IoannisKleftogiannis
Crafting performant and engaging digital experiences with React, TypeScript, and modern web technologies.
const developer = {
name: "Ioannis Kleftogiannis",
role: "Frontend Developer",
skills: ['React, TypeScript, Next.js']
};About Me
<Experience />
Front End Engineer
June 2025 - Present
Working on frontend development for enterprise telecom projects, designing reusable UI systems and contributing to system architecture and CI/CD pipelines.
Front End Developer
July 2023 - March 2025
Built secure payment platforms (OKTO.Direct, OKTO.Cash) with React and TypeScript, implementing state management and performance optimizations.
Front End Developer
August 2022 - March 2023
Developed cross-platform apps (React.js, React Native) for pharmaceutical clients, focusing on accessibility and performance.
Full Stack Developer
April 2022 - June 2022
Created UI components for climate data visualization and gaming platforms with responsive design.
Frontend Developer focused on building exceptional web experiences
Frontend Engineer with 3+ years of experience delivering scalable applications across fintech, telecom, and healthcare. Currently at Cognity, working on enterprise frontend development with focus on system architecture and performance.
Experienced in React, TypeScript, and modern state management. Strong focus on building maintainable, accessible interfaces while collaborating with cross-functional teams in Agile environments.
Passionate about clean code, performance optimization, and leveraging AI-assisted development to accelerate workflows and improve code quality.
Location
Athens, Greece
const approach = {
clean: true,
performant: true,
accessible: true,
scalable: true
}Featured Projects
Real-world projects showcasing full-stack development, UI/UX design, and modern web technologies.
OurChapter
A full-stack SaaS platform for creating personalized digital stories. Built with Next.js and TypeScript, featuring custom authentication (Clerk), database management (Supabase), and payment processing (Stripe). Includes drag-and-drop page builder and shareable story pages.
Technical Skills
A comprehensive overview of my technical stack and expertise.
Frontend
Styling
State Management
Tools & Testing
Get In Touch
Let's connect and discuss how we can work together to create something amazing.
Ready to start a project?
I'm currently available for freelance work and full-time opportunities. Whether you have a question or just want to say hi, I'll try my best to get back to you!
Send me an emailconst contact = {
email: "kleftojohn@gmail.com",
status: "available",
responseTime: "24 hours"
}