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Hi, I am a dedicated Full-Stack Developer with strong expertise in building scalable, high-performance web applications. My technical foundation spans both frontend and backend development, with hands-on experience in modern frameworks and robust database systems. - Backend Expertise: Skilled in Laravel and Node.js/Express, delivering secure, maintainable, and efficient server-side solutions. - Frontend Mastery: Proficient in React, Next.js, and Vue.js, crafting responsive, user-friendly interfaces with a focus on performance and accessibility. - Database Management: Experienced in MySQL and PostgreSQL, designing optimized schemas and queries for complex applications. - API Development: Strong background in RESTful API design and integration, ensuring seamless communication between systems and services. - Deployment & Scalability: Familiar with CI/CD pipelines, cloud deployment, and best practices for scalable system design. Beyond technical skills, I bring a methodical problem-solving approach, translating complex requirements into clear, actionable solutions. I thrive in collaborative environments but am equally effective working independently, consistently delivering projects that balance technical depth with business impact.

Need a reliable developer to build, improve, or maintain your web or mobile application? I’m a Full-Stack Web & Mobile Developer with 20+ years of experience in web development and 10+ years in mobile development. I help businesses turn ideas and existing systems into reliable, production-ready applications. I can help you with: • Web application development • Mobile app development for iOS & Android • Laravel backend and REST API development • Flutter mobile applications • Next.js / modern frontend development • WordPress websites and customization • Admin dashboards and business management systems • Existing application maintenance and bug fixing • API and third-party service integrations • Database design and optimization • Deployment, server configuration, and production troubleshooting TECHNOLOGIES I WORK WITH Backend: Laravel, PHP, CodeIgniter, REST API, MySQL, MariaDB, PostgreSQL, Redis Frontend: Next.js, React, Inertia.js, JavaScript, Tailwind CSS, Bootstrap Mobile: Flutter, Android, iOS, Firebase, Push Notifications CMS: WordPress, WooCommerce Infrastructure & Tools: Linux, Ubuntu, Apache, Nginx, Git, GitHub, Firebase, Sentry WHAT I CAN BUILD I’ve worked on projects including: • CRM and sales applications • Visitor management systems • Queue management systems • Loyalty and membership applications • E-commerce platforms • Business administration systems • Reporting dashboards • Field sales and visit-tracking applications • QR code and location-based applications • Company websites • Mobile apps connected to existing websites or APIs I can work on a project from planning and database design through development, testing, deployment, and ongoing maintenance. I also regularly work with existing and legacy applications. If you have an application that is unstable, outdated, difficult to maintain, or needs new features, I can analyze the existing system and help improve it without unnecessarily rebuilding everything. WHY CLIENTS WORK WITH ME - Experienced in both web and mobile development - Comfortable working with existing codebases - Clear and practical communication - Strong troubleshooting and problem-solving skills - Production deployment experience - Long-term support available - Focused on building maintainable solutions, not just delivering code Whether you need a complete application, a mobile app connected to your existing system, a Laravel API, WordPress customization, or help fixing an existing application, feel free to send me your requirements. I’ll be happy to review your project and recommend a practical technical approach.

𝗙𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗶𝗻𝗴 𝗶𝗻 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘄𝗲𝗯 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗯𝘂𝗶𝗹𝘁 𝘄𝗶𝘁𝗵 𝗟𝗮𝗿𝗮𝘃𝗲𝗹, 𝗡𝗲𝘅𝘁.𝗷𝘀, 𝗮𝗻𝗱 𝗔𝗣𝗜-𝗱𝗿𝗶𝘃𝗲𝗻 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲𝘀. I work with founders and development teams to build new products from scratch and extend existing systems, delivering clean, maintainable code that's safe to grow long-term. 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 ✔ Laravel - REST APIs, Service Pattern, Sanctum, Queue Workers, Webhook handling ✔ Next.js - App Router, Server & Client Components, SSR/SPA ✔ Symfony - modular backend architecture, Doctrine ORM, SSO/ADFS, Redis ✔ Full-stack integration - third-party APIs, OAuth2, webhooks, token-based auth ✔ Payment systems - Stripe subscriptions & webhook processing, Midtrans ✔ Database & backend - PostgreSQL, Supabase (Auth, RLS), MySQL, Docker, AWS ✔ AI feature integration - OpenAI API, Whisper, GPT-4o, Claude API 𝗪𝗵𝗮𝘁 𝗜'𝘃𝗲 𝗕𝘂𝗶𝗹𝘁 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝗰𝗼𝘂𝗿𝘀𝗲 & 𝗯𝗶𝗱𝗱𝗶𝗻𝗴 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 (Symfony 6.x + ReactJS) - modularized backend for a global business school platform, integrated with PeopleSoft, Canvas LMS, and MuleSoft. Deployed on AWS (Elastic Beanstalk, RDS). 1000+ hours, ongoing. 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗮𝗹 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺 (𝗦𝗖𝗔𝗗𝗔) (Laravel 10 + Next.js) - full-stack smart factory automation platform, Dockerized with Nginx and Supervisor. Component management UI and automated report generation delivered on a milestone basis. 𝗘𝗰𝗵𝗼𝗣𝗼𝘀𝘁 𝗔𝗜: 𝗩𝗼𝗶𝗰𝗲-𝘁𝗼-𝗖𝗼𝗻𝘁𝗲𝗻𝘁 𝗦𝗮𝗮𝗦 (Next.js 15 + OpenAI Whisper + GPT-4o + Stripe + Supabase) - turns voice recordings into multi-platform marketing content with real-time AI streaming and subscription billing. 𝗟𝘂𝗻𝗮𝗿𝗶𝘀: 𝗖𝗹𝗶𝗻𝗶𝗰 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 (Laravel 11 + Next.js 14) - multi-role system (Admin, Doctor, Staff), automated reminders, analytics dashboard, Midtrans payment integration. Clean architecture with standardized API design. 𝗗𝗼𝘁𝗹𝘆: 𝗨𝗥𝗟 𝗦𝗵𝗼𝗿𝘁𝗲𝗻𝗲𝗿 𝗦𝗮𝗮𝗦 (Next.js + Payload CMS + Stripe) - freemium model with ad-monetized redirects, custom slugs, and click analytics. 𝗪𝗵𝗮𝘁𝘀𝗔𝗽𝗽 𝗖𝗵𝗮𝘁𝗯𝗼𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 (Laravel + WhatsApp API + Airtable) - automated chatbot for business workflow automation. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 I focus on clean architecture and production-ready code that performs well at scale. Whether you need a new web application built or an existing system extended and stabilized, I communicate clearly, meet deadlines, and take full ownership from architecture to deployment. Available for project-based and long-term engagements

Need a reliable developer to build or scale your web app or backend system? I help startups and businesses launch SaaS platforms, APIs, and dashboards using Laravel for rapid full-stack development and Golang for high-performance backends. With 7+ years in Laravel/PHP and 3+ years in Golang & React, I deliver clean architecture, scalable systems, and on-time results — no excuses, just outcomes Why Clients Hire Me - Laravel Expertise – built SaaS apps, ERPs, and custom CMS platforms with modern Laravel stacks - Golang Backends – developed services & APIs designed for concurrency, performance, and scale. - React Frontends – crafted dashboards and user interfaces with React, TailwindCSS, and Next.js. - Proven Results – 100% Job Success on Upwork, $3K+ earned, and a track record of delivering projects that work the first time. Selected Results - Optimized pharmacy routing system — improved product availability logic by 50%, ensuring customers were matched with the right pharmacy faster. - Developed payroll & HR system — automated attendance tracking, meal allowance calculation, and payroll reporting, saving the company hours of manual work weekly. - Built inventory management platform — enabled real-time tracking of stock movement, reducing inventory errors and improving supply chain visibility. - Launched multiple e-commerce stores — helped businesses boost sales and expand online presence with custom, scalable solutions. - Created company profile websites — designed professional websites to strengthen brand credibility and attract new clients. - Contributed to fashion social media platform — implemented features that enhanced user engagement and content sharing. - Engineered billing engine for telecom industry — streamlined complex billing workflows and ensured accuracy in high-volume transactions. - Enhanced LMS (Learning Management System) — built key features to improve course management and student engagement. - Maintained and scaled dog-walking app — developed real-time GPS tracking with WebSockets for live pet-walking updates. Core Skills & Tools Backend Development - Laravel (7+ years), PHP, REST APIs, OAuth/JWT - Golang (concurrency, microservices, backend services) - Node.js / Express.js (select projects) Frontend Development - React.js (4 years), Next.js, TailwindCSS, Bootstrap - HTML5, CSS3, JSON, AJAX Databases & Cloud - MySQL, PostgreSQL, MariaDB, MongoDB - Redis, Firebase (basic) DevOps & Tools - Docker, PM2, Supervisor - GitHub, GitLab, Bitbucket - CI/CD pipelines What I Deliver - Full-Stack Web Applications (Laravel + React) - Backend APIs (Laravel or Golang) - SaaS MVPs & Custom Dashboards - Legacy Code Refactoring & Optimization - API Development & Third-Party Integrations - Scalable, Maintainable Architectures Why Work With Me - Strong foundation in both Laravel & Golang - Focus on clean, maintainable code - Reliable, deadline-focused, and transparent communication - Can work independently or as part of a team Let’s Build Together Whether you’re starting from scratch or scaling an existing system, I’ll help you deliver a solution that’s clean, scalable, and built to last.

I help founders and teams get unstuck when a Laravel, React, or Next.js product needs to move forward without breaking what already works, whether that's stabilizing an existing SaaS, building out a marketplace, adding an AI layer to a product that already has users, or picking up a codebase someone else left behind. Top Rated on Upwork, 100% Job Success, $30k+ earned. Where I fit best: ✔ Laravel backend development, API integration, and database design ✔ Stabilizing, auditing, and extending existing SaaS platforms ✔ Two-sided marketplaces: listings, lead management, and payment gateway integration ✔ AI chatbot and OpenAI API integration inside existing products ✔ React / Next.js dashboards, admin panels, and internal tools ✔ Bug fixing, performance work, and ongoing maintenance ✔ Full-stack builds when the project needs both ends done right I'm comfortable working alongside AI-assisted workflows (Claude Code, Cursor). I use them to move faster, but I still read and understand every line that goes into your project before it ships. What clients say: "Kezia produces very high quality work and is committed to successful outcomes." — client review, SaaS code review project "Kezia is genuinely impressive... on time, reliable, very proactive, and goes above and beyond the brief." — client review, ongoing project I ask questions to clarify tasks and scopes, and I give daily progress updates so you're never wondering where things stand. If something outside scope needs fixing, I flag it and ask before touching it, not after. If you have a Laravel, React, or Next.js project that needs a steady hand, whether it's an existing SaaS, a marketplace build, or an AI feature you want done properly, send me the details and I'll tell you honestly how I'd approach it.

My Name is Didin I specialize in fixing and refactoring messy or poorly designed Laravel systems, especially APIs that are already running in production and cannot afford to break. I also capable to build frontend work using Vue, or React. I can deploy PHP/ Laravel project to self-hosted, AWS, DigitalOcean, VPS, or even shared hosting. I love using TDD integrated with Continues Integration such: Travis or bitbucket pipelines. And comfortable using git versioning control systems such: GitHub, GitLab, or bitbucket. Many of my clients come to me after working with previous developers where the system becomes difficult to maintain, unstable, or risky to update. My role is to take over those situations and turn them into stable, scalable, and maintainable systems without disrupting existing functionality. Over the years, I’ve handled real-world backend challenges such as POS systems, API integrations (including third-party platforms), order synchronization, and high-traffic applications. I don’t just write code, I make sure your system can safely evolve. # WHAT I CAN HELP YOU WITH: ✔ Fixing broken or unstable Laravel applications ✔ Refactoring messy or unstructured codebases ✔ Improving API design and maintainability ✔ Ensuring backward compatibility (no breaking changes) ✔ Debugging complex issues in legacy systems ✔ Optimizing performance and database queries ✔ API integrations (payment gateways, POS, third-party platforms) ✔ System architecture improvements for scalability # HOW I WORK I usually start with a quick system audit to understand the root cause of the problem and identify risks before making changes. From there, I provide a clear and safe plan to fix or refactor your system — ensuring improvements are made without breaking what already works. I focus on: ✔ Clean and maintainable code ✔ Safe deployment ✔ Long-term scalability # WHY CLIENTS WORK WITH ME ✔ 14,000+ hours on Upwork ✔ Proven experience handling real production systems ✔ Strong focus on stability and backward compatibility ✔ Clear communication and structured approach ✔ Able to work with existing/legacy code (not just new builds) # SKILLS ✔ PHP 5, PHP 7.x, PHP 8.x ✔ Python, Flask # Framework ✔ Laravel 5.x - 12.x ✔ Yii 1 & Yii 2 ✔ Codeigniter ✔ CraftCMS ✔ Inertia (React, or Vue are welcome) ✔ Livewire ✔ Lumen ✔ Sanctum ✔ OAuth (Passport) ✔ Cashier ✔ Nova ✔ Filament # API Integration ✔ RESTfull API ✔ Stripe (Mollie) ✔ Thuisbezorgd API ✔ UberEats API ✔ Google Map API ✔ Webhook ✔ FacebookAPI ✔ WhatsApp Integration ✔ Telegram Integration ✔ Planday Integration ✔ Telegram Bot # Database ✔ Mysql /MariaDB ✔ PostgreSQL ✔ Sqlite ✔ MongoDB ✔ Redis ✔ Casandra # Testing ✔ PEST ✔ PHPUnit ✔ Selenium # AI Tools to boost productivity ✔ Claude AI ✔ Cursor ✔ Copilot ✔ ChatGPT # Cloud Server ✔ AWS (EC2) ✔ Plesk ✔ DigitalOcean ✔ BlueHost # Server ✔ Apache ✔ Nginx # JavaScript ✔ Vanilla JS ✔ jQuery ✔ Angular ✔ Vue: Vuex, Vuetify ✔ React: React-Redux, Redux-Thunk, Redux-Saga ✔ NextJS | NestJS | NuxtJs ✔ Webpack ✔ AlpineJS ✔ TypeScript # Other ✔ HTML5 ✔ CSS/ CSS3 ✔ LESS, SAAS, BEM ✔ Memcached ✔ Chrome Extension ✔ GIT or Subversion # API Docs ✔ Swagger (zircote) ✔ Blueprint API