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Hello! I’m a versatile professional with 6 years of experiences and a strong background in social media management, WordPress development, and administrative tasks. With hands-on experience in handling client communications, designing engaging content, and managing financial records, I bring a holistic approach to supporting businesses in their digital and operational needs. My skills & services: 1. Administrative Support: • Managed accounts payable and receivable, ensuring timely processing of invoices. • Organized and archived essential documents, maintaining efficient record-keeping systems. • Proficient in Google Workspace and Microsoft Office Suite, facilitating smooth administrative operations. • Inquiry Handling & Communication, monitored and managed client email inboxes, responding promptly to inquiries and routing messages to the appropriate team members. • Email & Schedule Organization, structured and organized digital workspaces, email filing systems, and calendars to streamline daily operations. • Data Entry & Management, accurately entered, organized, and audited operational and competitor data to maintain clean, reliable record-keeping systems. 2. Digital Marketing & Content Strategy (Social Media Management): • Multi-platform campaigns, planned and executed content strategies across Meta (Facebook & Instagram), LinkedIn, Threads, YouTube Shorts, and Google Business Profiles to drive community engagement and brand awareness. • SEO & search visibility, conducted keyword research, optimized on-page content, and monitored site performance using Rank Math and Google Search Console to improve organic search rankings. • Ad operations & targeting, managed local and international audience targeting parameters within Meta Business Manager, optimizing ad reach and ad policy compliance for client campaigns. • Content creation & scheduling, authored compelling promotional copy, designed visual assets using Canva, and coordinated cross-platform content distribution schedules tailored to specific audience peak times. • Local SEO & listings: Managed Google Business Profiles and directory listings, managing client data accuracy and monitoring competitor trends to maximize local map and search visibility. 3. WordPress Development & Website Optimization (SEO): • Custom website development, built and customized responsive WordPress websites using Elementor, WPBakery, and premium themes tailored to client requirements. • SEO Implementation & Technical Optimization, optimized site structure, meta tags, and content using SEO plugins (Yoast SEO, Rank Math) and monitored site performance, indexing, and search visibility via Google Search Console. • Plugin & E-Commerce integration, integrated and configured key site functionalities, including WooCommerce, Mailchimp, Contact Form 7, and custom form workflows. • Agency collaboration, partnered with external agencies as an outsourced developer to deliver high-performing, mobile-responsive, and SEO-friendly websites on schedule. • Core web technologies, applied foundational knowledge of HTML, CSS, and PHP to troubleshoot layout issues, customize theme styles, and enhance overall user experience. Tools & platforms: 1. Google Workspace & Microsoft Office 2. Notion & Trello 3. Canva, Figma, Adobe Photoshop, Adobe Lightroom, & Capcut 4. Gemini, Claude, ChatGPT, Perplexity 5. Meta Business, Facebook, Instagram & LinkedIn 6. Google Search Console & Google Business 7. Zoom & Google Meet 8. Discord Why Choose Me? • Tech-savvy and quick to adapt to new tools and platforms. • Strong communication skills, ensuring clarity and efficiency in all tasks. • Dedicated to delivering high-quality work that aligns with client objectives. Let’s collaborate to bring your projects to fruition with precision and creativity!

𝗜𝗻𝗱𝗼𝗻𝗲𝘀𝗶𝗮-𝗯𝗮𝘀𝗲𝗱 𝗵𝗮𝗻𝗱𝘀-𝗼𝗻 𝗺𝗼𝗯𝗶𝗹𝗲 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿 specializing in iOS, Android, and Flutter, with 𝟮+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 and 𝟭𝟬+ 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽𝘀 built and shipped. I maintain a 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 𝗦𝗰𝗼𝗿𝗲 on Upwork.. I help founders, startups, and product teams turn product ideas and Figma designs into structured, responsive, and maintainable mobile applications. My work covers mobile app architecture, REST API integration, authentication, native device features, debugging, refactoring, performance optimization, and App Store or Google Play release preparation. Projects can be supported from early product requirements and MVP planning through development, testing, TestFlight distribution, App Store submission, and Google Play deployment. 𝗣𝗥𝗢𝗗𝗨𝗖𝗧 & 𝗠𝗩𝗣 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 • Translating product ideas into clear technical requirements • Mobile MVP planning and feature scoping • Prioritizing features based on user and business needs • Writing specifications, user flows, and acceptance criteria • Organizing development into clear and reviewable milestones • Evaluating architecture decisions and technical trade-offs • Collaborating through Git, GitHub, branches, and pull requests • Supporting user-centered product and UX decisions 𝗛𝗢𝗪 𝗜 𝗖𝗔𝗡 𝗛𝗘𝗟𝗣 • Build a native iOS application using SwiftUI or UIKit • Develop a Flutter application for iOS and Android • Turn an early-stage product idea into a structured mobile MVP • Convert Figma designs into responsive mobile interfaces • Integrate REST APIs, Firebase, Supabase, and authentication • Add camera, OCR, maps, machine learning, or device capabilities • Implement new features in an existing mobile application • Diagnose and fix bugs, crashes, and performance problems • Refactor generated, legacy, or difficult-to-maintain mobile code • Prepare an application for TestFlight, App Store, or Google Play release 𝗪𝗛𝗬 𝗪𝗢𝗥𝗞 𝗧𝗢𝗚𝗘𝗧𝗛𝗘𝗥? • Product, design, and technical considerations are evaluated together. • Progress, decisions, risks, and trade-offs are communicated clearly. • Development is organized into manageable and reviewable iterations. • Usability, performance, maintainability, and visual details receive equal attention. • The focus is on dependable, long-term collaboration rather than isolated code delivery. Projects are approached from both technical and product perspectives. The goal is not only to deliver working features, but also to build mobile applications that are intuitive, maintainable, scalable, reliable, and aligned with real user needs. 𝗜𝗳 𝘆𝗼𝘂 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗺𝗲 𝘄𝗶𝘁𝗵: (𝟭) what you are building, (𝟮) your current team setup, whether in-house, outsourced, or still being formed, and (𝟯) your target launch date, I will propose the 𝗳𝗮𝘀𝘁𝗲𝘀𝘁, 𝗹𝗼𝘄𝗲𝘀𝘁-𝗿𝗶𝘀𝗸 𝗽𝗮𝘁𝗵 to a shippable mobile release and outline the technical priorities needed to support its further growth.

🚀 Senior Frontend & Mobile App Developer | React, React Native, Next.js & Expo I’m a Software Engineer with 5+ years of experience building modern, scalable, and high-performance web and mobile applications using React, React Native, Next.js, Expo, TypeScript, and Astro. I bring a founder-level mindset to every project. I don’t just write code I focus on understanding the business problem, creating meaningful user experiences, and building reliable products that can grow and scale sustainably. Whether you need a responsive website, cross-platform mobile app, SaaS dashboard, e-commerce platform, landing page, or a complete frontend redesign, I can help turn your idea into a polished, production-ready product. ✅ Work directly with me, no agencies or outsourced teams ✅ Fast and transparent communication ✅ Clean, maintainable, and scalable code ✅ Responsive and pixel-perfect UI implementation ✅ Product-focused development, not just code that works ✅ Experience publishing apps to the Apple App Store and Google Play Store ## 💼 Services I Provide 🚀 Frontend Development with React, Next.js, Astro, and Svelte 📱 Cross-Platform Mobile App Development with React Native and Expo 🛒 E-commerce Website and Platform Development 🧠 SaaS Dashboard and Admin Panel Development 🎨 UI/UX Redesign and Frontend Modernization 🧩 REST API, GraphQL, and Third-Party Service Integration 📦 iOS and Android App Publishing 🛠️ React Native, Expo, SDK, and Package Upgrades 📄 Company Profile, Marketing Website, and Landing Page Development 🌐 WordPress Frontend Customization 🧱 Design System and Component Library Development with Storybook ⚡ Performance Optimization and Bug Fixing ## 🧠 Tech Stack Languages JavaScript, TypeScript Frontend & Mobile React, Next.js, React Native, Expo, Astro, Svelte, Framer Motion UI & Design Systems Tailwind CSS, shadcn/ui, Material UI, Ant Design, Flowbite, Storybook State & Data Management TanStack React Query, SWR, Redux Toolkit, Zustand, GraphQL Backend & Integrations Supabase, Firebase, OneSignal, Headless CMS, REST APIs, Third-Party APIs I’m comfortable working on both new products and existing codebases, from building an MVP from scratch to improving performance, upgrading dependencies, fixing complex issues, or redesigning an existing application. Have a web or mobile app idea? Send me a message and let’s discuss how to turn it into a scalable, user-friendly product.

🏅 Top Rated Plus - Native Android Expert, focusing on performance and code readability. 👋 Your time can't be reimbursed, so let's save your precious time, and see about me. I am an Ex-Samsung Engineer. I have: • Published Android library (via JitPack). • Contributed to Open Source projects. • Collaborated with clients from across different countries, including Singapore (7+ years), Korea (2 years), Sweden (1.5 years), and others. • Launched several Android applications on the Google Play Store. • Created hard-to-kill app that is compliance with Google Play Store. • Finished my bachelor's degree. During that time, I had a privilege to be an assistant with subjects: Automation and Introduction to Compilation + Data Structure assistant at my university. • Done some backend work (adding features, bug fixing, writing Unit Tests and Integration Tests) using NodeJS, with a TDD (Test Driven Development) approach. I have written approximately 400 test cases (and growing!). Having experience in both client and server development allows me to understand and spot bugs faster, either from the client's or the server's side. As a developer, I love competition. I was: • 🥉 3rd Winner Lumia Apps Olympiad (Lintas.ME category) • 🏆 Chosen as one of the 12 best Hackonten Applications. • 🏅 Lumia Apps Challenge Champion at the University of Indonesia. • 🥉 3rd Computer Olympiad Champion (Tulungagung, Indonesia). Languages are just tools, and here are my favorites: • Kotlin • Java • C# • Dart • Javascript • ActionScript And here are the key technologies that I have worked with (including but not limited to): • Android Framework (ViewModel, LiveData, Room, Threads, GPS, Bluetooth, Codec, Location, AudioTrack) • Firebase • Websocket • MVVM • Jetpack Compose • Dependency Injection (Hilt) • Flutter, with Bloc as state management • Xamarin • NodeJS (with Sails framework, that based on Express) • Redis • AWS (EC2, RDS, S3, Route53) • Minio • Unit Testing (Android Unit Test) • Integration Testing (Mocha) • Katalon • WPF (Windows Presentation Foundation) • Windows Phone • Azure Pipelines • Github Actions All of my projects that I've posted below are fully done by ME, so you can rest assured knowing that your work will NOT be outsourced to someone else. I always strive to provide the highest quality of work and will NEVER complete a project until the client is 100% satisfied. Thank you, and have a great day! 🌟

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. 🚀

Fluent in Linux (since 1999), able to setup linux based services (email, web, ftp, monitoring, proxy, virtualization, firewall, QOS, etc). Cisco Certified CCNA++, Sun Solaris Certified (SCSA, SCNA), Redhat Certified (RHCT), Linux Foundation Certified Engineer (LFCE), Ubiquity Certified Trainer (UBWA, UBWS), Mikrotik Ceritified Consultant & Trainer (MTCNA, MTCRE, MTCINE, MTCWE, MTCTCE, MTCipv6e). My daily activities are managing mikrotik/ubiquity/linux/PHP/python/scriptcase outsourced services, teaching IT and Telecommunications, and i am looking for a new opportunity related to linux, solaris, mikrotik. I also developed a web-based application for serious application, using PHP-mysql/postgresql.