instant alerts, shortening request approval times.

Site Management & Task Tracking System (Independent Project)

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Summary

Developed a dynamic task management web panel with role-based authorization and QR code integration using Next.js and the TanStack ecosystem (Query, Table).

Dealer Website (Renault Türkiye)

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Summary

Enhanced SEO visibility for authorized dealers by creating a white-label site using Next.js and React.

Vehicle Valuation App (Renault Türkiye)

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Summary

Completely eliminated data entry errors through advanced form validation algorithms.

Renault/Dacia Online Service Appointment (Renault Türkiye)

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Summary

Modernized the appointment booking architecture using React, reducing transaction times through optimized API calls and simplified form flows.

Total Campaign Management System (Renault Türkiye)

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Summary

Completely eliminated data entry errors by developing advanced form validation algorithms.