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Custom CRM and business software for trade contractors, plus API integration that wires it to the tools you already pay for. One web application you own instead of the 5+ SaaS subscriptions you're renting. Solar, HVAC, plumbing, roofing, electrical. Lead to dispatch to contract to invoice in one place. 25+ production applications delivered, and a Job Success Score that read 100% for as long as it was displayed. 𝗪𝗛𝗘𝗥𝗘 𝗧𝗛𝗘 𝗝𝗢𝗕 𝗚𝗘𝗧𝗦 𝗦𝗧𝗨𝗖𝗞 ServiceTitan for dispatch. Jobber for scheduling. QuickBooks for invoicing. DocuSign for contracts. CompanyCam for photos. None of them were built to talk to each other, so you become the integration layer. You retype the same job into 3 systems by hand, and the bill climbs every time you add a crew member. 🏆 "It was great working with Altafur. A skilled developer who wants to make sure he understands exactly what you want." - A TikTok and YouTube Shorts import script. 4.9 stars, endorsed Collaborative and Clear Communicator. 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 𝗙𝗢𝗥 𝗖𝗢𝗡𝗧𝗥𝗔𝗖𝗧𝗢𝗥𝗦 ✔️ A Custom CRM You Own Outright Leads, scheduling, quoting, contracts, invoicing, and payments in one web application, multi tenant from day one. No per seat fees. ✔️ One Dashboard Over the Tools You Already Pay For Jobber, ServiceTitan, HouseCall Pro, ServiceFusion, QuickBooks, DocuSign, ShipStation, and CompanyCam wired together through their APIs. ✔️ AI Agents and Automation That Do Real Work LangChain and the OpenAI API for support automation, plus a 5 star build that put an AI assistant on a client's Facebook and Instagram. ✔️ Field Tools That Work Where the Crew Stands Time tracking with optional GPS against project budgets, photo capture, and e-signature on a phone. ✔️ Purchasing and Vendor Money Purchase orders with partial receiving, matched against vendor invoices. Job cost stops being a guess you settle at the end of the month. 𝗪𝗛𝗔𝗧 𝗜𝗧'𝗦 𝗕𝗨𝗜𝗟𝗧 𝗢𝗡 → Backend: PHP, Laravel, Python, Django, Node.js, MySQL, PostgreSQL, REST APIs, webhooks, OAuth → Frontend: JavaScript, TypeScript, React, Next.js, Tailwind, HTML5, CSS → Cloud and AI: AWS, Supabase, Firebase, Algolia, OpenAI API, LangChain, AI agents, chatbots → Money and documents: Stripe, PayPal, QuickBooks, DocuSign, Dropbox Sign 𝗧𝗛𝗘 𝗙𝗨𝗟𝗟 𝗕𝗨𝗜𝗟𝗗: 𝗛𝗨𝗗𝗦𝗢𝗡𝗪𝗢𝗥𝗞𝗦 🏆 A Multi Tenant Field Service Platform, Live and Billing Runs a contractor's whole job lifecycle: lead intake, design review, contract, permitting, PTO. Each trade gets its own pipeline, so a solar install and an HVAC service call move on their own rules inside one system. → Proposal to contract to invoice in one click, with e-signature through Dropbox Sign: the contractor signs first and it forwards to the customer automatically. → Per tenant scoping on every module, Company ID plus Google SSO sign in, tenant scoped search on Algolia, and contract and photo storage on AWS S3. → Result: a live product billing flat 800 and 1,600 USD monthly plans with no per seat fees. Also on Laravel: Loopy Loyalty, stamp cards for Apple and Google Wallet. CRATEWORKS, a fine art delivery portal. 𝗪𝗛𝗬 𝗖𝗢𝗡𝗧𝗥𝗔𝗖𝗧𝗢𝗥𝗦 𝗞𝗘𝗘𝗣 𝗠𝗘 🎯 Someone who keeps asking until the requirement is clear. It's what clients repeat in reviews, and it's cheaper than building the wrong module twice. ⚡ Backend, frontend, and the API work between them, from one person. Nothing falls between 2 contractors. 💡 A summer inside the OWASP Foundation through Google Summer of Code 2024, where secure defaults were the deliverable. Security isn't a phase at the end here. 𝗪𝗛𝗔𝗧'𝗦 𝗬𝗢𝗨𝗥𝗦 𝗪𝗛𝗘𝗡 𝗜𝗧'𝗦 𝗗𝗢𝗡𝗘 ✅ The code and the database in your repo, under your accounts. No per seat billing on a system you paid to build. ✅ A live platform I built that you can click through before you commit a dollar. Ask and I'll send it. ✅ 30+ hours a week, open to contract to hire, and an average first reply under 4 hours. 𝗪𝗛𝗢 𝗜 𝗕𝗨𝗜𝗟𝗗 𝗧𝗛𝗜𝗦 𝗙𝗢𝗥: Solar • HVAC • Plumbing • Electrical • Roofing • General Contracting • Field Service SaaS 𝗣𝗜𝗖𝗞 𝗢𝗡𝗘 𝗝𝗢𝗕 𝗔𝗡𝗗 𝗪𝗔𝗟𝗞 𝗠𝗘 𝗧𝗛𝗥𝗢𝗨𝗚𝗛 𝗜𝗧 Tell me the tools you're paying for and one job you'd like to follow from lead to invoice. You'll get back where that job breaks, what the retyping costs you every month, and whether wiring up what you own beats building new.

9 Years Experience · 750+ Real Projects Completed Across Global Markets · 100% Job Success ⭐ I build Shopify stores, Laravel SaaS platforms, AI-powered web apps, and Webflow sites for businesses across USA, Australia, UK, Netherlands, and Germany, production-ready, fast, and built to convert. ━━━━━━━━━━━━━━━ 🤖 AI Integration & Automation ━━━━━━━━━━━━━━━ ✅ ChatGPT / OpenAI API integration ✅ Claude API (Anthropic) integration ✅ AI Chatbot development (website, WhatsApp, Telegram) ✅ Bilingual chatbot flows (English + any language) ✅ WhatsApp Business API + Twilio integration ✅ AI-powered automation workflows ✅ Document processing & data extraction with AI ✅ Google Sheets + AI lead capture automation ✅ AI product recommendations for Shopify ✅ LLM integration into existing platforms ━━━━━━━━━━━━━━━ 🛒 Shopify Development ━━━━━━━━━━━━━━━ ✅ Custom Shopify Themes (Liquid) ✅ Shopify Plus development ✅ App integration & custom features ✅ TikTok Shop & social commerce integration ✅ Landing pages & store optimization ✅ Performance & conversion improvements ✅ Figma → Shopify pixel-perfect builds ✅ Bug fixing & troubleshooting ━━━━━━━━━━━━━━━━ ⚙️ Laravel SaaS & Web Applications ━━━━━━━━━━━━━━━━ ✅ Custom Laravel SaaS platforms ✅ REST API development & integration ✅ Admin Dashboards & custom CMS ✅ Payment gateway integration ✅ Multi-tenant SaaS architecture ✅ AI-powered Laravel applications ✅ Database design & optimization ━━━━━━━━━━━━━━━━━ 🌐 WordPress Development ━━━━━━━━━━━━━━━━━ ✅ WordPress customization & theme development ✅ Elementor / Bricks / Gutenberg builds ✅ WooCommerce setup & customization ✅ Speed optimization & SEO-friendly structure ✅ Custom plugin development ✅ Figma → WordPress pixel-perfect conversion ✅ Bug fixing & maintenance ━━━━━━━━━━━━━━━━━ 🎨 Webflow Development ━━━━━━━━━━━━━━━━━ ✅ Custom Webflow builds & CMS ✅ Figma → Webflow conversion ✅ Responsive & animation-rich designs ✅ Webflow + Laravel backend integration ━━━━━━━━━━━━━━━━━ 🖼️ Figma to Website ━━━━━━━━━━━━━━━━━ ✅ Figma → WordPress (Elementor / ACF / Custom) ✅ Figma → Shopify ✅ Figma → Webflow ✅ Figma → Laravel / Custom HTML ✅ Pixel-perfect responsive conversion ✅ Clean code & fast loading ━━━━━━━━━━━━━━━━━ ⭐ Why Clients Choose Me ━━━━━━━━━━━━━━━━━ ✅ 750+ projects delivered across 10+ countries ✅ 100% Job Success Score on Upwork ✅ 9 years of hands-on experience ✅ All code written manually — no AI-generated code ✅ Mobile-first, conversion-focused development ✅ Fast turnaround & clear communication ✅ NDA-ready for agency & white-label projects ✅ Clients in USA, Australia, UK, Netherlands, Germany, France, Singapore & more Whether you need an AI chatbot, a Shopify store, a Laravel SaaS MVP, or a pixel-perfect website. I deliver reliable, modern solutions that help your business grow. Let's discuss your project today.

$1M+ earned, 17,000+ hours, 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 (top 3% on Upwork). I'm a full-stack engineer and software architect with 𝟏𝟗 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞. I build AI products, HealthTech platforms, real-time video systems, and SaaS, plus the cloud infrastructure that keeps them fast under real load. • 100% Job Success, 95 jobs completed • Top Rated Plus: top 3% of Upwork talent • 17,000+ hours worked, $1M+ earned • Excellent communication, verified by Upwork 𝐀𝐈 & 𝐋𝐋𝐌 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 Production LLM apps: chat assistants, RAG pipelines, and AI agents built on OpenAI and Claude (Anthropic) APIs. Shipped work includes AI Mate and Genius (AI assistants) and TissueConnect.ai, an Azure-based medical imaging AI platform. 𝐇𝐞𝐚𝐥𝐭𝐡𝐓𝐞𝐜𝐡, 𝐅𝐇𝐈𝐑 & 𝐇𝐈𝐏𝐀𝐀 I implement HL7 FHIR for interoperable exchange of patient and clinical data with EHR systems, with HIPAA-compliant handling of protected health information end to end. On TissueConnect.ai I built FHIR integration into an Azure-based medical imaging AI platform. 𝐑𝐞𝐚𝐥-𝐓𝐢𝐦𝐞 𝐕𝐢𝐝𝐞𝐨 & 𝐖𝐞𝐛𝐑𝐓𝐂 Low-latency WebRTC is a core strength: telehealth consults, live classes, remote proctoring, and synchronized multi-party sessions. I built Daency, where every student in a class follows the same video in real time with their trainer. 𝐂𝐥𝐨𝐮𝐝, 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐋𝐨𝐚𝐝 𝐁𝐚𝐥𝐚𝐧𝐜𝐢𝐧𝐠 AWS (EC2, S3, Lambda, VPC, Route53, CloudFront, ALB/NLB), Azure, Google Cloud, DigitalOcean. Load balancing, auto-scaling, NGINX, Docker, CI/CD (GitHub Actions, Jenkins). I've run infrastructure for an SMS platform handling millions of texts a month, and high-stakes online exams that cannot go down. 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 & 𝐌𝐨𝐛𝐢𝐥𝐞 TypeScript, React, Next.js, Vue, Node.js. REST and GraphQL APIs backed by MongoDB, PostgreSQL, MySQL, and Redis. Mobile and desktop with Flutter, React Native, and Electron. 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐚𝐭 𝐒𝐜𝐚𝐥𝐞 Software architect for TestReach since 2014, an online assessment and remote proctoring platform used by leading certification bodies. Co-founder of NerdDevs (20+ engineers), so when your project needs more than one pair of hands, I can bring a vetted team. 𝐇𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤 • I don't just write code. 𝐼 𝑠𝑜𝑙𝑣𝑒 𝑏𝑢𝑠𝑖𝑛𝑒𝑠𝑠 𝑝𝑟𝑜𝑏𝑙𝑒𝑚𝑠. • TDD and proven design patterns: reliable, maintainable, scalable. • Honest, clear communication. You'll always know where things stand. 𝐀 𝐠𝐨𝐨𝐝 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮'𝐫𝐞... An ambitious startup, a healthcare or EdTech company, or a business owner who needs a senior engineer to build an AI product, ship a compliant health platform, scale real-time video, or untangle infrastructure. 𝑇𝑒𝑙𝑙 𝑚𝑒 𝑤ℎ𝑎𝑡 𝑦𝑜𝑢'𝑟𝑒 𝑏𝑢𝑖𝑙𝑑𝑖𝑛𝑔 𝑎𝑛𝑑 𝑤ℎ𝑒𝑟𝑒 𝑖𝑡 ℎ𝑢𝑟𝑡𝑠, 𝑎𝑛𝑑 𝐼'𝑙𝑙 𝑡𝑒𝑙𝑙 𝑦𝑜𝑢 𝑒𝑥𝑎𝑐𝑡𝑙𝑦 ℎ𝑜𝑤 𝐼'𝑑 𝑎𝑝𝑝𝑟𝑜𝑎𝑐ℎ 𝑖𝑡.

I specialize in integrating AI into real, working systems, whether it’s adding a chatbot on top of your data, building a Retrieval-Augmented Generation (RAG) pipeline, or automating workflows using LLMs. What I typically build: ✅ RAG-based chat systems (connect your docs, database, or APIs) ✅ AI assistants inside SaaS products ✅ Smart search (semantic / vector-based) ✅ Workflow automation using AI ✅ API integrations with LLM providers I don’t just plug in an API and call it done. I look at your current system, identify where AI actually adds value, and integrate it in a way that fits your architecture. If you already have a product and want to add AI features the right way, I can help you plan, build, and ship it.

I build WordPress plugins that run on 800,000+ active sites, and AI features that actually ship to production. For 10 years I have been the developer companies bring in when the plugin is broken, the WooCommerce store will not scale, or the AI feature needs to work on real data instead of a demo. At StellarWP I was the #1 contributor to Event Tickets with 3,300+ commits, and shipped 5,000+ commits across The Events Calendar suite. Before that I was a core developer and team lead on Dokan Multivendor, WP User Frontend, and WP ERP at weDevs. WORDPRESS AND WOOCOMMERCE - Custom WordPress plugin development built to survive core updates - WooCommerce extensions, multivendor marketplaces, and checkout customization - Gutenberg block development matched to Figma designs, pixel perfect - WordPress REST API work and third party integrations - Stripe, PayPal, and payment gateway integration - Performance optimization: I cut load times 40% on a production suite using multi layer caching - Plugin conflict debugging, migrations, and rescuing broken sites - WCAG 2.1 AA accessibility: keyboard navigation, ARIA, focus management I am a contributor to WordPress Core and WooCommerce Core, so when something behaves strangely I usually know why. AI INTEGRATION AND LLM DEVELOPMENT - Claude and OpenAI API integration inside real products - RAG pipelines, embeddings, and retrieval - Structured prompt workflows and schema validated outputs - AI agents, automation, and internal tooling - Token cost control, caching, retries, and evaluation FULL STACK DEVELOPMENT - Next.js, React, TypeScript, Node.js, Supabase, Prisma, PostgreSQL, Redis, Vercel - Two production SaaS apps shipped solo end to end: JobLumy, an AI job tracking and resume scoring platform, and VibeMan.pro HOW I WORK I have worked US business hours from Dhaka for six straight years, so that is a proven habit rather than a promise. I reply within 0 to 2 hours. I will tell you when something is a bad idea before I build it. What clients have said: "He has an impressive capability to solve any WordPress or WooCommerce problem." "We had an error recurring with our WooCommerce shopping cart that many individuals failed to solve." "Rafsun is the freelancer you hope for." Send me what is broken or what you want built. If I am not the right fit I will tell you.

With over 14 years of experience, I specialize in transforming complex business requirements into scalable web applications that drive real revenue growth. My expertise spans full stack development, AI integration, and payment solutions, ensuring that every project I undertake is both innovative and robust. Core Expertise & Skills Backend Development 1. PHP: Developing robust applications since 2007 2. Laravel: Building enterprise-grade applications since 2012 3. Livewire: Real-time interfaces for modern web apps 5. API Development: RESTful services handling millions of requests 6. Database Design: MySQL optimization for high-traffic systems AI & Code Auditing 1. AI-driven code verification for enhanced accuracy 2. Comprehensive code reviews to ensure quality and security 3. Migrating legacy systems to AI-driven platforms for modern business needs Payment Solutions 1. Stripe / Stripe Connect: Certified expert with 50+ marketplace integrations since 2014 2. Payment Orchestration: Designing and implementing complex payment systems 3. E-commerce: Complete online store development and optimization Frontend & UI/UX 1. WordPress: Crafting dynamic websites since 2010 2. Modern CSS: Tailwind CSS, Bootstrap responsive design 3. Figma: Mastery in creating intuitive UI/UX designs 4. JavaScript: Dynamic interfaces and real-time functionality 6. Performance: Sub-3-second load times on complex applications MCP Experience 1. Figma, WordPress, Laravel: Mastery in creating and managing complex projects Additional Technologies 1. React.js, Python, Vue.js: Proficient in understanding and coding with AI assistance Data Analysis & Visualization 1. Analytical insights for data-driven decision making 3. Creating visualizations to simplify complex data sets Enterprise Integration 1. CRM Systems: Zoho CRM, custom business workflows 2. Marketing Automation: Email sequences, customer lifecycle management 3. Third-party APIs: Google services, social authentication, AI chatbots Cloud & DevOps 1. AWS & Digital Ocean: Scalable infrastructure deployment 2. Laravel Forge: Automated deployment and server management 3. Git/GitHub: Version control and collaborative development Professional Experience 1. Built 100+ web applications across various industries 3. Specialized in SaaS platforms and e-commerce solutions 4. Led development teams and mentored junior developers 4. Consulted for Fortune 500 companies and funded startups Key Achievements 1. Generated $50M+ in client revenue through platforms I've built 2. Maintained 99.99% uptime across all production applications 3. Improved client conversion rates by 30-50% consistently 4. Recognized by Stripe as integration methodology contributor 5. My Development Approach I focus on building solutions that scale with your business growth. Every project includes: 1. Future-proof architecture designed for expansion 2. Security best practices with PCI compliance when needed 3. Performance optimization for exceptional user experience 4. Comprehensive documentation for long-term maintainability Ideal Project Types 1. SaaS application development and migration 2. E-commerce platforms with complex requirements 3. Payment system integration and optimization 4. Custom web applications for growing businesses 5. API development and third-party integrations I work best with ambitious businesses ready to invest in quality solutions that drive measurable results. Ready to discuss your project? Let's build something exceptional together.