y
yusufkosardev

Yusuf K

@yusufkosardev

FullStack Developer

Turkey
Turkish, English
About me
I'm a full-stack developer building web apps end to end - React, Next.js and TypeScript on the front end, Java, Spring Boot and PostgreSQL on the back end. I can help with new websites and web apps, landing pages, admin dashboards, REST API development and integration, database design and bug fixing. Recent work: a car rental & transfer company site with a custom admin panel, plus deployed projects in error tracking, real-time chat and multi-tenant SaaS. I write tested, secure code, reply fast, and stay with the project until you're happy.... Read more

Skills

y
yusufkosardev
Yusuf K
Offline • 

See my services

Custom Websites
I will develop a responsive nextjs website or react landing page with tailwind
From$80 / projectMore details
API & Integrations
I will develop java spring boot restful api backend and microservices
From$15 / projectMore details

Portfolio

Work experience

Freelance

Full-Stack Developer

Freelance • Freelance

Jun 2026 - Present • 4 mos

Building web applications end to end for small businesses and startups. Recent projects: a transfer & reservation platform (responsive UI, REST APIs, database design, end-to-end tests) and a car rental company website with a custom admin panel - delivered in four languages (TR/EN/DE/RU), with session-based authentication, brute-force protection and audit logging, handed over to a non-technical owner with domain, DNS/SSL and deployment set up.