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𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐑𝐞𝐚𝐜𝐭.𝐣𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐋𝐚𝐫𝐚𝐯𝐞𝐥 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐏𝐲𝐭𝐡𝐨𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐌𝐄𝐑𝐍 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐀𝐈 𝐚𝐧𝐝 𝐋𝐋𝐌 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐀𝐈 𝐀𝐣𝐞𝐧𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐣𝐚𝐯𝐚𝐬𝐜𝐫i𝐩𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐌VP 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐀𝐈 𝐚𝐠𝐞𝐧𝐭𝐬, 𝐜𝐡𝐚𝐭𝐛𝐨𝐭𝐬, 𝐚𝐧𝐝 𝐋𝐋𝐌-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 🎯 I've developed 200+ websites and web applications that power businesses worth $50M+. Over 10 years of web development experience. 🏅 Ranked Top 1% on Upwork worldwide. I help startups and established businesses elevate their online presence by creating superior, user-friendly web solutions 🌟 Here are some of the results my clients are getting: ✔️ "Since the new site launch, our online sales have skyrocketed by 300%!" ✔️ "With your website overhaul, customer engagement and sign-ups have magnified by 500%!" ✔️ "Your full-stack development expertise ensured our app and e-commerce platform integrated seamlessly, amplifying our revenue by over $2M!" ✔️ "After your redesign, our website won the Web Excellence Award for best User Interface and User Experience!" 🔥 My clients have seen a 3X-5X increase in web traffic and at least a 2X improvement in their return on investment (ROI). 🌟 Although I can't support everyone, we might be an excellent partnership if your thoughts resonate with the following: ✔️ "There's a huge digital market to tap into, and I need the BEST to conquer it." ✔️ "I understand my business intricacies, but maybe I lack the technical finesse." ✔️ "I'm NOT a tech whiz, and I don't have the spare time to tinker with complex coding!" ✔️ "Our previous digital presence was disappointing - I can't afford such a setback again." ✔️ "Our business strategy has evolved since our last platform update!" ✔️ "I require a sleek, responsive, and high-performance website or app that can perfectly mirror my business's ethos and objectives." 🌟 Working with me, you'll: ✔️ Bid farewell to technical headaches. ✔️ Experience seamless, transparent communication that ensures your vision is executed to perfection. ✔️ Receive a project completed within budget, with no surprise charges. ✔️ Get on-time delivery as per schedule, keeping your project on track and in line with your goals. ✔️ Show your business in the best light to your users and potential investors. ✔️ Get turnkey, web-grade, futureproofed solutions that drive user engagement and revenue. ✔️ Harness the same cutting-edge web strategies employed by successful digital entrepreneurs. 🌟 My clients have a LOT to say about me: ✅ "Saimul does incredible work! He is super passionate about his work, he consistently went above and beyond the normal worker here on Upwork." ✅ "The communication was always smooth, he is very proactive and easy to reach." ✅ "He has been very solution-oriented, with a lot of skills in his field of work" ✅ "Saimul - provides exceptional work! He is a great listener and translates my requirements into a great product." ✅ "Very pleased with the excellent work, attention to detail, and willingness to run the extra mile for us. 🌟 My stats: ✅ Ranked Top 1% globally on Upwork in Web, Mobile & Software Development Category ✅ $50M+ in client revenue facilitated through the platforms I've built ✅ Clients reporting an average 300% increase in user engagement ✅ Over 100+ high-performance websites and applications developed ✅ Over 200+ successful project deliveries ✅ Over 50% Repeat Clients. ✅ 100% Success Rate with all projects 🌟 ABOUT ME With over 6 years as a full-stack developer, my experience spans both B2B and B2C landscapes. Coding isn't just my career; it's my joy. I take pride in crafting unique solutions and translating them into code to meet your business goals. 🌟 My Tech Skills ✔️ React.js ✔️ Next.js ✔️ React Native ✔️ JavaScript ✔️ HTML ✔️ CSS ✔️ TailwindCSS ✔️ Node.js ✔️ Express.js ✔️ Web Design ✔️ Web Development ✔️ Android Development ✔️ IOS Development ✔️ Mobile App Development ✔️ MongoDB ✔️ MySQL ✔️ PostGre ✔️ MERN Stack ✔️ REST API ✔️ GraphQL ✔️ Redis ✔️ Firebase ✔️ Docker ✔️ Nginx ✔️ Git ✔️ TypeScript 🌟 My CMS & SAAS Skills ✔️ WordPress ✔️ Shopify ✔️ Wix ✔️ Strapi ✔️ Contentful ✔️ Sanity ✔️ SquareSpace ✔️ Kajabi ✔️ BigCommerce ✔️ Webflow ✔️ Thinkific ✔️Unbounce 🌟Industries: Consumer, Luxury, Manufacturing, Hospitality, E-commerce, Travel, Healthcare, Medtech, B2B, SaaS, Tech, Education, Finance, Fintech, Entertainment, Real Estate, Business, Nonprofit, Online Communities, Podcasting, Blog, Portfolio, Job Board, Portal, Machine Learning, AI & OpenAI, ChatGPT, Retail, Logistics, Automotive, Energy, Legal, Human Resources, Agriculture, Government, Sports, Media & Publishing 🌟 HOW TO BEGIN → Just click the "Invite/Message" button at the top of my profile and let's organize a call about your project. I'm here to help, every step of the way.

Need a High-Performance, Secure & Scalable Backend for your SaaS, AI App, or Business Platform? I am a Top-Rated Backend Developer specializing in Node.js, NestJS, FastAPI, and Cloud Systems (AWS/Azure/Docker). Over the last 2+ years with a 100% Job Success Rate, I've helped startups and enterprise businesses build production-ready backend platforms from MVP to scale. Whether you need a microservices architecture, complex API integrations, or database optimization, I deliver clean, secure, and maintainable code built for long-term growth. ⚡ CORE SERVICES I PROVIDE • Custom API Development: Scalable REST & GraphQL APIs with clean architecture. • Multi-Tenant SaaS Backends: Full-stack SaaS architecture, RBAC, Auth, and subscription models. • Third-Party Integrations: Stripe, OpenAI/AI APIs, Webhooks, OAuth, and payment gateways. • Database Optimization: PostgreSQL, MongoDB, Redis caching, indexing, and high-load querying. • DevOps & Microservices: Docker, AWS, Azure, Nginx, CI/CD pipelines, background queues, and event-driven systems. 🛠 TECH STACK & TOOLS • Frameworks: Node.js, NestJS, Express.js, FastAPI, Python, TypeScript • Databases: PostgreSQL, MongoDB, Redis, Prisma, TypeORM • Cloud & DevOps: AWS (EC2, S3, ECS), Azure, Docker, Nginx, VPS, CI/CD, Linux • Security: JWT, OAuth 2.0, RBAC, MFA, API Rate Limiting 🏆 WHY WORK WITH ME? ✔ Clean & Production-Ready Code – Easy to maintain and expand by any dev team. ✔ Business-Focused Solutions – Prioritizing speed, security, and low operational cost. ✔ Reliable Communication – Fast response times, daily updates, and zero guesswork. If you are launching an MVP, modernizing legacy backend code, or building an enterprise system—let's talk. 📩 Send me a message or invite me to your job post to discuss your architecture!

Most backends look fine in a demo and fall apart the moment real traffic hits. I build the ones that hold up. Over the last 5+ years I've shipped production systems that process 100M+ records a month, power SaaS products thousands of people use daily, and keep running when load spikes instead of paging someone at 2am. If you're a startup or SaaS team, the problem usually isn't writing code. It's that the system got built fast to ship an MVP, and now it's slow, fragile, or hard to extend without something else breaking. The work I'm best at is taking a system from "it works for now" to "it scales and we trust it." TECH STACK & SKILLS Backend: Node.js, Express.js, NestJS, TypeScript APIs & Architecture: REST APIs, Microservices, Multi-Tenant SaaS Real-Time: WebSockets, SocketIO Databases: PostgreSQL, MSSQL, MongoDB, query optimization Queues & Background Jobs: Redis, BullMQ, event-driven processing Frontend / Full-Stack: React, Next.js DevOps & Cloud: Docker, Kubernetes, AWS WHAT I CAN HELP WITH - Building a new product or MVP from scratch - Designing scalable REST APIs and microservices - Real-time apps that stay in sync under load - Multi-tenant SaaS platforms - Database design and performance tuning - Queue systems, background workers, and reporting pipelines - Optimizing or rescuing an existing system that has outgrown its setup RECENT WORK - A real-time machine monitoring and analytics platform handling 100M+ records per month - Event-driven pipelines built with Redis, BullMQ, and WebSockets - Production SaaS applications serving thousands of active users - Reporting systems and background workers for enterprise clients running business-critical data I write maintainable, production-ready code with a clear paper trail, not quick fixes that become next quarter's emergency. I'm a strong fit if you want someone who owns the technical side and thinks a step ahead. Probably not your person for a one-off $20 script tweak. If this sounds like your situation, send me a short note about what you're building and where it's stuck. I'll tell you honestly whether I'm the right fit and how I'd approach it.

Hello! I am a Full-Stack Developer pursuing a Bachelor of Science (BSc) in Computer Science and Engineering from European University Of Bangladesh, with over 3 years of professional software development experience. I am highly experienced in full-stack web development using JavaScript, TypeScript, Nest Js, and Next Js. I have a solid working experience building event-driven systems and real-time applications, utilizing tools like RabbitMQ, Redis, and Socket IO for decoupled microservices and live chat solutions. I work extensively with databases and ORMs including PostgreSQL, MongoDB, Mongoose, and Prisma ORM. Additionally, I design responsive frontends using React Js, Tailwind CSS, and Shadcn UI, integrate third-party APIs such as Stripe, Paystack, and OpenAI, and handle DevOps tasks like containerizing environments with Docker and deploying them securely onto Linux VPS servers using AWS. When working on a new project, I like to speak with my clients so that I can have a clear understanding of their needs and vision of the project. Thank you in advance for your time and consideration. I look forward to working with you soon.

Abp framework expert. Skilled in .NET, Angular, Razor, Blazor, and jQuery. Proficient in microservices, modular monolith, and monolithic architectures. Independent, adaptable, and quick to learn under pressure.

Full Stack Software Engineer |Golang, Angular.Js, React.js, Next.js · Node.js · Nest.js · React Native .Electron.js I'm a Full Stack Developer with 4+ years of experience building scalable web and mobile applications that drive business growth. I specialize in turning complex requirements into elegant, high-performance solutions using modern JavaScript technologies. From startups to established businesses, I deliver end-to-end development services—taking your project from concept through deployment with clean, maintainable code and reliable architecture. What I Build SaaS Platforms Scalable multi-tenant applications designed to handle thousands of concurrent users with React frontends and Node.js backends. Web Applications Modern, responsive interfaces using React.js, Next.js, and TypeScript—optimized for conversion and user engagement. Mobile Applications Cross-platform iOS and Android apps with React Native, delivering native performance with shared codebases. Desktop Applications Cross-platform Windows, Linux, and Mac software with Electron.js, delivering native performance with shared codebases. RESTful APIs Secure, well-documented backend services using Node.js, Express, and Nest.js with Prisma, TypeORM, or Drizzle. Third-Party Integrations Seamless integration of payment gateways (Stripe, PayPal), AI services (OpenAI), cloud platforms (AWS), and business tools. Technical Expertise Frontend React.js · Electron.js Next.js · React Native · TypeScript · Tailwind CSS · Redux Backend Node.js · Golang, Express.js · Nest.js · RESTful APIs · Microservices Databases PostgreSQL · MySQL · MongoDB · Firebase · Prisma · TypeORM DevOps & Cloud AWS (Certified) · Docker · CI/CD · Git · Linux Desktop Electron.js for cross-platform desktop applications Why Work With Me Business-Focused Development I understand SaaS metrics, user acquisition, and ROI—not just code. Every technical decision supports your business objectives. Production-Ready Code Clean, tested, and documented code that scales. I write with your future team in mind, making maintenance and feature additions seamless. Transparent Communication Regular updates, clear timelines, and proactive problem-solving. You'll always know where your project stands. End-to-End Ownership From architecture design to deployment and monitoring, I take full responsibility for delivering solutions that work. Let's Build Something Great If you need a Full Stack Developer who combines technical excellence with business acumen, I'd love to discuss your project. Click "Invite to Job" to start the conversation. Specialties: MERN Stack · SaaS Development · API Architecture · Cloud Infrastructure · Mobile Development 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full Stack Developer | Full Stack Developer Go. Node.js Developer | Nest js| Electron js | React Developer | React.js Developer | MERN Stack Developer | App Developer || SaaS Application Development |App Developer | API Development | RESTful API | Backend Developer | Frontend Developer | React Node.js Full Stack | PHP Developer | Next.js | TypeScript | AWS | Database Design | Custom Web Solutions | Full Stack Developer Expert | SaaS Expert | Laravel Vue | Node.js Backend | Full Stack Developer | Full Stack Developer | Full Stack Developer | Full Stack Developer Expert | PHP Developer | React | API Integration | Angular | Node.js | Full-Stack Development | Web Application | JavaScript | HTML | API | MySQL | Vue.js | | Full Stack | Mobile App Developer | SaaS Application Development | Full Stack SaaS Developer | MERN Stack Developer | MEAN Stack Developer | go lang Developer | Laravel Full Stack Developer | React Native Developer | JavaScript Developer | Node.js Developer | React Developer | Next.js Developer | Backend Developer | API Developer | REST API | MongoDB | PostgreSQL | MySQL | PERN Stack Developer | React.js | React Node Developer | Full Stack MERN Developer | MERN Developer | MEAN Developer | Node.js Backend Developer | Microservices | Multi-Tenant SaaS | DevOps | AWS | Google Cloud | CI/CD | Web Developer | Web Application Development | Full Stack React Developer | Full Stack Node.js Developer | Full Stack Angular Developer | SaaS Expert | React Full Stack Developer | Node Full Stack Developer | Angular Full Stack Developer | MERN Node.js Developer | React Developer | React Native Mobile Apps | JavaScript/ TypeScript Full Stack Developer | SaaS || ERP Full Stack Developer | Full Stack Expert | Full Stack Specialist | React Developer | Node.js Developer | MERN Stack Developer | Backend Developer | React.js | Node.js | Senior Full Stack Developer | Full Stack Specialist | App Developer