Hire the best Firebase Developers in Hungary

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$50 hourly
Peter K.
- 5.0/5
- (2 jobs)
My main experiences are in Swift and Objective-C, more than 4 years in Swift and 10 in Objective-C. My strongest skill is building stable, scalable, well-structured architectures. I really enjoy working on Bluetooth based IOT projects, on map-based apps like a hiking app, and of course on 2 or 3D games. Before becoming a freelancer, I was working for a small Hungarian game developer company in the beginning as an iOS developer, then as a project lead on multiple projects and finally as a CTO. In my free time, when I’m not working on one of my pet projects, I like to play football or going out with my friends.

Firebase
Core Location
Stripe
SceneKit
Core Bluetooth
SpriteKit
MapKit
Swift
Objective-C
$50 hourly
Eva K.
- 5.0/5
- (23 jobs)
💡 Over the past 10 years, I’ve built high-performance web, mobile, and AI-powered applications that drive real business value. My expertise spans React, Vue, Next.js, Node.js, Python, Flutter, and React Native, delivering robust SaaS platforms, Single Page Applications (SPA), and AI-driven solutions. 📈 My work powers businesses across fintech, healthcare, AI, and e-commerce, with applications that have scaled to millions of users and generated significant revenue. Whether you need an AI-powered chatbot, a scalable SaaS product, or a mobile app, I bring deep technical expertise and strategic thinking to the table. 🔹 Looking for a reliable, long-term tech partner? Let’s chat! I specialize in helping enterprise companies scale their platforms efficiently. Now TOP RATED PLUS on Upwork! 🟢 KEY SKILLS 🌟 Full-Stack & SaaS Development: ✔️ Architecting scalable web & mobile applications with React, Vue, Next.js, and Node.js ✔️ Backend expertise with Express, FastAPI, and Nest.js ✔️ API development & integration (REST, GraphQL, WebSockets) ✔️ Authentication & security: OAuth, JWT, Firebase Auth 🌟 Mobile App Development: ✔️ React Native, Flutter, Swift, Kotlin for cross-platform and native apps ✔️ UI/UX expertise with Material UI, Tailwind CSS, and SwiftUI ✔️ Performance optimization and CI/CD for seamless updates 🌟 AI & Machine Learning: ✔️ AI-powered solutions using OpenAI, LangChain, TensorFlow, PyTorch ✔️ Chatbots, AI agents, and NLP-based applications ✔️ Recommendation systems and predictive analytics 🌟 Cloud & DevOps: ✔️ Cloud deployment on AWS, Google Cloud, Firebase, and DigitalOcean ✔️ CI/CD pipelines with Jenkins, GitHub Actions, Fastlane ✔️ Scalable databases: PostgreSQL, MongoDB, Firebase Firestore 🌟 Data Management & Testing: ✔️ Database design & optimization (SQL, NoSQL) ✔️ Unit & integration testing with Jest, Cypress, Mocha, XCTest ✔️ AB Testing, analytics, and performance monitoring 🔥 Why Work With Me? ✅ Full-cycle development: From idea validation to launch & scaling ✅ Enterprise-ready solutions: Robust, maintainable, and scalable architecture ✅ Proven track record: Apps with millions of users & high revenue generation ✅ Long-term partnerships: I work closely with teams to ensure continuous growth 📩 Let’s build something amazing! Contact me today for a free consultation 🚀

Firebase
Apple Xcode
OpenAI API
Node.js
JavaScript
React
Mobile App Development
Kotlin
Flutter
React Native
Android App Development
iOS
iOS Development
Swift
App Development
$35 hourly
András Imre H.
- 5.0/5
- (3 jobs)
As a student I specialized in Business Informatics, I focus on the frontend of single page web applications. I am interested in product development, so I feel most comfortable if I can work on one product. If it is a startup project, then I like it even better. I have experience in all of these approaches: jQuery, MVC, MVVM, component-based frameworks. I prefer to use the latest stable technologies such as React and NodeJS ecosystem.

Firebase
React Native
NoSQL Database
Static Site Generator
Business Process Modeling
Git
CSS 3
HTML5
Tailwind CSS
Figma
Google Cloud Platform
Microservice
JavaScript
Next.js
Node.js
React
$10 hourly
Mohammad U.
- 5.0/5
- (2 jobs)
Hello! I’m a full-stack developer specializing in Flutter, Firebase, Node.js, and Mongoose. I build high-quality, cross-platform mobile apps with Flutter and scalable, efficient backends with Node.js and MongoDB. I stay updated with the latest tech trends to deliver clean, maintainable code and bring clients' ideas to life. Whether you need end-to-end solutions, frontend, or backend expertise, I’m here to help. Let’s discuss your project—I’d love to create a customized solution for you.

Firebase
User Authentication
Mobile App Development
API Integration
UX & UI
App Design
Flutter
Firebase Realtime Database
Firebase Cloud Firestore
Dart
$10 hourly
Serhan O.
- 5.0/5
- (7 jobs)
WHO AM I: Hello, I'm a mobile developer from Hungary. Currently, I'm studying electrical/electronic engineering in Hungary. I'm a hard worker and creative person, I speak English(Fluent), Turkish(Native), and Hungarian(Intermediate). SKILLS AND EXPERIENCES: I'm working on mobile applications since 2019 December. I develop native apps, Android with Java and iOS with Swift. Besides that, I have experience with Kotlin and a little bit of JavaScript as well. I worked on my own projects, freelance projects and I published an app on PlayStore and AppStore before; -TurnedTables App(Available on Hungarian and Turkish stores). Portfolio: serhanportfolio.wixsite.com/website Github: github.com/hansaray Blog: medium.com/@serhanozyilmaz

Firebase
UIKit
API Integration
Turkish
App Development
Android
Smartphone
Hungarian
Java
iOS
Android App Development
iOS Development
English
Swift
$30 hourly
Botond B.
- 5.0/5
- (3 jobs)
I am a diligent and innovative Full Stack Developer with extensive expertise in designing, implementing, testing, and maintaining sophisticated systems and applications. I aim to apply my robust foundation in web and mobile application development to add exceptional value to a prospective employer. My process is deeply customer-centric; I emphasize daily communication and procedural checks to ensure transparency and efficiency. Adaptability and flexibility are hallmarks of my methodology, with a consistent focus on delivering the best outcomes. What I can offer: • Development of mobile apps, web applications, Progressive Web Applications (PWAs), and fully functional websites from MVPs to complete systems • Database architecture and optimization • Integration of APIs for functionalities such as Stripe payments or dynamic PDF generation • UI/UX design framework construction using tools like Figma • Implementation of responsive designs for optimal cross-device compatibility • Development of intuitive admin dashboards • Deployment of applications to the App Store and Google Play Store • Incorporation of advanced features like mapping services, QR code scanning, text-to-speech capabilities, sophisticated filtering, drag-and-drop interfaces and more... • Prompt communication and delivery of reliable, high-quality work Experiences: 🎨 UI/UX Design with Figma: Leveraged Figma for initial UI/UX designs to streamline client feedback and enhance the design approval process, significantly reducing time from concept to prototype. 🔁 Prototyping for Feedback: Integrated client and user feedback into interactive prototypes to refine and enhance the final product, leading to improved user satisfaction post-launch. 🧩 Component Unity with Figma: Established design consistency across applications by creating reusable Figma components, ensuring brand coherence and facilitating a more efficient development cycle. 🌈 Moodboards and Style Guides: Developed mood boards and style guides in collaboration with clients at the project's outset, aligning final outcomes with market demands and client visions. 💻 Development Efficiency with Figma: Translated Figma components into code to streamline the development process, ensuring an accurate and efficient translation of client requirements into the final product. 📦 Node.js Package Utilization: Improved code robustness and expedited development by incorporating established Node.js packages and libraries, leading to enhanced backend performance and scalability. ⚛️ React for Performance: Utilized React to develop high-performance web and mobile applications, resulting in faster loading times and a superior user experience that enhanced user engagement and retention. 📈 Scalability with Firebase and AWS: Utilized Firebase and AWS to provide scalable backend solutions, enabling cost-effective management of fluctuating user loads with consistent service quality. 📱 Cross-Platform Development with React Native: Utilized React Native to maintain a unified codebase for both iOS and Android platforms, saving on development time and costs while ensuring a seamless user experience across devices. 🔄 Redux for State Management: Implemented Redux to manage state in complex web applications, enhancing maintainability and making state changes more predictable and easier to track. 🚀 JavaScript Optimization: Optimized JavaScript code and utilized asynchronous programming to streamline user interactions, leading to smoother web app performance and reduced load times. 🔒 TypeScript for Application Architecture: Employed TypeScript for static type checking to bolster application robustness, which helped minimize runtime errors and improved overall development workflow. 🛡️ Website Security with reCAPTCHA: Improved website security by integrating Google reCAPTCHA into forms, significantly reducing spam submissions and enhancing user trust and data integrity. 💳 Stripe for Payment Processing: Implemented Stripe's payment processing to provide secure and diverse payment options, enhancing customer checkout experience and potentially improving e-commerce conversion rates. ✉️ Auto Email Notifications: Developed an automated email notification system, triggered by user actions, to foster better customer engagement and improve communication workflows. 📊 Admin Dashboard Development: Created a comprehensive admin dashboard to simplify content management and data analysis, streamlining administrative operations and decision-making processes. 📲 QR Code Functionality: Introduced QR code generation and scanning functionality to expedite user onboarding, providing quick access to app features and simplifying user account setup. 🗣️ Accessibility with Text to Speech: Integrated a text-to-speech library to enhance app accessibility, expanding usability for visually impaired users and ensuring compliance with accessibility standards. If I raised your attention please do not hesitate to reach out!

Firebase
Bubble.io
UX & UI
UI/UX Prototyping
Mobile App
Web Application
Node.js
Figma
React Native
React
SQL
Responsive Design
TypeScript
JavaScript
Java
$35 hourly
Gergely O.
- 0.0/5
- (0 jobs)
I'm game developer with years of experience developing games and applications for Android, IOS, VR/AR and PC using the Unity engine. I can help you with modifications in your existing application or start a whole new project from scratch. I can also offer you guidance and ideas on your game if you'd like me to.

Firebase
Online Multiplayer
Meta Quest
VR Application
UI/UX Prototyping
Google APIs
Game
Game Design
Android
C#
Video Game
Unity
$40 hourly
Imre K.
- 0.0/5
- (0 jobs)
A motivated and energetic developer with expertise in Kotlin Multiplatform Mobile development, experienced in leading cross-platform application development, managing teams, and contributing to the success of sales and tender processes. Passionate about staying up-to-date with the latest technologies and sharing knowledge with fellow developers.

Firebase
Mobile App Strategy
Mobile App
Architecture
Figma
Android SDK
Mobile App Redesign
Mobile App Improvement
Mobile App Development Consultation
iOS Development
Android App Development
Swift
Kotlin
iOS
Android
$30 hourly
Gabor R.
- 5.0/5
- (13 jobs)
🎯 Dedicated IT professional with knowledge in Mobile (Flutter), Web (VueJS / NuxtJS) and Backend (NodeJS/TypeScript and Java), developing crossplatform mobile apps, complex web solutions and enterprise/distributed/middleware systems. 💪 I guided and worked with several partners achieving the following: ⚡Choosing just the right solution - saving time & costs ⚡Getting fast to the market - agile & MVP approach ⚡Creating quality apps and services - your success is our success! 🗪 I am keen on transparency, good UX, and client satisfaction. 👥 I am also a member of a Hungarian-based, multifaceted company called WunderBytes and as a team we can ensure to provide a wide range of services & competencies if required. Let's get IT done!

Firebase
Flutter
DigitalOcean
Flutter Stack
Architectural Design
Business Analysis
Google Cloud Platform
Docker
Node.js
MongoDB
TypeScript
Amazon Web Services
LoopBack
Vue.js
$50 hourly
Istvan K.
- 5.0/5
- (3 jobs)
iOS App Developer | Frontend Web Developer (React) ⭐ 6+ years in iOS development ⭐ 4+ years in Frontend Web development ⭐ Worked in multiple startups as an iOS developer, independently designed and developed several iOS and full-stack apps ⭐ Some experience with the following technologies: Backend development, Desktop app development (Electron), Cross Platform Mobile development (React Native), Shopify development, LangChain, ChatGPT, OpenAI, LLMs, Stable Diffusion 👉 Delivered / worked on projects that focused on: - Healthcare, mobile games, e-commerce, fashion, web games, AI content generation 👉 Technology stack: 📲 𝐍𝐚𝐭𝐢𝐯𝐞 𝐢𝐎𝐒 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Swift, UIKit, SwiftUI, SpriteKit, Realm, Core Data, RxSwift, Combine, REST API, MVC, MVVM-C, Redux, Unit, UI Testing, Fastlane, Circle CI, Git, GitHub, CocoaPods, SPM, Sketch, Figma 🌐 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐖𝐞𝐛 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: HTML, (S)CSS, Tailwind, JavaScript, TypeScript, React, Next.js, Google Cloud, Firebase, Google Analytics, Web Scraping, Netlify, Vercel, Stripe, Google Maps API 🏗 𝐒𝐨𝐦𝐞 𝐨𝐭𝐡𝐞𝐫 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐈'𝐯𝐞 𝐮𝐬𝐞𝐝 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐚𝐬𝐭: Shopify, Electron, React Native, LangChain, OpenAI, ChatGPT API, LLMs 👉 Some projects I worked on: 𝐢𝐎𝐒 𝐚𝐩𝐩𝐬: ✅ Vivid: Vivid is an AI image generator app with lots of preset styles and a public feed where you can browse through AI art created by other users. I built the app using SwiftUI with MVVM-C architecture. The app uses Firebase Authentication. The images are generated using Stable Diffusion on a serverless backend running on Google Cloud. The backend is a collection of Cloud Functions written in TypeScript. ✅ CopDeck: I developed and released a sneaker price comparison and inventory management iOS app for sneaker resellers that included a web scraping algorithm using Google Cloud, back-end, and the CopDeck landing page built with Next.js, TypeScript, Tailwind and Netlify. ✅ LabTwin: A niche digital assistant for pharmaceutical industry scientists used to improve productivity by reducing note-taking. I worked for them as an iOS developer. My work involved building UI components in UIKit, building the app's persistence layer using Realm, setting up CI pipelines and automated testing. ✅ SidelineSwap: SidelineSwap is an e-commerce store for used sporting goods. My responsibilities were modernizing the app UI, improving software architecture by implementing the MVVM-C pattern, rebuilding the payment checkout flow. ✅ Ball Smasher: Ball Smasher was a mobile game built for iOS using 2D physics engine (SpriteKit). The game reached the top of iOS App Store charts, achieving 7M+ downloads and 4.5/5 rating from 64K+ reviews. I was the lead developer of the game and the co-founder of the company who released it. ✅ Other iOS games: I developed and released 4 simple iOS games. My games have been played by 100K+ people. 𝐖𝐞𝐛 𝐚𝐩𝐩𝐬: ✅ GameGuide AI (currently under development): I developed a game guide AI chatbot using OpenAI, LangChain, React, Next.js, TypeScript, Firebase and Google Cloud functions. Currently the chatbot can only answer questions about the popular game, Skyrim. The training data for the bot is scraped from the largest Skyrim wiki website, and stored in a vector database. ✅ Hide & Seek World: Independently designed and developed a web-based real-time multiplayer game. The game has had 100K+ players to date and currently reaches 500 daily active users. It was selected for Google for Startups Cloud Program and received $4000 in free Google Cloud credits. Features include multiple game modes for 2-100 players, leaderboards, private matches, and a games stats dashboard. I developed it using Next.js, TypeScript, Firebase and Google Cloud serverless functions. ✅ Shopify e-commerce store: I developed a Shopify-based portfolio website & e-commerce store for selling jewelries.

Firebase
AI Chatbot
React
iOS Development
Front-End Development
Stripe
Google Maps API
iOS
TypeScript
Next.js
Swift
RESTful API
Google Cloud Platform
JavaScript
$10 hourly
Balint N.
- 0.0/5
- (1 job)
I'm a web developer with over 2 years of experience of building web based applications for small and medium-sized businesses. I graduated from the University of Pannonia in 2023. I've been working since my 4th semester of my bachelors and since I graduated I've been working at a scottish company named GearedApp building small to medium-sized applications for various clients and maintaining them. My main stack is React, Tailwind, Next.js and Nest.js. If you have a fun project in your mind and you are interested in working with me, don't hesitate to contact me. My goal is to gain some extra experience on the side to broaden my knowledge about web development. I speak 3 languages those being English, Hungarian and German. If you decide to contact me, you can text me in either of those languages. Cheers!

Firebase
CMS Development
TypeScript
Bitbucket
GitHub
MongoDB
Next.js
Node.js
Tailwind CSS
React
JavaScript
$5 hourly
Geza G.
- 0.0/5
- (0 jobs)
I am a software developer from Hungary. I started to learn how to code when I was only 13 years old. I am currently 18 years old. In that period of time I made a ton of mobile applications.

Firebase
Firebase Realtime Database
Firebase Cloud Firestore
Web Development
App Development
Flutter
Python
$65 hourly
Marcell G.
- 0.0/5
- (0 jobs)
Im a full-stack developer with 4+ years of experience, including the past 2 years working with Mercedes-Benz on internal systems. I specialize in building fast, scalable applications—whether it's a custom website, scheduling system, PDF generator, or cross-platform business tool. ✅ Performance-optimized apps (e.g., Protobuf + RSocket for low-overhead Android apps) ✅ Cross-platform solutions (Compose Multiplatform, Firestore, Kotlin) ✅ Real-world business value (digitalizing time tracking, cutting hosting costs, etc.) If you're looking for clean code, solid architecture, and someone who speaks both tech and business—I’m ready to help.

Firebase
React
NoSQL Database
SQL
JavaScript
Python
Java
Android App Development
iOS Development
Web Application
Web Development
App Development
$25 hourly
Dominik D.
- 0.0/5
- (1 job)
I'm a Junior Full Stack Developer, currently doing a UX/UI course, I usually do translating also on the side, as well as designing websites and making the code for them.

Firebase
PostgreSQL
Mongoose
MongoDB
JavaScript
C#
Java
Flutter
React
Entity Framework
ASP.NET
Translation
$15 hourly
Saad T.
- 0.0/5
- (0 jobs)
Web Development, Software Development, Mobile App Development, .NET Core, MERN | MEAN, I’m a Full-Stack Developer with over 8 years of experience crafting digital solutions across various platforms. I take pride in having successfully completed projects for clients from the United States, Canada, Europe, the Middle East, and Australia. What sets me apart is my ability to analyze clients’ requirements meticulously and propose solutions that align with their budget and timeline constraints. My commitment extends beyond just project delivery; I offer comprehensive post-development support and maintenance to become your reliable, long-term IT partner. 🌐 Web Development: Expert in HTML, CSS, JavaScript, and frameworks like React JS and Angular, I deliver responsive and interactive websites. 💻 Software Development: With proficiency in .NET Core and the MERN stack, I offer robust software solutions catering to diverse business needs. 📱 Mobile App Development: From React Native to Swift, I develop seamless and high-performing mobile applications for both Android and iOS platforms. 🛠 .NET Core: Specializing in creating scalable and secure web applications with .NET Core, ensuring high performance and reliability. 🧩 MERN Stack: Leveraging MongoDB, Express.js, React, and Node.js, I build full-stack web applications that are efficient and user-friendly. 📣 Ready to bring your vision to life with top-tier development services? Let’s connect and discuss your project today!

Firebase
iOS Development
Hybrid App Development
Database
Mobile UI Design
Back-End Development
Front-End Development
Flutter
Mobile App Development
Android App Development
React Native
API Development
MongoDB
Node.js
JavaScript
$15 hourly
Vepa B.
- 0.0/5
- (0 jobs)
I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help.

Firebase
Python
Django
Vue.js
Figma
JavaScript
React
Dart
Flutter
App Development
iOS Development
Android App Development
$15 hourly
Hunor M.
- 0.0/5
- (0 jobs)
I’m a passionate Web Developer with a strong focus on modern, responsive, and performance-optimized web applications. I specialize in Vue.js, TailwindCSS, Codeigniter 4, Rest APIs, MySQL, but I also enjoy learning new technologies and fulfilling challenging tasks. I enjoy working on small to mid-sized projects where I can collaborate closely with clients, move fast, and deliver clean, maintainable code. Whether it’s a landing page, a custom dashboard, or a full-stack web app, I aim to make development smooth and efficient.

Firebase
Node.js
JavaScript
PHP
SEO Performance
React
HTML
Cross Browser & Device Compatibility
Responsive Design
REST API
MySQL
CodeIgniter
Next.js
Tailwind CSS
Vue.js
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