Hire the Best dotCMS Professionals

I’m a senior .NET full-stack developer and architect with over 15+ years of experience building secure, scalable, and high-performing digital platforms. My core expertise is in enterprise CMS and DXP solutions, with deep hands-on experience in Sitecore, Sitefinity, Umbraco and Optimzely. I help companies modernize and scale their digital ecosystems by combining strong architecture, clean engineering practices, and AI-assisted development - always guided by human judgment and production-ready standards. → CMS & DXP Specialization Extensive experience with Sitecore (v8–10+), Sitefinity (v4.1–15+), and Umbraco across MVC, headless, and hybrid architectures. My focus is on performance, maintainability, and long-term scalability. → Architecture & Best Practices Strong background in Sitecore Helix principles, modular design, and reusable components. I design systems that are easy to extend, test, and support as business needs grow. → Headless & Modern Frontend Hands-on experience building headless CMS solutions using React, Next.js, and Vue, integrated via REST and GraphQL APIs for fast, flexible, and AI-ready digital experiences. → Backend, Integrations & Cloud Expert in C#, Dot NET Core, and Web API development, with solid experience in enterprise integrations, Azure environments, CI/CD pipelines, and performance optimization. → AI-Focused, Human-Driven Delivery I use AI tools to accelerate development, improve code quality, and enhance consistency—while ensuring every solution is fully reviewed, secure, and built to enterprise standards. → Certifications & Professional Trust 4x Sitecore Certified Professional 4x Sitefinity Certified Professional Certified ScrumMaster → How I Work I take ownership, communicate clearly, and deliver production-ready solutions with minimal ramp-up. Clients value my ability to quickly understand complex systems and provide reliable, long-term results. I’m currently offering my senior-level expertise at competitive rates and am open to long-term, high-impact projects. If you’re looking for a dependable Sitecore, Sitefinity, Umbraco or Optimizely expert who can architect and scale your platform with confidence, let’s connect.

Free 30-Minute Strategy Call — Let’s Build Something Great Senior Full-Stack Developer | 7+ Years of Proven Results I’m a senior Full-Stack Developer with 7+ years of experience in industry and now full time freelancer delivering robust, scalable web, mobile, and enterprise applications. I help businesses in Healthcare, E-commerce, Financial Services, and CRM turn complex requirements into reliable, high-performance solutions. I handle the entire development lifecycle from architecture and development to deployment and long-term maintenance ensuring speed, quality, and scalability at every stage. Why Work With Me? Proven Delivery: 100+ successfully delivered projects across multiple industries End-to-End Expertise: Frontend, backend, cloud, CMS, and automation Scalable Engineering: Clean, maintainable code built for long-term growth Client-Focused: Clear communication, on-time delivery, and reliable support Tech-Forward: Always aligned with modern tools, frameworks, and best practices Core Technical Skills: Full-Stack Development ASP.NET Core, C#, React js, Next.js, Node.js,Blazor, JavaScript, electron Frameworks & Platforms .NET, Laravel, Salesforce, React, AngularJS CMS Expertise Strapi, DNN, Orchard Core, Sitefinity, Umbraco, WordPress, Webflow Databases MS SQL Server, Postgress, MySQL, Entity Framework, Firebase Cloud & DevOps AWS, Azure, VPS, AliBaba, Docker, CI/CD pipelines Automation Make, n8n, Zappier Version Control Gitllab, Github,SVN Legacy & Modern Desktop Engineering: Legacy Systems Specialist: VB6, WinForms, ASP Classic maintenance and modernization Cross-Era Engineering: WPF to MAUI migrations, hybrid desktop apps, and legacy-to-API integrations. Recent Project Highlights: Global e-commerce platform built with ASP.NET Core and Angular Secure cross-platform healthcare application with backend integrations Custom CRM system with advanced analytics and reporting Cloud-deployed inventory management solution Business workflow automation using Make and n8n Infrastructure & Hosting Experience: AWS: ECS (Fargate), EC2, S3, RDS, Route S3, IAM Firebase: Hosting, Firestore Web Hosting: VPS, Nginx, cPanel Deployment Platforms: Vercel, DigitalOcean , Hostinger Security & Performance: Cloudflare 🤝 Let’s Work Together If you’re looking for a reliable senior developer who delivers results, communicates clearly, and adds long-term value to your product—I’d be happy to help. Let’s discuss your goals and build something scalable, secure, and future-ready.

I am TOP 5% on Upwork. I have many experiences in IT field as a programmer especially in desktop and web development for more than 10 years. My Expertises : PHP Framework : Laravel (Filament), CodeIgniter, Symfony (Twig, Doctrine-ORM) CMS : Wordpress, Joomla, Magento, Magento 2, BigCommerce, Shopify, Volusion, ActiveCollabs, Business Catalyst, Cms Builder, Optimize Press, OSCLASS (CMS for classified sites), Orodha, Hesk (CMS for Helpdesk), Sharetribe, Open Journal System (OJS), Craft CMS Nocode: Wix, Wix Corvid/Velo, Squarespace, Webflow, Arcadier OS : Linux Ubuntu, Centos, Windows, OSX Server : Ubuntu on VPS and AWS EC2, AWS Cloudfront, Alibaba Clouds ECS (Centos), CloudWays Server, Siteground, Mail Setting (DKIM, SPF, etc), CloudFlare, ActiveCampaign Web Server: Apache, NGINX, Tomcat Web Services: Varnish, Redis, SOAP/REST/OAuth, Webhook, CronJob Programming Language : PHP (OOP, MVC, Debugging, xdebug), C#, VB, Java, Python, C++, Rust, NodeJS (Nest JS, Typescript, Prisma, Directus) Database : MySQL, SQL Server, MongoDB, PostgreSQL CRM : Zendesk, CommCare, Hubspot (API, HubL, Custom Quote Template) API/Webhook Development : Twitter, Agoda, Pin Payment, Office Auto Pilot/Ontraport, Instagram, CarQuery, Facebook, Oodle, Stripe, Paypl, Github, BigPost, SinoGoodies, ChinaBrand, Dropbox, Zendesk, Zippay/Zipmoney, Google Maps, Google Sheets, Open Street Map (OSM), OneDrive, CommCare, Hubspot, ThriveCart, Simpro, TSheets, Innosend, Afterpay, SendGrid Inbound Parse, Real Estate IDX/MLS, RETS 1.8, RETS 1.9 (VirtualRETS), BridgeDataOutput, RESO, PlugAndPay, Microsoft Outlook OAuth2, Google Gmail OAuth2, Twilio Messaging, ConvertKit Project Management Tools : JIRA/Atlassian, Github Zenhub, Trello, Miro, Notion Wordpress Plugin: WP Pro Quiz, Elementor Pro, Woocommerce, LearnDash, Tutor Pro LMS, Ultimate Member, WP Events Calendar, W3 Total Cache (W3TC), Drawing Tools, Advanced Custom Fields(ACF), Equation Editor, TinyMCE, Gravity Form, Estatik Houzez Real Estate, Adverse Childhood Experiences (ACEs) Quiz, etc Other : CSS, XML, JavaScript, JQuery, Ajax, Node JS, React JS, AngularJS, Vue JS, Reporting tools, Twitter & JQuery UI Bootstrap, Amazon S3, Email Newsletter, Simple Invoices, Smarty, Python Scrapy, Image Magick (Imagick), Virtuemart, Fancybox, Flowplayer, Mozilla PDF.js, OpenCV, Open Street Map (OSM), Select2, Mailwizz, Calendarwiz, DataTables, Fabric.JS, SOAP API, PHPRETS, RETS/MLS Listing, Real Estate IDX, Thrivecart, Directus, Twilio Segment, Optimonk, VWO (A/B Testing), Sentry, Leantime, Google Analytics 4 (GA4), Google Tag Manager (GTM), Google Scholar, Google Calendar, FullCalendar, Latex, CodeCogs, BookingKoala, OsTicket, ConvertKit, etc. I am involved in developing many projects from scratch for some company and government. I also have experience on Banking and Insurance project like mutual fund web application by using classic ASP. I also created CBT (Computer-based testing) simulator similar with NCEES CBT for Civil Engineering FE and PE exams. I am a hard worker, fast, self taught and highly motivated.

Full Stack Developer specializing in .NET Core, React, and CMS solutions (Umbraco & Sitefinity) I help businesses build scalable, high-performance web applications from robust backend APIs to modern, responsive frontends. With 8+ years of experience working on enterprise-level projects, I’ve delivered solutions for international clients across the UK and US. 💼 What I can do for you: ✔ Build secure and scalable REST APIs using ASP.NET Core ✔ Develop modern, fast UI using React.js ✔ Customize and develop CMS solutions (Umbraco & Sitefinity) ✔ Fix bugs, improve performance, and refactor existing code ✔ Deploy and manage applications on Azure ✔ Convert Figma / PDF designs into responsive web apps 🚀 My recent work includes: ✔ CMS-based enterprise websites (Sitefinity & Umbraco) ✔ API development and third-party integrations ✔ Frontend development with React for dynamic applications 💡 Why clients choose me: ✔ Clean, maintainable, production-ready code ✔ Strong debugging and problem-solving skills ✔ Clear communication and reliable delivery If you need a developer who can understand your requirements and deliver quality work on time, let’s connect. 📩 Send me a message to discuss your project.

I am Parminder a passionate developer who lives and breathes Microsoft technologies and related frameworks. Coding isn't just a job for me; it's a genuine love and lifelong pursuit. I am always eager to take on new challenges and push the boundaries of what I can build. My areas of expertise include: Microsoft Technologies: ASP.NET, MVC, WinForms, WPF, Entity Framework, DDEX, Dapper, Spotify Front-End: AngularJS, React, HTML5, CSS3, Bootstrap 3, JavaScript, jQuery CMS & E-Commerce Platforms: NopCommerce, Umbraco, DNN, WordPress Mobile Development: Xamarin, Kotlin Cloud & Backend: Azure, AWS, Node.js Databases: MySQL, MongoDB, SQLite Other Technologies: Laravel, PHP, Spotify API integration, HIPAA I take pride in delivering clean, efficient, and scalable solutions. I work tirelessly to ensure complete satisfaction for every client. My approach is simple: quality work, open communication, and a results-driven mindset. I believe every project is a new challenge, and every challenge is a step toward success. Let’s build something great together! Cheers, Parminder Singh

Modern .NET applications need more than just code - they need structure, scalability, and long-term reliability. Bringing 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 of experience working with 𝐂#, 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞, 𝐚𝐧𝐝 𝐦𝐨𝐝𝐞𝐫𝐧 .𝐍𝐄𝐓 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 I develop scalable systems across enterprise applications, CMS platforms, and eCommerce solutions. My focus is on creating structured, maintainable codebases that support long-term growth rather than short-term fixes. I have hands-on experience with CMS platforms including 𝐃𝐍𝐍 (𝐃𝐨𝐭𝐍𝐞𝐭𝐍𝐮𝐤𝐞), 𝐔𝐦𝐛𝐫𝐚𝐜𝐨, 𝐒𝐢𝐭𝐞𝐟𝐢𝐧𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐎𝐫𝐜𝐡𝐚𝐫𝐝, where I handle custom development, module creation, integrations, and performance improvements. On the eCommerce side, I work extensively with 𝐍𝐨𝐩𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 - customizing workflows, improving performance, and building tailored features based on business needs. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊: ⦁ 𝐁𝐀𝐂𝐊𝐄𝐍𝐃- C#, ASP.NET Core, .NET Core, .NET 8, ASP.NET MVC, Web API, Entity Framework, LINQ, Microservices Architecture, SignalR, gRPC, Clean Architecture, Domain-Driven Design (DDD), CQRS ⦁ 𝐂𝐌𝐒 & 𝐄𝐂𝐎𝐌𝐌𝐄𝐑𝐂𝐄 - DNN (DotNetNuke), Umbraco CMS, Sitefinity CMS, Orchard CMS, NopCommerce, Custom CMS Development, Headless CMS, CMS Migration & Optimization ⦁ 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄- SQL Server, PostgreSQL, MySQL, MongoDB, Redis, CosmosDB, Database Design, Query Optimization, Indexing, Stored Procedures ⦁ 𝐂𝐋𝐎𝐔𝐃 & 𝐃𝐄𝐕𝐎𝐏𝐒 - Microsoft Azure, Azure App Services, Azure Functions, Azure DevOps, AWS (EC2, S3, Lambda, RDS), Docker, Kubernetes, CI/CD Pipelines, GitHub Actions, Infrastructure as Code (IaC), Linux ⦁ 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 & 𝐒𝐘𝐒𝐓𝐄𝐌 𝐃𝐄𝐒𝐈𝐆𝐍 - RESTful APIs, GraphQL, Distributed Systems, Event-Driven Architecture, Scalable System Design, High Availability Systems ⦁ 𝐈𝐍𝐓𝐄𝐆𝐑𝐀𝐓𝐈𝐎𝐍𝐒 - Stripe, Twilio, SendGrid, Salesforce, DocuSign, Google APIs, Payment Gateways, SOAP APIs, REST APIs, Webhooks, Third-Party API Integrations ⦁ 𝐓𝐄𝐒𝐓𝐈𝐍𝐆 & 𝐐𝐔𝐀𝐋𝐈𝐓𝐘 - Unit Testing, Integration Testing, xUnit, NUnit, Test Automation, Debugging, Performance Profiling ⦁ 𝐀𝐈 & 𝐀𝐔𝐓𝐎𝐌𝐀𝐓𝐈𝐎𝐍 - Python, FastAPI, OpenAI API, Automation Workflows, Data Processing 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐄𝐋𝐈𝐕𝐄𝐑 ⦁ Full-stack .NET application development ⦁ CMS development and customization (DNN, Umbraco, Sitefinity, Orchard) ⦁ eCommerce solutions using NopCommerce ⦁ Scalable APIs and backend systems ⦁ Legacy system modernization to ASP.NET Core ⦁ Performance optimization and database tuning ⦁ Cloud-ready deployments and architecture ⦁ Debugging, stabilization, and ongoing improvements 𝐃𝐎𝐌𝐀𝐈𝐍𝐒 & 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐈𝐄𝐒 ⦁ Finance & FinTech ⦁ eCommerce & Retail ⦁ Healthcare & HealthTech ⦁ Education & eLearning ⦁ SaaS Platforms ⦁ Real Estate ⦁ Logistics & Supply Chain ⦁ Enterprise Business Applications ⦁ CRM & ERP Systems I focus on delivering solutions that are clean, efficient, and built to scale - so your system continues to perform as your business evolves. 𝐈𝐟 𝐲𝐨𝐮'𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚 .𝐍𝐄𝐓 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐬 𝐛𝐨𝐭𝐡 𝐂𝐌𝐒 𝐞𝐜𝐨𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐚𝐧𝐝 𝐜𝐮𝐬𝐭𝐨𝐦 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐈’𝐦 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐭𝐨 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞.