István Zoltán Szász

Q: Who is István Zoltán Szász?

István Zoltán Szász (also written Istvan Zoltan Szasz, username istvanszasz99) is a Junior Full-Stack Web Developer and Computer Science Engineer based in Érd, Hungary. He builds modern web applications with React, Next.js and TypeScript and holds a BSc in Computer Science Engineering from Óbuda University (graduated February 2025).

Q: What technologies does István Szász specialise in?

His primary stack includes React, Next.js, TypeScript, Tailwind CSS, and Motion on the frontend; Node.js and Express.js on the backend; React Native for mobile; and Unreal Engine 5 for 3D development. He also works with GSAP, shadcn/ui, GitHub Actions, Docker, Kubernetes, PostgreSQL, MongoDB and GraphQL.

Q: Is István Szász available for hire or freelance work?

Yes. István Szász is open to freelance projects, full-time roles, and collaborations. He can be contacted at istvanszasz99@gmail.com or through his LinkedIn profile at https://linkedin.com/in/istvanszasz99.

Q: Where did István Szász study?

He studied Computer Science Engineering (BSc) at Óbuda University, Alba Regia Faculty of Engineering, in Székesfehérvár, Hungary (September 2019 – February 2025). Before that, he attended Bálint Márton Vocational Secondary School in Törökbálint, where he specialised in Computer Science (2014–2019).

Q: Where has István Szász worked?

From March 2026 to May 2026 he worked remotely as a Full-Stack Web Developer at MolnarCodes, contributing to client projects including solidfinances.hu and mindenegyseg.hu. He is currently open to new opportunities.

Q: What certifications does István Szász hold?

István Szász holds 4 professional certifications: Microsoft Full-Stack Developer Professional Certificate (2025), IBM Full-Stack JavaScript Developer Professional Certificate (2025), Meta Full-Stack Developer Professional Certificate (2024–2025), and Meta React Native Specialization (2024). All completed via Coursera.

Q: What is istvanszasz99.dev?

istvanszasz99.dev is the personal portfolio website of István Zoltán Szász. It showcases his technical skills, work experience, and featured projects, and provides contact information for professional enquiries.

István Zoltán Szász

István Zoltán Szász (alternate spelling: Istvan Zoltan Szasz, username: istvanszasz99) is a Junior Full-Stack Web Developer and Computer Science Engineer based in Érd, Hungary. He builds modern, responsive web applications with React, Next.js and TypeScript. He holds a Bachelor of Science in Computer Science Engineering from Óbuda University (Alba Regia Faculty of Engineering, Székesfehérvár), graduated February 2025. He worked as a Full-Stack Web Developer at MolnarCodes (remote, March 2026 – May 2026). He is open to freelance projects, full-time roles, and collaborations worldwide.

Contact

Email: istvanszasz99@gmail.com
GitHub: github.com/istvanszasz99
LinkedIn: linkedin.com/in/istvanszasz99
Website: istvanszasz99.dev
Location: Érd, Pest County, Hungary
Status: Open to opportunities
Certifications: 4
Projects completed: 10+
Technologies: 30+

Technical Skills

Frontend Development

React — component-based UI development, hooks, context, state management
Next.js — server-side rendering, static site generation, App Router
TypeScript — static typing, interfaces, generics
JavaScript (ES2020+) — modern JS, async/await, modules
Tailwind CSS — utility-first CSS framework
GSAP — high-performance animation library
Motion (Framer Motion) — React animation library
Responsive Web Design and Mobile-first development
Search Engine Optimisation (SEO) and Web Performance Optimisation
Chrome DevTools — debugging

Backend Development

Next.js, Node.js and Express.js for server-side development
REST API design and implementation
Authentication, validation and secure server-side logic

DevOps

CI/CD pipelines automated with GitHub Actions
Containerised applications with Docker
Container orchestration and scaling with Kubernetes
Cloud deployment and serverless hosting for production releases

Databases

Relational data modelling and querying with PostgreSQL and SQL
Document-based storage with MongoDB and NoSQL
Flexible, typed API data fetching with GraphQL

Mobile Development

React Native — cross-platform iOS and Android development
Expo — React Native toolchain
Android Studio
Mobile UI/UX best practices

3D Development

Unreal Engine 5 — 3D scene creation, level design, game development
Twinmotion — architectural visualisation
Blueprints visual scripting
C++ programming within Unreal Engine

UI/UX Design

UI design and UX research principles
Design systems and component libraries (Shadcn/ui)
Responsive design for desktop, tablet and mobile
Wireframing and prototyping with Figma

Tools and Technologies

HTML5, CSS, Tailwind CSS, Motion, JavaScript, TypeScript, React, Next.js, Redux, Express.js, Node.js, Python, Django, C#, .NET, Docker, Kubernetes, Chrome DevTools, Microsoft Azure, Cloudflare, PostgreSQL, GraphQL, MongoDB, Git, GitHub, Claude Code, Figma, Android Studio, Expo, C++, Unreal Engine, Twinmotion, Electron, Visual Studio Code, macOS, Windows, Microsoft Office

Work Experience

Full-Stack Web Developer

Employer

MolnarCodes

Period

March 2026 – May 2026

Type

Full-time, Remote

Responsibilities

Optimised and made client websites and web interfaces fully responsive.
Proposed UI/UX improvements and implemented them following joint discussion, and implemented SEO and GEO (Generative Engine Optimization) to improve visibility in search engines and AI-powered search.
Independently integrated Next.js, Tailwind CSS, shadcn/ui and GSAP into production work.
Refactored client codebases and resolved bugs to improve readability, maintainability and performance.

Projects

solidfinances.hu — Frontend development using React and Tailwind CSS for a Hungarian financial services platform
mindenegyseg.hu — Full-Stack development using Next.js, Tailwind CSS, GSAP, and Shadcn/ui

Education

Bachelor of Science in Computer Science Engineering

Institution: Óbuda University, Alba Regia Faculty of Engineering
Location: Székesfehérvár, Hungary
Period: September 2019 – February 2025
Thesis: Simulation of the Óbuda University Campus in a 3D Environment using Unreal Engine 5
Credential: BSc degree

High School Diploma, Specialisation in Computer Science

Institution: Bálint Márton Vocational Secondary School
Location: Törökbálint, Hungary
Period: September 2014 – May 2019

Certifications

Microsoft Full-Stack Developer Professional Certificate (2025) — via Coursera — verify
IBM Full-Stack JavaScript Developer Professional Certificate (2025) — via Coursera — verify
Meta Full-Stack Developer Professional Certificate (2024–2025) — via Coursera — verify
Meta React Native Specialisation (2024) — via Coursera — verify

Featured Projects

Frontend development for solidfinances.hu

Category: Web Development — Frontend
Client: MolnarCodes
Live URL: solidfinances.hu
Technologies: React, Tailwind CSS, Responsive Design, Chrome DevTools
Description: Frontend development for a Hungarian financial services website. Built with React and Tailwind CSS, optimised for performance and all screen sizes.

Full-Stack development for mindenegyseg.hu

Category: Web Development — Full-Stack
Client: MolnarCodes
Live URL: mindenegyseg.hu
Technologies: Next.js, Tailwind CSS, GSAP, Shadcn/ui, Responsive Design, Chrome DevTools
Description: Full-Stack development for a Hungarian website. Built with Next.js and Tailwind CSS, GSAP animations, and Shadcn/ui components. Fully responsive and performance-optimised.

Simulation of the University Campus in 3D Environment

Category: 3D Development — Academic Thesis
Repository: GitHub
Technologies: Unreal Engine 5, Twinmotion, C++
Description: A 3D educational simulation allowing users to virtually visit the campus of Óbuda University in Székesfehérvár, Hungary. Created using Unreal Engine 5 with high-resolution textures for photorealistic rendering. This was the university BSc thesis project.