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I am a full stack web developer with hands-on experience building custom websites and web applications for businesses and startups. I specialize in creating modern, fast, and scalable solutions using technologies like JavaScript, React, Node.js, MongoDB, MySQL, PHP, Python, and Laravel. Every project is built from scratch based on your specific requirements. I have experience developing business websites, dashboards, booking systems, and custom web applications designed to solve real problems and support business growth. From frontend design to backend development and API integration, I provide complete full stack solutions with a strong focus on performance, clean code, and user experience. I communicate clearly with both technical and non-technical clients to ensure a smooth and transparent process. If you have an idea or need a reliable developer, feel free to reach out. I’d be happy to help bring your vision to life

Need a reliable developer who can transform your idea into a scalable, production-ready software product ? I help startups, entrepreneurs, and businesses build web applications, mobile apps, SaaS platforms, and enterprise solutions that solve real business problems and support long-term growth. I am the Founder of RazinSoft, a software development company with a team of 20+ developers. With 8+ years of experience, I have helped businesses launch and scale software products across multiple industries. From startup MVPs to enterprise-grade platforms, I focus on delivering solutions that are secure, scalable, and built for real-world use. Over the years, we have successfully delivered 100+ projects for clients worldwide and built 19+ commercial software products, including eCommerce platforms, ride-sharing systems, LMS solutions, ERP software, POS systems, delivery platforms, and AI-powered business applications. Services I Offer • Custom Web Application Development • Mobile App Development (Android & iOS) • SaaS Product Development • E-Commerce & Marketplace Solutions • ERP, CRM & POS Systems • Learning Management Systems (LMS) • Ride Sharing & On-Demand Platforms • Logistics & Delivery Management Systems • AI Integration & Business Automation • API Development & Third-Party Integrations Tech Stack • Backend: Laravel, PHP, Node.js • Frontend: Vue.js, React.js, Next.js • Mobile: Flutter • Database: MySQL, PostgreSQL, MongoDB • Cloud & DevOps: AWS, DigitalOcean, CI/CD • AI Integration: OpenAI, ChatGPT, Claude API Why Clients Choose Me: ✓ 8+ Years of Professional Experience ✓ 100+ Projects Delivered ✓ 500+ Clients Served Worldwide ✓ 100+ Commercial Products Built & Launched ✓ Team of 20+ Experienced Developers ✓ Proven Experience in SaaS, ERP, LMS, Marketplace & Enterprise Solutions ✓ Scalable, Secure & Maintainable Development Practices ✓ Clear Communication & Transparent Project Management ✓ Long-Term Support & Continuous Product Improvement Whether you need a startup MVP, a custom business platform, a mobile application, or a complete SaaS solution, I can help you plan, build, and launch your product successfully. Keywords Full Stack Developer, Full Stack Web Developer, MERN Stack Developer, React Developer, Next.js Developer, Node.js Developer, NestJS Developer, JavaScript Developer, TypeScript Developer, Front-End Developer, Back-End Developer, Web Application Developer, SaaS Developer, API Developer, MongoDB Developer, PostgreSQL Developer, MySQL Developer, Firebase Developer, Supabase Developer, Cloud Developer, AWS Developer, Azure Developer, GCP Developer, Docker Developer, Kubernetes Developer, CRM Developer, ERP Developer, eCommerce Developer, Custom Software Developer, Enterprise Application Developer. Send me a message with your project requirements, and I’ll provide a clear roadmap, timeline estimate, and the best technical approach for your business.

I help startups and businesses build scalable SaaS platforms, CRM systems, AI-powered applications, marketplaces, and educational platforms. Recent Project : SunPTE Happilion Monitorr Educas RyaanCMS With 20+ years of practical software development experience, I have delivered production-ready solutions used by thousands of users worldwide. I am a Senior Full-Stack Developer with over **20 years of practical experience** building web applications, SaaS platforms, AI-powered solutions, eCommerce marketplaces, educational systems, CRM/ERP platforms, customer portals, and enterprise business applications. I specialize in transforming ideas into scalable, secure, and production-ready applications. From database architecture and backend APIs to modern frontend experiences and cloud deployment, I manage the complete development lifecycle with a strong focus on performance, security, maintainability, and business outcomes. ### What I Can Help You Build ✅ Custom Web Applications ✅ SaaS Platforms ✅ AI-Powered Applications ✅ Educational & Learning Platforms (LMS) ✅ CRM & ERP Systems ✅ Customer & Employee Portals ✅ Marketplace & eCommerce Platforms ✅ REST APIs & Third-Party Integrations ✅ Payment Gateway Integrations ✅ Cloud-Based Applications ✅ Business Automation Systems ### Technical Expertise **Frontend** * React.js * Next.js * Vue.js * Angular * TypeScript * JavaScript * HTML5 * CSS3 * Tailwind CSS * Bootstrap **Backend** * PHP * Python * Node.js * Laravel * Django * ASP.NET Core (C#) * REST API Development * GraphQL **Database** * PostgreSQL * MySQL * MongoDB * SQL Server **Cloud & DevOps** * AWS * Docker * Cloudflare * Linux Servers * CI/CD * Git & GitHub ### AI Expertise I actively develop and integrate AI-powered solutions using: * Anthropic Claude * OpenAI ChatGPT * Codex * Google Gemini * AI Agents * RAG Systems * Workflow Automation * AI Chatbots * AI Learning & Assessment Systems ### Recent Projects * SunPTE – AI-powered PTE & IELTS platform * Happilion Bangladesh – Multi-vendor eCommerce marketplace * Monitor.net – Business platform * Educas – Educational platform * Happoilion – Business management platform ### Why Clients Work With Me ✔ 20+ Years Practical Experience ✔ Full-Stack Development Expertise ✔ AI Integration & Automation Experience ✔ Clean, Scalable, Maintainable Code ✔ Strong Communication & Project Ownership ✔ Performance & Security Focused ✔ Long-Term Support & Maintenance Whether you need a custom web application, AI-powered platform, SaaS product, marketplace, or enterprise solution, I can help bring your vision from concept to production. **Let's build something exceptional together.**

Hello! 🙋‍♂️ I am Mamun and I have been developing mobile apps and web app for over three years now. No matter how challenging the task presented may seem, I'll never classify it as impossible. With that said, if I start something, I always do all I can to finish it. If you are looking for a solution from a dedicated, professional, and respectful freelancer, your search is over. 🖥 Most of the projects I've completed were made from scratch by me. That provided me with enough expertise in the field to complete tasks of ranging difficulty, as I am familiar with all the stages of development. ⭐️ The fields that I specialize in: • UI/UX Design • Native App Development (Java for Android) • Cross-Platform App Development ( Flutter) • Web App Development (PHP / WordPress ) • Deploying Apps on the App Stores (Guaranteed Clearance in App Stores) What you can expect from me - Explaining to you in detail how an app is created, helping you shape your idea to become a best-selling app, consulting you on various technologies that can be used to build the app, and of course designing and developing a stellar Mobile or Web app for you.A great idea is not enough. But if you are ready to take that idea to the next level, let's talk. Regards Toufiq

20 years in software development in various hats, ranging from Backend dev, API, Integration, Mobile dev, Project and Product management, QA Automation, Application Security, Communication Tools development and Embedded Server Systems development. My favorite technologies range from C/C++ flavors including C, C++, Go and Rust, Java, C#, PHP, Node.js and Typescript, Python and Ruby. In databases I am fluent in RDBMS systems including MySQL and MariaDB, Postgres, SQL Server, SQLite and Oracle, and in NOSQL platforms including Mongo, Redis, Hadoop and DynamoDB. My favorite caching system is Memcached. I have worked with various message queue systems, but most favorite is Amazon SQS. Favorite web application frameworks include Spring in Java, Laravel and Symphony in PHP, Ruby on Rails, Django in Python, ASP.Net MVC in C# and Express.js for Node. Though I have not that much into web frontend development, spending only 6 years out of my two decade career in Frontend, I am versed with Javascript, jQuery, Angular, React and Vue.js, CSS and HTML from version 3 to 5. I am a little bit more into mobile frontend and worked in both native and platform independent mobile including Kotlin, Dart/Flutter and Objective C. I am lucky to have a very diverse industry experience ranging from Embedded systems, Fintech, Communication and streaming tools, Blockchain, Web services and APIs, Web Applications, AI and ML utilities, emergency support system and automation scripting. My hallmark project involvements include Emergency Support systems in two developing countries - 999 emergency service for Eswatini (former Swaziland) and 215 for Cambodian Government, Migrant Tracking and Management System for Bangladesh Government, Core Banking System that powers 9 South Asian Banks and had got featured 9th ranking in its class in Gartner product ranking worldwide during my tenure, world-renowned Tax management software Orbitax Tax Management Expert (TME), various Voice/Video conferencing systems including embedded softphone inside Brother's former MFC product lines, Call center and IVR systems, Blockchain based tool development that interacts with Hyperledger and Ethereum, Instant Messaging services and applications with protocols ranging from SIP/SIMPLE to Jabber/XMPP and intelligent AI chatbots and chat menus with multiple backends including Tawk.to and Natural Language Processing tools including Rasa and ChatGPT. I was fortunate and honored to work with clients from renowned companies including Microsoft, Brothers, Nissan, Pricewaterhousecoopers, Time Warner Group and HP. My favorite project management methodologies have always been sided with Agile flavors, particularly to Kanban. I am versed with CI/CD based systems configuration and management including Teamcity and Jenkins. I am a fan of clean coding and a refactoring freak, and I love DDD and decoupled Hexagonal architectures besides my love for Microservices, but I still love plain-old REST API architecture, and even had to port legacy XML-based WSDL web services to REST two years ago. I try to stick to SOLID development practices and follow secure coding principles from OWASP. I worked in six countries in two continents, and remote-worked for almost all major timezones so my work hour habits are very flexible. I am lucky to always have a very diverse workplace to have as colleagues. I have volunteered in multiple projects, including on-Premise volunteering in last miles of rural Africa, and remote volunteering in space-exploration related projects and remote moderation as an ally in local and international LGBTQIA+ communities. Unfortunately, my footsteps had been more into remote and also hybrid development for regular full time workplaces. I have worked Freelance for clients and employers who had known me by reputations for quite a while, and therefore never needed to explore freelance marketplaces much such as Upwork. A very recent accident made me unable to commute at least for months, and therefore I am now open and eager to seek freelance projects from outsourcing marketplace like Upwork as well. I am fine with all types of contracts - Fixed price, Hourly, Full-time, Part-time or Contractual. Looking forward eagerly to work with you all. I am an eager learner, and therefore if your work involves challenges of learning a new technology or methodology, please feel free to involve me. I hope my work will speak for me more than an introductory text. Please let me know if you have any questions or need any assistance or clarifications. Thank you very much for your precious time spent of my profile!