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Hi, I'm Opi, a Top-Rated Full Stack Developer with 6+ years of experience building custom web applications, SaaS platforms, AI-powered software, enterprise systems, and production-ready MVPs for startups, SMEs, and growing businesses. I help founders and companies transform ideas into secure, scalable, and maintainable software. Whether you need a new SaaS platform, an AI-powered application, an enterprise business system, or a custom web application, I can take your project from planning and architecture to deployment and long-term support. Services - Full Stack Development - Custom Software Development - Web Application Development - SaaS Application & MVP Development - AI Application Development - Enterprise Software Development - CRM, ERP, HRM & POS Systems - Warehouse Management Systems (WMS) - Admin Dashboards & Customer Portals - REST API Development & Third-Party Integrations - Payment Gateway Integration - Cloud Deployment & DevOps Tech Stack Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS Backend: Node.js, Express.js, NestJS, Laravel, PHP, Python, FastAPI Database & Cloud: PostgreSQL, MySQL, MongoDB, Supabase, AWS, Docker, DigitalOcean, GitHub Actions (CI/CD) Why Work With Me - Top-Rated Freelancer on Upwork - 100% Job Success Score - 50+ Custom Software Products Delivered - Experience building AI, SaaS, ERP, CRM, WMS, HRM, and enterprise platforms - Clean, scalable, and maintainable code - Secure authentication, role-based access, and API-first architecture - Fast communication and transparent project management - 6 Months Free Maintenance After Delivery Whether you're looking for a Full Stack Developer, Web Application Developer, AI Developer, SaaS Developer, Enterprise Software Developer, or a Custom Software Engineer, I'm ready to help build software that's reliable, scalable, and designed for long-term success. Let's build something great together. Keywords: Full-Stack Developer, Full Stack Software Engineer, Custom Software Developer, Web Application Developer, SaaS Developer, SaaS MVP Developer, AI Developer, AI Engineer, AI SaaS Developer, Enterprise Software Developer, OpenAI API, ChatGPT Developer, GPT-4o, Claude AI, Gemini AI, AI Agent Developer, LLM Developer, RAG, LangChain, LangGraph, MCP, Vector Database, AI Automation, AI Integration, Prompt Engineering, React.js, Next.js, TypeScript, JavaScript, Tailwind CSS, Material UI, Bootstrap, React Native, Flutter, Node.js, NestJS, Laravel, PHP, Python, FastAPI, REST API, API Integration, PostgreSQL, MySQL, MongoDB, Supabase, AWS, Docker, DevOps, CRM Development, ERP Development, HRM Development, POS Development, Warehouse Management System (WMS), Inventory Management System, Marketplace Development, Multi-Tenant SaaS, Subscription Platform, Payment Gateway Integration, Admin Dashboard, Customer Portal, n8n, Zapier, Microsoft Power Automate, Healthcare, Telemedicine, Fintech, Logistics, Supply Chain, Education, LMS, Video Streaming, E-commerce.

I help businesses design, build, and deploy reliable digital solutions across Odoo ERP, React frontend development, WordPress, and UI/UX design. With 6+ years of experience, I focus on practical systems that streamline operations, enhance the user experience, and support long‑term business growth. From ERP implementation and custom module development to responsive web applications, website deployment, and server optimization, I deliver solutions that are scalable, maintainable, and aligned with real business needs. ✨ 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 — 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐖𝐢𝐭𝐡 𝐎𝐝𝐨𝐨 𝐄𝐑𝐏 & 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 🔹 ERP Customization, Module Development & API Integration 🔹 Workflow Automation, POS, Inventory & Accounting Solutions 🔹 Deployment, Configuration & System Maintenance 𝐖𝐞𝐛 & 𝐅𝐮𝐥𝐥‑𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 🔹 React Frontend & Responsive Web Applications 🔹 Django/Python Full‑Stack Solutions & REST API Development 🔹 Business Applications & Figma‑to‑Frontend Implementation 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 & 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 🔹 WordPress Design, Development & Customization 🔹 WooCommerce Integration & Business Websites 🔹 Responsive, SEO‑Friendly Sites & Production Deployment 𝐔𝐈/𝐔𝐗 𝐃𝐞𝐬𝐢𝐠𝐧 🔹 Figma Wireframes, Prototypes & Interface Design 🔹 Responsive UI, Design Systems & Design‑to‑Frontend Implementation 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 & 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 🔹 Linux Server Setup, Nginx, SSL & PostgreSQL 🔹 VPS Deployment, Performance Optimization & Security Hardening I believe great software is more than clean code — it’s about understanding business goals and translating them into reliable, scalable systems. Whether you need to customize an existing Odoo ERP, build a React application, launch a WordPress site, or deploy a production-ready solution, I focus on delivering efficient, long-term results that help your business grow.

"I would like to introduce myself as an ERP solution specialist, Accounting Freelancer. I'm a Sage300, ODOO, QuickBooks and Xero Advisor and have more than 16 years of professional experience in ERP solution implementation. My experiences range from day to day business solution and support , account reconciliations, fixed assets, general ledger, accounts payable, accounts receivable, bank reconciliation, budgets/forecasts as well as Financial Reports (P&L and Balance Sheet). I also have experience with Excel for data analysis, financial reporting for management, Financial dashboard and power quarry. My passion is to help my clients solve financial issues and deliver the best quality of work as they require. I can help you with: - Setting up your company in a new ERP SYSTEM with Sage300,Quickbook, Odoo, and Xero accounting software - Monthly bookkeeping requirements - Reconciliations (bank, credit card, merchant accounts, etc.) - Inventory tracking - Payroll run and payroll posting in Norming Payroll, QuickBooks and Xero - Accounts Receivable - Accounts Payable - Financial Reporting - Financial Analysis - SQL queries - Power BI I look forward to a long-term relationship with my clients. Hope to hear from you soon!

am a dedicated Full-Stack Developer and ERPNext/Frappe Specialist with proven experience in building scalable, efficient, and customized software solutions. Over the years, I’ve helped startups, SMEs, and enterprises streamline their operations through ERPNext implementations, custom app development, and API integrations. My Expertise Includes: ERPNext & Frappe – Customization, module development, API integration, version upgrades, and deployment Backend Development – Python, Django, Flask, REST APIs, GraphQL, database design (MySQL, PostgreSQL, MariaDB) Frontend Development – React.js, React Native (Expo), JavaScript/TypeScript, TailwindCSS, Bootstrap Automation & Integrations – QuickBooks, Shopify, Amazon Seller Central, Payment Gateways, Shipping APIs DevOps – Docker, Kubernetes, CI/CD pipelines, server deployment & optimization What I Deliver: Reliable ERPNext customization and implementation Full-stack web and mobile applications Scalable architectures with clean, maintainable code Strong communication, timely updates, and long-term support If you’re looking for a developer who can own your project end-to-end, from backend logic to frontend experience — let’s connect and build something impactful together.

Hi, I am a Professional Web Application Developer. My skill in programming languages ​​is PHP, MySQL, HTML, CSS, JavaScript, JQuery, Bootstrap, Laravel, VueJS, and others (WordPress) I have created some website based on E-commerce, School & College Management, Blog, News Porter, etc. I can solve your problems by doing my job. You can let me know your needs I will try hard enough to satisfy you. Thank you for visiting my profile. Saiful Kazy Web Application Developer

Senior Engineer with 17+ Years of Experience | Laravel · Vue · React · Next.js · Supabase · Inertia · Mysql · PostGreSQL | SaaS, Multi-tenant, AI & IoT Platforms I've been building web software since before "full-stack" was a job title. Seventeen years later, I'm leading senior engineering teams and guiding startups as a fractional CTO. If you are an early stage startup or a solo founder or an Enterprise, this is how I can help you: ➡️ Building your SaaS & Web Apps — Laravel, Vue.js, React, Next.js, Node.js, REST APIs, PostgreSQL/MySQL ➡️ E-Commerce & Marketplaces — Multi-vendor platforms, custom storefronts, Stripe/PayPal integrations ➡️ Legacy Rescue — Taking over broken Laravel/Vue codebases and making them something you're not embarrassed to show people ➡️ AI & Automation — LLM integrations, GPT-based features, workflow automation ➡️ IoT Platforms — Device networks, real-time pipelines, operational dashboards Some work I'm proud of: - I architected the Indiana First Steps platform for the US government — a HIPAA-compliant early intervention system with multi-agency data sharing and eligibility logic that had to be right, because the people depending on it couldn't afford for it not to be. - I was a Technical CEO for a US utility SaaS company, where I designed the backend infrastructure managing 10,000+ households daily. IoT device networks, real-time data processing, the works. That one taught me a lot about what "scale" actually means versus what people say it means in job posts. - I led frontend architecture for Rebel Walls, a global e-commerce brand that needed cinematic performance across markets. High-traffic, high-stakes, zero tolerance for slow. How I work: I've held CTO, Product Lead, and Scrum Master roles — so I've sat on both sides of the founder-engineer tension enough times to know where it usually goes wrong. My job is to close that gap: give you an honest read on what's feasible, tell you when a scope is going to bite you later, and ship code that the next developer won't curse me for. I also run Kinetik Dynamics, which means if your project suddenly needs to move fast, I have senior engineers I trust who work under my direct oversight. Not outsourced. Not farmed out. I'm still the one responsible. Stack I work in regularly: Laravel · Vue.js · React · Next.js · Python · TypeScript · Tailwind · PostgreSQL · MySQL · Redis · AWS · Docker · REST & GraphQL · Stripe · OpenAI API · Gemini API · Claude API · Supabase If the project matters to you, send me the details. I believe, I can help you out greatly.