Hire the Best Firebase Developers in Sumy, UA

Upwork certified Mobile App Developer, Senior Mobile App Developer, React Native, DevOps, React Developer, IOS mobile app Developer, Android mobile app Developer, Node.JS, TypeScript, Hybrid App Development, AI Mobile App Development, Web Development with experience in mobile app development for 10 years. I turn your bold ideas into reality✨ My responsibilities: ✅ Strong JavaScript development skills (TypeScript, ES6), React.js, React Native ✅ Strong experience with Node.js ✅ Expertise in MongoDB / NoSQL databases ✅ Strong object-oriented programming and design skills ✅ Experience with RESTful web services ✅Ability to solve problems independently ✅ Outstanding teamwork and communication skills ✅ Understanding of modern Mobile technologies ✅ Ability to quickly learn new technologies Skills & Expertise: ✅ TypeScript ✅ Node JS (Express / Nest) ✅ MongoDB / MySQL / Firebase ✅ Third-Party API integrations Be sure, I'll provide you with: ✅ Clean, bug-free and highly structured source code, check please my GitHub ✅ Regular report of project status with relevant deliverable Looks like I'm a superman? I'll let you in my secret: I am a part of Kit Global team, actually, I am CEO of mobile development company, and in the past a very strong back-end dev. We want your story to be a successful one, so we develop solutions that help our clients' businesses to grow. With exposure to multiple industry verticals, we enjoy working on innovative challenges and amend our working process to cater to your expectations. However, we only accept projects that we can handle and never waste time for trial and error process development. I have a strong grip over developing these below-listed domain's app: ✅ E-Commerce Apps ✅ Social Networking Apps ✅ Taxi Apps ✅ Chat & Dating Apps ✅ E- Learning App ✅ Health & Fitness Apps ✅ Food Delivery Apps ✅ Photo Editing & Sharing Apps ✅ Travel Apps ✅ Music & Video Player Apps ✅Telemedicine As a bonus, I offer you: ✅Q/A testing, application deployment ✅Free consulting and support I believe that communication is the key to a successful project, so please let me know a time to discuss that works best for you!

I'm an experienced full-stack developer, specializing in both web and mobile application development. With React, Next.js, Node.js, and MongoDB, I build scalable and high-performing websites, while leveraging React Native to craft top-tier mobile apps for iOS and Android. With over 4 years in React, 2.5 years in React Native, and 1 year in Next.js, I bring a well-rounded skill set that delivers cross-platform solutions to meet any business need. 𝗪𝗵𝗮𝘁 𝗜 𝗢𝗳𝗳𝗲𝗿: 🌐 MERN Stack Website Development: Specializing in React for dynamic, responsive user interfaces, Next.js for server-side rendering and improved SEO, and Node.js for creating scalable back-end services. I build custom websites with a focus on speed, security, and user experience. 📱 React Native Mobile App Development: Expert in creating high-performance, cross-platform mobile apps that work seamlessly on both iOS and Android. Whether it’s an e-commerce app, a social platform, or a business tool, I ensure smooth user experiences with native-like performance. 🚀 𝗞𝗲𝘆 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: Custom Web Solutions: From responsive websites to complex SaaS platforms, I develop solutions tailored to your specific business needs using the MERN stack. Mobile App Development: Using React Native, I build robust mobile applications that work flawlessly across different devices, providing native-like performance and smooth animations. Server-Side Rendering with Next.js: Boost your website’s SEO and load speeds with Next.js, ensuring optimal user experience and higher search engine rankings. Performance Optimization: I specialize in optimizing both web and mobile apps, delivering smooth 60fps experiences that feel natural and fast. Ongoing Support & Maintenance: My commitment doesn’t end with project delivery. I offer long-term support and updates to ensure your site or app stays secure and current. 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲❓ 🌐 MERN Stack Expertise: Custom website development using React, Next.js, Node.js, and MongoDB. ⚛️ React Native Mastery: High-quality mobile apps with native-like experiences on both platforms. 🤝 Client-Centric Approach: I’m dedicated to meeting your project needs, providing high-quality work on time. Let’s build something great together! 𝙂𝙚𝙩 𝙞𝙣 𝙩𝙤𝙪𝙘𝙝, 𝙖𝙣𝙙 𝙡𝙚𝙩'𝙨 𝙙𝙞𝙨𝙘𝙪𝙨𝙨 𝙝𝙤𝙬 𝙬𝙚 𝙘𝙖𝙣 𝙘𝙧𝙚𝙖𝙩𝙚 𝙖𝙣 𝙤𝙪𝙩𝙨𝙩𝙖𝙣𝙙𝙞𝙣𝙜 𝙥𝙧𝙤𝙙𝙪𝙘𝙩 𝙛𝙤𝙧 𝙮𝙤𝙪𝙧 𝙪𝙨𝙚𝙧𝙨! ⚡

★ Apple evangelist ★ 100% Job Success ★ Top rated ★ 5.0 Star ★ Member of WWDC17 ★ I am a professional IOS developer with 4+ years track record. And I lead the team of Ukrainian iThinkers - focused on mobile applications. We are working on the UI/UX, Swift, Objective - C, Java. Our company was established in 2016 and since that we've completed more than 47 iOS and 3 Android projects, some of which are represented in our portfolio. iThinkers software outsourcing company deals with an extensive list of technologies, tools, and solutions to cope with many of existing challenges and foresee the future for you. The fact is the benefits of IT outsourcing are numerous, and our IT outsourcing company is here to help you avail all these benefits. As a custom outsourcing software developing company, we place special emphasis on our customers’ satisfaction. We guarantee the development of the upmarket products created in conformity with your requirements. Achieving this is possible only by means of a close cooperation with customers throughout the entire process of a project’s development. At iThinkers, we understand how important it is to create products that can be easily adjusted to the rapidly changing market requirements. To help you withstand a tough competition of your target market, our company uses only the most powerful tools and technologies that allow us to develop advanced software solutions. We work with numerous advanced technologies and guarantee a complete dedication to each project. If you are looking for a reliable, creative and experienced IT outsourcing company in Ukraine, you have to come to the right place, as iThinkers will eagerly become your longtime partners. We are looking forward to our cooperation​!

🚀 Backend Developer & Automation Specialist Turning complex systems into efficient, scalable solutions 🧠 I don’t just write code - I build systems that work tirelessly for your business. With 3+ years of hands-on experience, I specialize in backend development, automation, and advanced data extraction from complex and protected sources. ⚙️ What I Do 🔹 Design and build robust backend architectures 🔹 Develop REST APIs and internal services 🔹 Automate repetitive and business-critical workflows 🔹 Extract data from open & hidden APIs (JSON / CSV) 🔹 Scrape websites with CloudFlare protection, lazy-load, and dynamic rendering 🔹 Create human-like scrapers with user behavior simulation 🔹 Build admin panels, dashboards, and data pipelines 🕷️ Advanced Web Scraping & Data Extraction 🌐 Modern websites are complex - and that’s exactly where I’m strongest. ✅ CloudFlare & anti-bot systems ✅ JavaScript-heavy websites ✅ Lazy-load / infinite scroll ✅ Session-based & token-protected APIs ✅ Private / undocumented endpoints 📦 Output formats: - JSON - CSV - Databases (PostgreSQL, MySQL, MongoDB) - Admin panel or REST API service (Django admin / Swagger) - Source Code 🤖 Automation That Never Sleeps ✨ I develop large-scale, long-running automation systems that: - run 24/7 - scale with your business - reduce manual work - eliminate human error From simple scripts to enterprise-level automation pipelines, I focus on reliability, maintainability, and performance. 🧩 Tech Stack 💻 Backend - Python (FastAPI, Django) - Async & high-load systems 🗄️ Databases - PostgreSQL - MongoDB - Redis - Firebase - AWS S3 - SQLite 🧪 Automation & Scraping - Requests / HTTPX - BeautifulSoup4 - Selenium / Playwright - Browser automation - API reverse-engineering ☁️ Deployment & Ops - Linux servers - Cron jobs & background workers - CI/CD - GIT 🌟 Why Clients Choose Me 🔥 Not just a coder — a problem solver 🔥 Clean, readable, production-ready code 🔥 Strong focus on business logic, not just features 🔥 Honest communication & clear estimates 🔥 Systems built to scale, not to break 🏆 My Philosophy “If it can be automated - it should be automated.” “If data exists - it can be extracted.” 📬 Let’s Build Something Powerful Whether you need: - a custom scraper - a backend REST API - a business automation system 👉 I’m ready to help you turn complexity into clarity. 🚀 Let’s automate. Let’s scale. Let’s win.

Greetings! With an extensive background in cross-platform app development, I specialize in transforming creative ideas into functional, high-quality software. Skills and Expertise: - App Development: Proficient in building apps for iOS and Android using the Flutter and FlutterFlow frameworks, offering seamless user experiences. - Dart Programming: In-depth knowledge of the Dart language, enabling efficient development and problem-solving. - UI/UX Design: A keen eye for design, creating pixel-perfect, intuitive user interfaces that enhance user engagement and retention. - Third-Party Integrations: Skilled in integrating APIs, plugins, and libraries to add functionality, including Firebase, REST APIs, and more. - State Management: Proficiency in state management techniques like Provider, BLoC, Redux, and MobX for efficient app data handling. - Version Control: Experienced with Git and collaborative development workflows, facilitating seamless teamwork. - App Deployment: Knowledge of app submission and deployment processes on Google Play Store and Apple App Store. Let's work together to turn your app idea into a reality. Reach out today to discuss your project's unique requirements and take the first step toward creating a powerful, user-friendly mobile application.

I am a Software Engineer with 2 years of experience in Front-end development. I have a strong proficiency in Next.js and Redux, which I have learned to build dynamic and responsive web applications. In addition to my front-end expertise, I have hands on experience with Backend Development using Node.js and Express. I have strong communication skills that will help solving problems together with team Skills: 🔷React.js 🔷Next.js 🔷Redux 🔷Prisma 🔷MySQL, MongoDB, PostgreSql , SupaBase and etc... 🔷FramerMotion, Gasp 🔷Node.js,Express, Nest,js 🔷Html, Css, Scss