Freelance Client
Landing page App
The website communicates our services clearly and professionally. We now have a cleaner online presence for garage doors, pergolas, and related products.
Presentation WebsiteService PagesResponsive UI
porton.roZoltán Felházi
Solving Today's Problems, Building Tomorrow's Web
Experienced frontend developer specializing in React, Vue.js, and Next.js. I build high-performance, SEO-optimised applications and mentor junior developers. Based in Cluj-Napoca, available for freelance projects.
Available for freelance projects in Cluj-Napoca, Romania
Cluj-NapocaRomaniaBabes-Bolyai UniversityMarsh
About Me
I am an expert React developer and Vue.js specialist based in Cluj-Napoca, focused on building scalable, SEO-optimised interfaces. I completed my Master's degree in Computer Science at Babeș-Bolyai University in July 2024, and currently work as a Software Engineer at Marsh.
Previously I was a frontend tech lead at Lynx Solutions, where I architected solutions, established best practices, and mentored developers across frontend teams. I continue to ship high-performance web apps with Next.js and TypeScript through freelance work. See my selected projects and blog for deeper case studies and frontend insights.
Personal Info
- Location: Cluj-Napoca, Romania
- Nationality: Romanian, Hungarian
- Born: October 27, 2000
Languages
HungarianNative
RomanianB2
EnglishB2
Selected Projects
Live client websites with real testimonials — presentation sites, booking apps, and local business projects.
Freelance Client
Christmas Photo Shooting Booking App
The booking flow is simple and clear. Clients can quickly select available timeslots and reserve a Christmas photo shooting session without extra back-and-forth.
Booking AppCalendar & TimeslotsReservation Flow
we-live-once-photography.vercel.appLocal Business
Restaurant Website
The website is modern and clean. It's easy to navigate and the menu is easy to understand. The website is responsive and the images are beautiful.
Presentation WebsiteService PagesResponsive UI
kalotavar.roProfessional Experience (React & Vue Projects)
Over 4+ years of frontend development experience, specializing in React and Vue.js ecosystems. Proven track record of building scalable web applications and mentoring development teams. Explore related project case studies and skills.
Software Engineer
Marsh•
Cluj-Napoca, Romania
Software Engineer at Marsh, contributing to engineering and technical solutions in a global insurance broking and risk management environment.
Key Responsibilities & Achievements:
- Building and maintaining frontend and software solutions within Marsh's engineering organisation
- Collaborating with cross-functional teams on reliable, user-facing product experiences
- Applying modern web engineering practices with a focus on quality, maintainability, and delivery
ReactTypeScriptJavaScriptFrontend EngineeringSoftware Engineering
Frontend Developer / Tech Lead
Lynx Solutions•
Cluj-Napoca, Romania
As a frontend developer and later tech lead, I designed and built modern, responsive, and accessible web applications with a strong focus on performance, scalability, and user experience. Led technical decisions for frontend teams before moving to Marsh in April 2026.
Key Responsibilities & Achievements:
- Developed and maintained high-performance web apps using React, Next.js, and TypeScript
- Built clean, reusable UI components and responsive layouts using TailwindCSS, along with hands-on experience in CSS and SCSS
- Delivered SEO-optimized projects leveraging advanced Next.js features like static site generation (SSG) and server-side rendering (SSR)
- Integrated REST APIs and dynamic data fetching strategies for seamless frontend–backend communication
- Ensured cross-browser compatibility and mobile-first design principles
- Collaborated closely with designers and backend teams to implement pixel-perfect interfaces
- Contributed to component libraries and internal tooling to improve development speed and consistency
- As tech lead: architected solutions, set best practices, and mentored frontend developers
ReactNext.jsTypeScriptTailwindCSSSCSSCSSREST APIsSEOSSGSSRTechnical Leadership
Frontend Developer
Freelance•
Remote
Contributing to a high-scale, user-facing application serving over 5,000 active users. Working within a modern frontend tech stack including Vue.js, Nuxt 3 (SSR), and TypeScript, with a strong emphasis on performance, maintainability, and scalability.
Key Responsibilities & Achievements:
- Developing and maintaining new features in a complex, high-traffic crypto-related web app
- Leveraging Nuxt 3 for server-side rendering and optimized SEO performance
- Collaborating closely with backend teams integrating REST APIs
- Utilizing Tailwind CSS to build clean, responsive, and accessible UI components
- Staying at the forefront of frontend technology trends and best practices
Actively working in a fast-paced, innovative environment focused on the evolving Web3 ecosystem.
Vue.jsNuxt 3 (SSR)TypeScriptTailwind CSSREST APIsWeb3Crypto
Frontend Internship Mentor (4 sessions: 2022–2025)
Lynx Solutions•
Cluj-Napoca, Romania
Mentored groups of frontend interns across multiple annual sessions (Spring or Summer), while continuing my core role as a frontend developer. Each internship ran for approximately 3 months per year, during which I dedicated time to guiding students through real-world projects, code best practices, and team collaboration.
Key Responsibilities & Achievements:
- Led small frontend teams using React, Next.js, and TypeScript
- Acted as both a mentor and project manager, managing task boards and product direction
- Provided technical guidance, feedback, and performance evaluations
- Focused on best practices: SEO, SSR, routing, form validation (Zod), component documentation (Storybook), and UI libraries (TailwindCSS, RadixUI)
- Delivered training on API integration using backend collaboration
- Projects included multi-language support, theme toggling (light/dark mode), and accessibility improvements
- Continuously improved internship processes and contributed feedback for future sessions
ReactNext.jsTypeScriptZodStorybookTailwindCSSRadixUIMentoringProject Management
Full Stack Developer (Internship)
University Project•
Remote, Romania
Obligatory internship from university. Developed an online platform for internship management. Worked on both frontend (React) and backend (C#), learning full-stack development practices.
Key Responsibilities & Achievements:
- Built complete internship management platform
- Gained experience in both frontend and backend development
- Learned team collaboration and development workflows
ReactC#.NETFull Stack Development
Career Timeline
A visual representation of my professional journey, starting from a single life branch. Each education creates its own branch. Employment at Lynx Solutions and Marsh each open dedicated branches from life (with Lynx merging back when that chapter ended), and freelance work forks separately.
Education
Romanian Baccalaureate
Bathory Istvan High School•Aug 2015
Bachelor's Degree in Computer Science
Babes-Bolyai University•Sep 2019
Full Stack Developer (Internship)
University Project•Jul 2021
Master's Degree in Computer Science
Babes-Bolyai University•Oct 2022
Employment
Frontend Developer
Lynx Solutions•Sep 2021 - Jan 2024
Frontend Internship Mentor
Lynx Solutions•Mar 2022 - May 2025
Frontend Tech Lead
Lynx Solutions•Jan 2024 - Mar 2026
Software Engineer
Marsh•Apr 2026 - Present
Freelance
Felhazi Zoltan PFA
Freelance•Nov 2024
Frontend Developer
Freelance•Dec 2024 - Oct 2025
Christmas Photo Shoot Booking App
Freelance•Dec 2025
Landing page App
Freelance•Feb 2026
Skills & Tech Stack
Core stack for SEO-optimised React and Vue.js applications—see also projects and experience.
Frontend Frameworks
ReactVue.jsNextJSNuxt 3JavaScriptTypeScriptHTML5CSS3
UI & Styling
TailwindCSSSCSSMaterial-UI (MUI)RadixUIResponsive Design
State Management & APIs
ReduxTanStack QueryAxiosRESTful APIsReact Hook FormZodYup
Tools & Soft Skills
GitTeam CollaborationMentoringProject ManagementMicrosoft OfficeProblem Solving
Education & Volunteering
Education
Master's Degree in Computer Science
Oct 2022 - Jul 2024
CompletedBabes-Bolyai University•
Cluj-Napoca, Romania
Bachelor's Degree in Computer Science
Sep 2019 - Sep 2022
CompletedBabes-Bolyai University•
Cluj-Napoca, Romania
Romanian Baccalaureate
Aug 2015 - May 2019
CompletedBathory Istvan High School•
Cluj-Napoca, Romania
Volunteering
University Mentor Program
Sep 2020 - Jun 2021
Babes-Bolyai University•
Cluj-Napoca, Romania
Mentored 15 first-year students, helping them adapt to university life. Met weekly online to assist with homework and provide guidance on academic and personal matters.
Contact
Hire a frontend developer in Cluj-Napoca for React, Vue.js, and TypeScript projects—or reach out about freelance collaboration.
Contact Information
Cluj-Napoca, Romania
I'm always interested in new opportunities and exciting projects. As a cheerful and collaborative individual, I find great satisfaction in working within teams. Feel free to reach out!