Hire the Best React.js Developers
in Slovakia

Hello! I'm Andras Petrovci, a versatile Full Stack Java Developer with a passion for creating efficient, scalable, and user-friendly web applications. With over 7 years of experience, I've honed my skills in both frontend and backend development, working with cutting-edge technologies and frameworks. 🔧 What I Offer: - Frontend Development: Expertise in HTML5, CSS3, JavaScript (ES6+), React.js, Vue.js, Typescript. I build responsive, intuitive interfaces with a focus on user experience. - Backend Development: Proficient in Java (8-17), Spring Boot, Node.js, and Docker. I develop robust APIs and services with a focus on security and scalability. - Database Management: Experience with Postgres, MongoDB, MariaDB and MySQL. I ensure data integrity and optimize database performance. - DevOps & Cloud: Familiar with AWS, CI/CD pipelines, and containerization. I streamline deployment processes for reliable and efficient releases. - Project Management: Skilled in Agile methodologies using tools like Jira and BitBucket. I manage projects effectively, from initial concept to final delivery. 🛠 Key Projects: - Cargo B.V.: Developer of car management platforms, including complex refactoring and maintenance tasks. Built complicated modules with customs and other API integrations. - Kovit B.V.: Developed campaign management systems and internal messaging platforms. Worked extensively with Vue.js and Pinia Store for frontend and JWT for secure user authentication. Also built large parts of backend in Java. - Advan Security B.V.: Full application development using React, NextJS, NodeJS, Tailwind, Prisma, PostgreSQL. Internal platform for security company with workers location tracking, reports, hours tracking etc. 🚀 Why Choose Me? I am committed to continuous learning, regularly updating my skills, learning some new skills. My ability to adapt to new technologies and frameworks ensures that I can meet the evolving needs of your projects. Enterprise development methodology for all projects!

📈 REDUCING Development Time, INCREASING ROI | Building efficient & scalable web apps via expert React js, Next.js, TypeScript & Node.js development. Get your React.js project delivered faster. 🚀 Contributed to enhancing internal systems (React.js, Next.js, TypeScript) for a major European telecom (50k+ employees); these improvements led to a 40% boost in workflow efficiency shortly after launch. Need a proven React.js Developer for complex challenges? 👨‍💻 𝐀𝐁𝐎𝐔𝐓 𝐌𝐄 & 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐎 I'm a dedicated Full-Stack Developer with 5+ years of experience, specializing in building robust and scalable web applications, with a focus on React.js, Next.js, TypeScript, and Node.js. I enjoy taking complex ideas and transforming them into clean, efficient, and user-friendly digital products from scratch. Whether you need a rich single-page application, a top-tier enterprise solution (like the ones I've developed for major telecommunication companies), or a cutting-edge e-commerce website, I possess an end-to-end skill set that includes front-end development (pixel-perfect UI, responsive design with tools like TailwindCSS) and back-end development (REST/GraphQL APIs, database modeling with MongoDB/PostgreSQL). My top priority is always to deliver value to my clients by creating applications that are not only visually appealing (React js, Next js) but also high performing, maintainable, and achieve some business objectives. I've collaborated with companies to automate workflows and enhance their online presence with custom React.js solutions. 💻 𝐌𝐘 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 & 𝐓𝐎𝐎𝐋𝐒 I use cutting-edge technologies to develop high-quality, scalable, and high-performance web applications. My key expertise includes: 📌 Front-End: React.js, Next.js, TypeScript, JavaScript (ES6+), T3 Stack, HTML5, CSS3, TailwindCSS, SASS/SCSS, Redux, Zustand, Material UI 📌 Back-End: Node.js, Express.js, REST APIs, GraphQL, Serverless Functions (AWS Lambda) 📌 Databases: MongoDB, PostgreSQL, Firebase (Firestore/Realtime Database) 📌 DevOps & Cloud: Docker, AWS (S3, EC2), Vercel, Netlify, CI/CD (GitHub Actions/GitLab CI) 📌 UI/UX Design: Figma, Adobe XD 📌 Version Control: Git, GitHub, GitLab 📌 AI API: OpenAI, Google Gemini. 📌 Payment API: PayPal, Stripe, etc. 📌 Social API: Google, Facebook, Twitter, Facebook, Instagram, YouTube, Reddit, Snapchat, Pinterest, Viber, Telegram, Twilio. 📌 Testing: Jest, React Testing Library, Cypress 📌 Project Management & Collaboration: Jira, Trello, Slack, Asana 💡 𝐌𝐘 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓 𝐏𝐑𝐎𝐂𝐄𝐒𝐒: DELIVERING YOUR REACT.JS & NEXT.JS PROJECT I prioritize clear communication and a structured web application development process to ensure your project's success. Here’s my typical approach when collaborating on React.js and Next.js projects: 1. Discovery & Planning: We start with a thorough discussion to completely understand your project goals, needs, target market, and business objectives. I'll help define the scope, features, and the optimal technical solution for your React.js or Next.js application. 2. UI/UX Design (if applicable): Where needed, I can work from your designs (like Figma mockups) or collaborate on creating intuitive, user-friendly interfaces optimized for React.js components and a seamless user experience. 3. Full-Stack Development ( React.js | Next.js | NodeJS ): Your application is then built using clean, readable code and best practices for React.js development, TypeScript, and Node.js integration. This includes robust front-end development and efficient back-end development (e.g., API development). You'll receive regular progress updates during development sprints. 4. Testing & Quality Assurance: Robust testing is performed to ensure the React application is error-free, performs quickly (high-performance), and fulfills all specifications across different devices and browsers. 5. Deployment & Launch: I assist with deploying your React / Next.js application to modern hosting platforms like Netlify, Vercel, or AWS, ensuring a smooth and efficient launch using DevOps best practices where applicable. 6. Post-Launch Support & Maintenance (Optional): I provide ongoing support and maintenance packages to keep your web application running smoothly, securely, and up-to-date. Throughout the Full-Stack development process, I maintain transparency, clear communication, and focus on delivering a high-quality web application that aligns with your vision. ⭐️ 𝐖𝐇𝐀𝐓 𝐌𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐒𝐀𝐘 𝐀𝐁𝐎𝐔𝐓 𝐌𝐄: ⭐️⭐️⭐️⭐️⭐️ "Nazarii was key in enhancing our React | Next.js e-commerce store. He expertly fixed complex bugs and significantly improved performance & UX. Clear communication and a highly skilled React.js developer. Recommended!" - Greg С. 🇺🇸 ⭐️⭐️⭐️⭐️⭐️"Nazarii built our restaurant's online payment system with React . It works great and streamlined everything. Great work!" - Jan V. 🇳🇱 Let's discuss your project! Click "Invite to Job" above! 💪