Kurniawan
Frontend Developer | ReactJS Specialist | MERN Stack Developer
About Me
Senior ReactJS Developer with 7+ years of experience in architecting scalable web applications and 9+ years as a Frontend Engineer. Proven track record in delivering high-performance solutions, optimizing CI/CD workflows, and leading frontend initiatives. Expert in reacting to complex business requirements with innovative technical solutions, bridging the gap between design and engineering to create exceptional user experiences. Consistently recognized for excellence on Upwork, building lasting partnerships with global clients through dependable delivery and superior code quality. Advanced proficiency in AI-assisted development environments (Cursor, Claude Code, Antigravity) to accelerate delivery.
Work Experience
- Architected and deployed multiple enterprise-grade React applications, ensuring pixel-perfect implementation of UI/UX designs.
- Established long-term partnerships with global clients by consistently delivering robust, scalable, and maintainable codebases.
- Implemented modern frontend practices including component encapsulation, state management strategies, and performance optimization techniques.
- Engineered immersive, game-like web experiences using React and Babylon.js, pushing the boundaries of browser-based performance.
- Optimized asset loading and rendering pipelines for 3D environments, implementing sprite sheet management and complex animation states.
- Collaborated closely with designers to translate creative visions into interactive, high-fidelity technical implementations.
- Designed and developed secure, scalable RESTful APIs using Node.js and Express, ensuring seamless data flow for client applications.
- Built responsive, accessibility-compliant React user interfaces that significantly improved user engagement and retention.
- Integrated complex third-party services, including PayPal subscription models, enabling secure and reliable monetization flows.
- Led the development of high-performance React applications, optimizing bundle sizes and rendering performance for improved Core Web Vitals.
- Developed a comprehensive library of reusable UI components, reducing development time for new features by 40%.
- Mentored junior developers on React patterns, state management best practices, and clean code principles.
- Facilitated seamless API integrations with external partners, ensuring data consistency and reliability across distributed systems.
- Developed cross-platform applications leveraging React Native and ElectronJS, delivering consistent experiences across Web, iOS, Android, and Desktop.
- Contributed to the full development lifecycle, from technical specification to deployment and maintenance.
- Delivered end-to-end web solutions using the React ecosystem, successfully managing project timelines and client expectations.
- Implemented full-stack features with focus on code modularity and database optimization.
- Built responsive corporate websites using HTML5, CSS3, and JavaScript, ensuring cross-browser compatibility.
- Integrated PHP backends with custom frontend logic to create dynamic user experiences.
Technical Skills
Featured Projects
A curated selection of my technical work, featuring full-stack applications and high-performance interfaces.
A web-based application designed to assist with construction calculations and technical building work. The system utilizes building design images as the basis for accurate calculation results.
- Built visual-based calculation interfaces
- Implemented complex workflows for construction requirements
- Optimized UX for non-technical users
An online utility platform offering multiple file-processing tools, developer utilities, and AI-powered text and content generation.
- Developed multi-tool frontend dashboards
- Integrated AI-based content generation features
- Designed a scalable and modular application architecture
An automotive platform by Astra that provides used car buying and selling services, trade-in options, and vehicle maintenance services.
- Implemented marketplace UI for automotive services
- Improved performance and responsiveness
- Collaborated closely with backend teams and stakeholders
A digital news portal delivering up-to-date information with a dynamic and accessible content structure.
- Built responsive news layouts
- Enhanced readability and mobile experience
- Integrated dynamic content systems
A web application that allows users to upload datasets and visualize them through interactive charts with advanced analytical features.
- Implemented advanced charting systems
- Interactive features including zoom, scale, moving average, and dual Y-axis
- Focused on performance and user interaction
An internal company application designed to support daily employee activities. Features include internal calendar, meeting room booking, employee chat, and company announcements.
- Mobile-first UI implementation
- High usability for internal users
- Integration with backend services
A specialized web platform focused on carpentry and wood management. The website provides a directory of carpenters and comprehensive tools for managing wood-related data.
- Developed fullstack architecture using Django (backend) and React.js (frontend)
- Built dynamic and responsive user interfaces
- Implemented data-driven features for wood measurement and calculation
A store management website designed to help businesses manage daily operational activities efficiently.
- Built fullstack web application using React.js and Django
- Developed admin-friendly dashboards
- Implemented REST API integration between frontend and backend
Connect-Link is a digital profile platform similar to Linktree, allowing users to create a single personalized page to showcase links, social media profiles, and online presence.
- Developed fullstack application using Next.js, Node.js, and MongoDB
- Designed REST APIs and database schemas
- Implemented responsive and modern UI
Education
Bachelor Degree in Information Technology (IT)
Information Technology (IT)