I'm a Full-Stack Software Engineer with 10+ years of experience building scalable SaaS platforms, healthcare applications, education management systems, and enterprise-grade business software. I specialize in React.js, Node.js, TypeScript, Laravel, and modern cloud-based architectures, helping startups and established businesses transform complex requirements into reliable, user-friendly products. Whether you're building a healthcare platform, multi-tenant SaaS application, patient management system, school ERP, or custom business workflow solution, I bring both technical expertise and product-thinking to ensure your platform is built for long-term growth. What I Do Best: --------------------------- -Build multi-role SaaS platforms with complex permission systems, audit trails, and domain-specific workflows -Design and develop clinical/patient management systems, school ERP platforms, and enterprise admin dashboards -Architect REST & GraphQL APIs that scale cleanly as your product grows -Deliver cross-platform mobile apps (iOS & Android) that stay in sync with your web platform Why Clients Work With Me: --------------------------- -I've worked in regulated industries — I understand compliance, data sensitivity, and why cutting corners costs more later -My code is clean, documented, and built for the next developer, not just the next deadline -I communicate proactively — you'll never wonder what's happening or when it's done -I think about your product's 2-year roadmap, not just the current ticket Why I am right fit: --------------------------- I'm the right fit if you're building a serious SaaS product — not an MVP you'll throw away, but a platform you intend to grow, scale, and maintain. Ideal if you're in healthcare, education, fintech, or any domain where structured data, access control, and reliability aren't optional. If you need a developer who understands both the technology and the business behind it — let's talk. Share what you're building and I'll tell you honestly if I'm the right fit.

I have a BTech in Information Management Technology, and i have been programming since 2008. I have worked on and deployed so many software projects, many of which are been used in production environment you can visit my linked In page to see more works that i have done since started working as a professional.

AI-powered development — what I build now AI agents & multi-agent systems — autonomous task runners, tool-using agents, LangChain/LangGraph pipelines, OpenAI Assistants API LLM integrations — GPT-4o, Claude, Gemini wired into your product for chat, summarization, classification, extraction RAG systems — Retrieval-Augmented Generation with vector databases (Pinecone, pgvector, Chroma) so your AI answers from your own data Workflow automation — n8n, Make, Zapier, custom Node.js pipelines; replace repetitive human tasks with intelligent automation AI-enhanced scraping — combine Playwright + LLMs to extract, clean, and structure unstructured web data at scale Voice & chatbot interfaces — React/React Native chat UIs backed by streaming LLM APIs with memory and context

I have 25 years of IT experience. My strengths are: 1. I am technically Strong. Has strong hands on skills. 2. I have strong designing skills. 3. I have experience Managing Projects and skills in many Project Management Tools. My Skills: 1. All PM tools - MS Project, ChangePoint etc. 2. Hands On experience on Excel VBA and Excel Add-In for all kinds of requirements. 3. Hands on experience in HTML5, Javascript, Jquery, Bootstrap 4. PHP Laravel, MySQL, Amazon RDS, Azure SQL 5. Google Workspace Add-Ons 6. Google App Script, Google Data Studio, Corezoid 7. Hands on experience on Java, Android UI development. 8.Facebook API, Amazon MWS API, twilio API, ringcentral API, Signalwire API 9. CRM: Zendesk and Hubspot, 10. Payments: Stripe Payments.

🚀 Top 1% on Upwork |🌟 100% Job Success | 🕐 10K+ Billable Hours 👨‍💻 8+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 💻 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐢𝐧𝐠 𝐢𝐧 𝐑𝐞𝐚𝐜𝐭, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐕𝐮𝐞.𝐣𝐬, 𝐋𝐚𝐫𝐚𝐯𝐞𝐥, 𝐏𝐇𝐏, 𝐇𝐓𝐌𝐋/𝐂𝐒𝐒, 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 ⚡ 𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞, 𝐒𝐞𝐜𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐇𝐢𝐠𝐡-𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐌𝐲 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬 𝐢𝐧 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ✅ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Strong experience in developing secure, scalable server-side logic using Node.js, Express.js, Laravel, and PHP. I ensure optimal performance and seamless integrations with databases, third-party APIs, and more. ✅ 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Creating and integrating RESTful and GraphQL APIs to enhance functionality, ensuring that applications communicate efficiently with the server and external services. ✅ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Experienced with MySQL, PostgreSQL, MongoDB, and Firebase. I ensure smooth and efficient data management, including migrations, optimizations, and backup solutions. ✅ 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 & 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲: Implementing secure authentication systems (OAuth, JWT) and advanced security measures to safeguard your application and user data against potential vulnerabilities. ✅ 𝐕𝐞𝐫𝐬𝐢𝐨𝐧 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 & 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧: Proficient in Git, GitHub, and Bitbucket, ensuring smooth collaboration in team environments and proper versioning for codebase management. ✅ 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 & 𝐃𝐞𝐯𝐎𝐩𝐬: Experience with deploying applications on platforms like AWS, Google Cloud, Heroku, and DigitalOcean, ensuring smooth CI/CD pipelines for rapid updates. 🔥 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? 🔥𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬: I provide full-cycle development, from ideation to deployment, ensuring all aspects of your application are tailored to your specific needs. 🔥𝐏𝐚𝐬𝐬𝐢𝐨𝐧 & 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲: Coding is my passion, and I take pride in delivering high-quality, maintainable code while exceeding client expectations every time. 🔥𝐂𝐨𝐧𝐭𝐢𝐧𝐮𝐨𝐮𝐬 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠: I stay up-to-date with the latest technologies and best practices, ensuring your project benefits from the most modern and efficient solutions. 🔥 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧: Your satisfaction is my priority. I communicate regularly, provide timely updates, and deliver projects on time and within budget. If you're looking to turn your full-stack development vision into reality, let’s collaborate and bring your ideas to life! 🙌 Feel free to reach out and let’s explore the endless possibilities for your project. 𝑩𝒆𝒔𝒕 𝒓𝒆𝒈𝒂𝒓𝒅𝒔, Randeep Singh

✅Let's start with a quick consultation or a small initial milestone so you can see I'm the right fit. 🔥PROVEN BUSINESS IMPACT - 7+ Years of engineering and building enterprise-grade applications as a .NET developer in high-stakes environments. - ROI-Driven Development: $2.5M+ in verified client impact, leveraging my background as a full stack developer to increase revenue and reduce operational overhead through expert software development. - Performance Engineering: 90% faster data processing and 75% lower infrastructure costs achieved through advanced Microservices and optimization as a senior .NET developer proficient in ASP.NET Core. - Scalability & Growth: Scaled platforms to 30,000+ active users; consistently cut time-to-market for MVPs by 4–6 weeks by applying the expertise of a seasoned full stack developer. - Legacy Modernization: Proven track record as a .NET developer migrating legacy systems - including .NET Framework and .NET Compact Framework - to modern architectures, resulting in 40% fewer bugs. - Efficiency Gains: Reduced admin friction by 45% through custom-built automation, demonstrating the value a dedicated full-stack developer brings to complex SQL-driven workflows. 👨🏻‍💻THE PARTNERSHIP EXPERIENCE - Full-Stack Authority: Microsoft-certified expertise spanning the entire development lifecycle, from robust C# backend architecture to dynamic frontend interfaces. - Versatile Tech Lead: Whether you need a full stack developer for MVP creation, a .NET developer for enterprise scale, or a java developer for backend migration, I bridge the gap between technical requirements and business goals. I also offer the flexibility of a java developer for interoperability, and the analytical power of a python developer for data-heavy tasks. - Agile & Transparent: High-velocity delivery using JIRA/Asana, providing the clear, consistent communication expected from a senior full-stack developer. ⚙️ ENGINEERING CAPABILITIES - Backend Architecture: Building high-throughput systems with C#, ASP.NET Core, and ASP.NET Web API. I also offer the flexibility of a java developer to integrate with diverse existing ecosystems. - Modern Frontend: Crafting dynamic UI/UX using Angular, React, and JavaScript. My deep experience with HTML5, CSS 3, and Bootstrap ensures highly responsive, mobile-first designs. - Cloud & Infrastructure: End-to-end management of cloud-native ecosystems (Azure/AWS) and containerized deployment pipelines as a lead .NET developer. - Data & Performance: Advanced database design using Microsoft SQL Server and complex SQL queries to cut data latencies by up to 50%. - Cross-Functional Skills: I bring the architectural discipline of a .NET developer - including ASP.NET MVC and ASP.NET expertise - to every project, while also offering the modern tooling mindset of a full stack developer using Node.js. 🏆 DOMAIN SPECIALTIES - FinTech: Secure ledger systems and transaction management built by a specialized .NET developer. - Healthcare: HIPAA-compliant patient management portals and telehealth solutions. - LegalTech/Enterprise: Complex document workflows and granular RBAC. ⚒️ TECHNICAL TOOLSET - The .NET Stack: .NET Framework, .NET Compact Framework, ASP.NET Core, ASP.NET Web API, ASP.NET MVC, ASP.NET, C#. - Frontend Mastery: Angular, React, JavaScript, HTML5, CSS 3, Bootstrap, jQuery. - Data Layer: Microsoft SQL Server, SQL, Redis, MongoDB, ElasticSearch. - General Stack: Node.js, Python, Docker, CI/CD. - Engineering Standard: Clean Architecture, SOLID Principles, and an uncompromising focus on software development quality. 📩If you’re looking for a reliable and experienced .NET Developer and full stack development partner who understands both technology and business impact, I’d be happy to connect - feel free to invite me for an interview!

I'm Costel, a seasoned Expert Full-Stack Developer with 20 years of experience and a Master’s in Computer Science, specializing in Custom Web Applications and WordPress. My expertise encompasses a broad range of solutions, including bespoke web applications, CMS, ERP systems, API development & integrations, e-commerce, as well as comprehensive WordPress front-end and back-end services. My approach prioritizes quality, performance, and scalability, ensuring each project not only meets but exceeds expectations. My expertise includes: - Custom web applications using Laravel, PHP/MySQL/HTML/CSS/JS (I've developed tens of custom complex systems eg: order management systems, production planning/tracking, invoicing, inventory management, email marketing solutions, job listings, medical platforms, web portals, etc.) - CMS / ERP systems - API development & integrations - WordPress bespoke themes, plugins, customizations - WooCommerce & Prestashop e-commerce solutions - Websites speed optimizations I ensure lightweight, robust solutions, optimized for speed and SEO, tailored to drive results and conversions. My commitment is reflected in my Upwork success, with a record of high ratings and client satisfaction, representing a recent yet significant part of my extensive career. What sets me apart? - Exceptional communication, projects/task understanding, always bringing innovative ideas and solutions - High-quality delivery, minimizing revisions and bugs - Reliability in meeting deadlines, with a well-organized approach - Passion and dedication to every project, ensuring 100% commitment - Agility and flexibility, adapting to the dynamic nature of software projects I’m here to make sure your project thrives, countering the industry’s trend of delays and budget overruns. Partner with me for a seamless, successful development experience.

100 % payment after 100% work done I am a LMS web development expert with 10+ year of experience.I have expertise in LMS website development,online courses and video courses which includes paid as well free membership to access Educational contents related to Medical, Finance, Art, Yoga etc.. Have worked with LMS platforms like 1 - Moodle 2 - LearnDash 3 - WPMLS 4 - EDX 5-Totara 6-Ontraport 7- Cornerstone 8- LearnWorld 9- Kajabi 10 - MemberPress 11- Tutor LMS 12- Talent LMS And all other LMS and OpenSIS developer

𝑯𝒊, 𝑰'𝒎 𝑹𝒂𝒌𝒆𝒔𝒉 — 𝑬𝒙𝒑𝒆𝒓𝒕 𝑭𝒖𝒍𝒍-𝑺𝒕𝒂𝒄𝒌 𝑫𝒆𝒗𝒆𝒍𝒐𝒑𝒆𝒓 💼 8+ 𝐘𝐞𝐚𝐫𝐬 | 🚀 139+ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 | ⭐ 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 I’m a Full Stack & AI-Powered Web Application Developer with 8+ years of experience building scalable web solutions for startups and small businesses. My work blends cutting-edge AI integrations with robust front-end and back-end development to deliver smart, responsive, and user-centric applications. AI Integration is my specialty. Whether it's building an AI content generator, integrating OpenAI/Gemini into web apps, or enhancing UX with AI-based personalization, I bring innovative solutions to life. I also work with n8n, an open-source workflow automation platform, to design and deploy custom automations that connect various services and streamline business operations. From automating lead flows and marketing tasks to integrating CRMs, webhooks, and APIs, I build efficient, scalable workflows that save time and reduce manual work. List of my expertise with various tech stacks: AI-Powered Web App (React + OpenAI / Gemini) SaaS MVP Development Website with AI Blog Writer & Scheduler E-commerce Store with AI Product Recommender Convert Figma to Next.js with Tailwind Landing Page with AI Lead Scoring React + Firebase Job Board / Marketplace Responsive design Third-party integrations via API Payment gateway integration Social media logins Geo-location implementation My proficiency comprises: Custom web application development CMS: WordPress, Joomla, Drupal PHP Frameworks: Laravel, Symfony, CakePHP, Zend, CodeIgniter, Yii ROR Framework, Python, Django APIs: RESTful, SOAP-based, OAuth-based APIs, Shipping APIs – UPS, USPS, FedEx, Amazon APIs (MTurk, SimpleDB), and Google APIs E-Commerce Website Development – Magento, BigCommerce, Shopify, OpenCart, osCommerce, PrestaShop Interactive Front-End Web Development: HTML, XHTML, XML, CURL, CSS, Twitter Bootstrap JavaScript MVC libraries and frameworks including: Bubble io, Backbone js, Ember, Knockout js, Ext JS, AngularJS, Node js & MEAN JS I also specialize in building all types of calculators like simple input-output tools to complex financial, tax, health, and logic-based calculators. Whether it's in Excel, Google Sheets, or web-based (JavaScript, React, etc.), I create fast, user-friendly, and error-proof tools tailored to your exact needs. Custom Excel & Google Sheets Calculators Financial & Tax Calculators (IRMAA, QCD, RMD, ROI, etc.) Health & Fitness Calculators (BMI, BMR, etc.) Web-based Calculators with live inputs and dynamic logic Error validation, styling, and mobile responsiveness AI Developer | AI Engineer | Artificial Intelligence Solutions | Machine Learning Developer | Deep Learning Developer | AI Model Integration | Natural Language Processing (NLP) | Computer Vision Expert | AI Chatbot Developer | N8N Developer | PyTorch Developer | OpenAI Integration | AI-Powered Web Apps | AI Automation Services | Custom AI Models | AI Workflow Optimization | AI in E-commerce | AI-Based Recommendations | AI-Powered Analytics | AI SaaS Solutions | AI-Powered CRMs | AI Prompt Engineering | AI Content Generation | AI Personalization Systems | Full Stack Developer | Full Stack Engineer | MERN Stack Developer | MEVN Stack Developer | Frontend & Backend Expert | RESTful API Developer | GraphQL Developer | End-to-End Web Solutions | JavaScript Full Stack | TypeScript Developer | Web App Development | Full Stack App Architect | SaaS Product Developer | MVC Architecture Expert | API Integration Services | Full Stack Consulting | Full Stack Performance Optimization | Full Stack Debugging | CI/CD Implementation | GitHub Actions & Deployment |

Hello! I’m Shubham, a senior web developer with over 10 years of experience in building high-performance websites and web applications, with a strong focus on e-commerce platforms. I specialize in Shopify, WooCommerce, and WordPress, helping startups and growing businesses create powerful online stores and digital experiences tailored to their unique needs. 💼 My Core Expertise Includes: Shopify Development: Custom theme design, theme customization, and Shopify app development (both public and private). I've built multiple Shopify stores and published apps that help increase sales, improve customer experience, and automate store functionality. WooCommerce & WordPress: End-to-end development of WooCommerce stores, custom plugin creation, payment gateway integrations, and performance optimization. I also offer WordPress theme and plugin development, content migration, and security enhancements. Custom E-commerce Solutions: Development of complex B2B and B2C systems with features like dynamic pricing, tiered discounts, product bundling, upselling, subscription billing, loyalty programs, and more. LMS Platforms: Expertise in building Learning Management Systems using WordPress-based tools like LearnDash, Tutor LMS, and LifterLMS, suitable for educators and training businesses. Optimization & SEO: Mobile responsiveness, speed optimization (Google PageSpeed, GTmetrix), and on-page SEO to ensure your website performs well in both search rankings and user experience. Ongoing Support & Maintenance: Regular updates, bug fixes, feature enhancements, and technical support to keep your store running smoothly. ✅ Why Work With Me? I’m a Top Rated Plus freelancer on Upwork, known for my professionalism, clear communication, and commitment to deadlines. My approach is always client-focused — I take time to understand your business goals and deliver solutions that not only meet but exceed expectations. Whether you're looking to build a new online store, customize an existing one, or need ongoing development support, I bring the experience, skills, and dedication to make your project a success. Let’s connect and explore how I can help you grow your online presence!