Hire the Best JavaScript Developers
in Indonesia

Stuck with a legacy .NET or PHP system nobody wants to touch, a third-party integration that keeps breaking, or a mobile app that needs to ship without slowing down your web platform? I build and maintain production systems that hold up under real business use - enterprise software, web platforms, and mobile apps that don't fall over as they grow. Hi, I'm Yusrizal 👋 Senior Full-Stack Developer with 18+ years of experience across EdTech, government, energy, and healthcare. Top Rated on Upwork, 100% Job Success, 90+ companies served. I've solved problems like: - Cut redundant authentication requests ~60% by adding Redis caching to a production auth service for Pertamina, Indonesia's national energy company - Built a national partnership-data platform for Indonesia's Ministry of Education to manage vocational-education partnerships - Automated a PHP microservice that parses real-time XML feeds to keep product pricing and discounts in sync across systems - Integrated a government digital-signature API (PERURI) so a state polytechnic could issue legally valid digital diplomas - Replaced fingerprint check-in with a React Native attendance app for remote staff - Founded and led an EdTech startup (school management/LMS) that won a national tech-incubation award What I can help you with: - Enterprise & Backend Systems → C#/.NET (Core, Framework, ASP.NET) + SQL Server for business-critical systems - Web Platforms & APIs → PHP (Laravel, Yii2, CodeIgniter) + MySQL/PostgreSQL, REST API design and integration - Mobile Apps → React Native + Firebase/Expo, cross-platform iOS/Android - Payments & Integrations → Midtrans, PayPal, CryptAPI, government APIs, XML feeds, IoT data - Performance & Reliability → caching (Redis), query/API optimization, cutting redundant load - Cloud & Deployment → AWS (S3, EC2, Amplify), DigitalOcean, Git Tech I use (when it actually fits the job): - Backend: C# / .NET (Core, Framework, ASP.NET), PHP (Laravel, Yii2, CodeIgniter), Node.js - Frontend/Mobile: React, React Native, Expo, Firebase - Database & Caching: SQL Server, PostgreSQL, MySQL, NoSQL, Redis - Integrations: REST APIs, Midtrans, PayPal, CryptAPI, PERURI, XML, IoT - Infra: Microsoft Azure, AWS (S3, EC2, Amplify), DigitalOcean, Git - AI-assisted workflow: Claude, GitHub Copilot, ChatGPT, DeepSeek - Collaboration: Jira, Trello, Agile How I work: - I focus on delivering working systems, not just code - Comfortable owning a project end-to-end (requirements → architecture → deployment) or slotting into an existing team - AI-assisted development helps me move faster - every change still gets reviewed and tested the same as it would without it - I pick the simplest stack that will actually hold up in production, not the trendiest one - 18+ years means I've led teams (as a startup CEO and as a platform lead) and worked solo - I adapt to what the project needs I take on projects I'm confident I can deliver well. If you need .NET, PHP, or React Native work - building something new, or fixing and scaling an existing system — send me a message and let's talk specifics. 🚀

I am a Fullstack Web Developer, with a primary focus on back-end development. My main programming language is JavaScript, and I work extensively with technologies like React, Angular, ExpressJS, and NestJS. I have a strong passion for exploring new programming trends and methods, always seeking to stay up-to-date with the latest in tech. In my free time, I enjoy diving into personal projects or learning new tools and techniques to expand my expertise and enhance my problem-solving skills.

I am using WXT Framework, and I am also a Plasmo Framework Contributor Code since 2008, I can assist founders across the research, development, and marketing stages to build a profitable business. Most of my work is focused on building practical solutions using APIs, Chrome Extensions, N8N, Google Sheets, and AI tools. ⚙️ I work on projects like: ✅ *𝐌𝐞𝐞𝐭𝐫𝐢𝐜* - AI Meetings tools ✅ *𝐒𝐡𝐨𝐩𝐢𝐭𝐨𝐨𝐥* - Shopify Product Management ✅ *𝐒𝐞𝐥𝐥𝐞𝐫𝐰𝐢𝐳* - Amazon seller tool ✅ *𝐊𝐢𝐰𝐢 𝐰𝐚𝐥𝐥𝐞𝐭* - Discount tool like Honey ✅ *𝐋𝐞𝐦𝐩𝐨𝐝* - Research for Linkedin User Session Sync ✅ *𝐋𝐞𝐚𝐝𝐟𝐰𝐝* - Linkedin Scraper & automation ✅ *𝐏𝐨𝐮𝐧𝐜𝐡𝐞𝐫𝐀𝐢* - Scraper for Upwork Profile analyzer ✅ *MusaView* - Musa Font Enabler 💼 WHAT MY CLIENTS SAY ⭐⭐⭐⭐⭐ "Agung was able to fix a problem that could have potentially affected our business. We will definitely rehire him in the future!" ⭐⭐⭐⭐⭐ "From the beginning we had a plan first before he ever accepted the job. He wanted to make sure he knew what I was looking for. He has the skills to build whatever you need. I strongly suggest if you need any web related or development related work done. Hit Agung up! Thanks again man. We'll have another job very soon bro!" Less ⭐⭐⭐⭐⭐ "I hired Agung to work on a complicated R&D project involving browser extension development. He did amazing work and was able to solve the problem. To my knowledge there is no public reference to how to solve this problem, and I looked pretty hard, so based on my experience it seems Agung is probably one of the top browser extension developers in the world. Highly recommended!" ⭐⭐⭐⭐⭐ "Agung did a great job with a Chrome extension we needed for a State of Nebraska website. We provided Agung with a list of criteria and he was able to make an extension that was even better than what we hoped for. We would definitely hire him again for future projects" Less 🤔 WHY WORK WITH ME ? - I build custom integrations using React, Node.js, Python, PHP, and Google Apps Script. - I prefer simple, reliable solutions that solve real business problems. - In most cases, I choose custom development over no-code tools because it gives more flexibility and long-term stability.

Dmitry Bay, 33 years old Was outside from Upwork for 2 years, now want to start again. With MVP projects, where time and speed is matter. PHP Backend Developer Experience: 10+ years Skills: Backend: PHP (Yii2, Laravel), Redis, AWS, MySQL (optimization for Highload) Frontend: JS, TypeScript, React.js, jQuery, Bootstrap (3, 4, 5) Integrations and Payment Systems: Stripe, Klarna, Dwolla, Plaid Other: Linux (administration), experience with PROXY/CDN systems, integration of external APIs and analytics systems, Telegram bot development (including payments and support) Experience (Last 5 years): • Leading a development team • Designing projects architecture and CRM systems • Setting up PROXY/CDN and integrating external APIs • Integrating payment services and analytics systems • Deep work with Telegram bots • Backend development for the mobile application • Optimizing SQL queries and database performance Ask me about other skills. Regards, Dmitry.

Top Rated Full stack web developer help you build modern websites and scalable web applications that look great and work perfectly on all devices. WHAT I DO Frontend: React.js, Next.js, Vuejs, Astro, Responsive Web Apps Backend: Nest.js, Express.js, Laravel, REST API integration Test: Jest, Vitest, Playwright, Cypress Database: MYSQL, PostgreSQL, Supabase, MongoDB CMS: Wordpress, Sanity.io Design: Convert Figma designs into pixel-perfect websites Deployment: Fast hosting on Vercel, Netlify, Firebase, AWS SEO: Google Analytics, Google Search Console WHY CHOOSE ME ✅ Clean, professional code ✅ Mobile-first responsive design and pixel perfect based on design ✅ Fast delivery without compromising quality ✅ 100% client satisfaction guaranteed RECENT PROJECTS E-commerce websites with payment integration Business dashboards and admin panels Landing pages that convert visitors to customers Custom web applications Ready to start your project? Send me a message with your requirements and I'll respond within 2 hours with a clear plan and timeline. #sanity #sanitycms #sanity.io #reactjs #nextjs #tailwind #tailwindcss #typescript # laravel #nestjs

🟡 𝗨𝗽𝘄𝗼𝗿𝗸 𝗥𝗶𝘀𝗶𝗻𝗴 𝗧𝗮𝗹𝗲𝗻𝘁 | 𝗙𝘂𝗹𝗹-𝘁𝗶𝗺𝗲 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆. 🟡 3+ 𝗬𝗲𝗮𝗿𝘀 of Full-Stack Development across Next.js, React, and Node.js back-end APIs. 🟡 𝗣𝗿𝗼𝗱𝘂𝗰𝘁-𝗼𝗿𝗶𝗲𝗻𝘁𝗲𝗱 + 𝗛𝗶𝗴𝗵 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗰𝗼𝗱𝗲 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 (clean, maintainable, scalable, pixel-perfect). Hi there! I'm a Full-Stack TypeScript/JavaScript Developer who builds exceptional, lightning-fast user experiences with modern front-end technologies such as React, Next.js paired with robust backend systems like Node.js, Express.js, Nest JS also with MySQL. ⚒️ 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 + 𝗡𝗼𝗻-𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀 𝗢𝘃𝗲𝗿𝘃𝗶𝗲𝘄 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Next.js App Router (14, 15, 16), React, TypeScript, JavaScript, Tailwind CSS, Framer Motion, GraphQL & REST API Integration, Redux, Zustand, Context API, Webpack, Vite, SEO-optimized SSR/ISR, Accessibility (a11y) principles. 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Node.js, Nest.js, Express.js, PostgreSQL, MySQL, Prisma, TypeORM, Third-party integrations. 𝗧𝗼𝗼𝗹𝘀 & 𝗗𝗲𝘃 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲𝘀: Cursor AI, Windsurf AI, Claude, CodeRabbit, Notion, LinearApp, GitHub, GitLab, Git, Docker, CI/CD setups, unit/Integration testing. 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹: Proactive Communication & Collaboration, Ownership & Product Mindset 🧑‍💻 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜'𝘃𝗲 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗲𝗱 𝗳𝗼𝗿: - Custom Applications (Travel Tech, Specialized Portals) - SaaS Platforms (Multitenant capable) - E-commerce Solutions - FinTech - Insurance - Social Media Collaboration Platform - High-Impact Marketing Websites / Brand Platforms Leveraging modern stacks like Next.js and TypeScript, I ensure each solution is fast, secure, interactive, and built upon a foundation of clean, scalable code designed for long-term success. 📞 𝗛𝗮𝘃𝗲 𝗮 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗶𝗻 𝗺𝗶𝗻𝗱 𝗼𝗿 𝗻𝗲𝗲𝗱 𝗲𝘅𝗽𝗲𝗿𝘁 𝗵𝗲𝗹𝗽 𝗶𝗻 𝘆𝗼𝘂𝗿 𝗰𝘂𝗿𝗿𝗲𝗻𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁? 𝗥𝗲𝗮𝗰𝗵 𝗺𝗲 𝗼𝘂𝘁 𝗮𝗻𝘆𝘁𝗶𝗺𝗲! 𝗜 𝘄𝗶𝗹l 𝗿𝗲𝗽𝗹𝘆 𝗮𝘀 𝗳𝗮𝘀𝘁 𝗮𝘀 𝗽𝗼𝘀𝘀𝗶𝗯𝗹𝗲 𝗼𝗿 𝘄𝗲 𝗰𝗮𝗻 𝘀𝗰𝗵𝗲𝗱𝘂𝗹𝗲 𝗮 𝗾𝘂𝗶𝗰𝗸 𝗰𝗮𝗹𝗹 𝘁𝗼 𝗮𝗹𝗶𝗴𝗻 𝘆𝗼𝘂𝗿 𝗴𝗼𝗮𝗹𝘀 𝗮𝗻𝗱 𝘁𝗶𝗺𝗲𝗹𝗶𝗻𝗲. --------------------------------------------------------------------------------------------------------------------- 𝑲𝒆𝒚𝒘𝒐𝒓𝒅𝒔: Next.js, React.js, TypeScript, JavaScript, Node.js, Nest.js, Supabase, Tailwind CSS, Frontend Development, Full-Stack Development, Backend Development, API Integration, REST API, GraphQL, PostgreSQL, MySQL, Docker, AWS, Vercel, Performance Optimization, Clean Code, Software Architecture, AI Code Assistant (Cursor, Windsurf), Framer Motion, Accessibility (a11y), Software Engineer, Frontend Engineer, Full Stack Engineer, Web Developer, Remote Developer, Freelance Developer, SaaS Development, Multitenancy, User Experience (UX), User Interface (UI), Scalability, Maintainability.