Kamlesh Laxmandas L.
C#.NET, Stripe Payment & AI Engineer | Claude, OpenAI, C#, Azure
Senior software engineer with 20+ years building and maintaining production websites and enterprise applications — now bringing that same reliability to AI-powered solutions with Claude. I architected and have maintained a 100+ website enterprise platform on Azure running on a single shared database for 9+ years — handling multi-tenant architecture, performance at scale, and zero-downtime maintenance. That's the kind of stability I bring to every project. My core stack: ASP.NET / .NET Core, C#, MVC, Web API, WCF, SQL Server, Azure, Telerik Sitefinity CMS, Vue.js, Stripe payments and AngularJS. On the AI side, I integrate LLMs (Claude, OpenAI/GPT), build AI agents and chatbots, RAG pipelines, prompt engineering, and workflow automation directly into .NET and web applications — so businesses get AI that actually works inside their existing systems. Proven Upwork track record: 50+ projects, 1,950+ hours, 4.99-star rating. I deliver clean, maintainable code, communicate clearly, and hit deadlines. What I can build for you: - AI chatbots & virtual assistants (Claude / GPT) integrated into your website or app - Custom API integrations (QuickBooks, Adobe eSign, SendGrid, OAuth, Google Calendar, Stripe) - Enterprise .NET apps, multi-tenant platforms, and CMS builds (Sitefinity, WordPress) - Responsive, multilingual websites with modern front-ends (Vue.js, Angular) Let's talk about how I can help — I reply fast and I'm easy to work with. --- # 2) TECHNICAL EXPERTISE AI / LLM Engineering - LLM integration: Claude (Anthropic API), OpenAI / GPT - AI agents, chatbots, and virtual assistants - RAG (Retrieval-Augmented Generation), vector search, embeddings - Prompt engineering & AI workflow automation - AI features embedded into .NET / Web API / Vue apps .NET Development — 20+ years - ASP.NET, .NET Core, C#, MVC, Web API, WCF, Payment Gateways like Stripe, paypal etc. Front-End - Vue.js (Components, Vuex, Vue Router, Axios, Dropzone, Lazy-Loaded Modules) - AngularJS, jQuery, Bootstrap, responsive & multilingual UI Database — 20+ years - SQL Server (design, optimization, multi-tenant / single-DB architecture) Cloud & CMS - Microsoft Azure (enterprise, 100+ site platform, 9+ yrs in production) - Telerik Sitefinity CMS, WordPress Integrations - QuickBooks, Adobe eSign, SendGrid API, OAuth, Google Calendar, Crystal Reports --- # 3) SKILL TAGS Claude / Anthropic API · OpenAI / GPT · AI Chatbot Development · RAG · Prompt Engineering · AI Automation · C# / .NET Core · ASP.NET MVC · Web API · Azure · SQL Server · Vue.js · Angular · Sitefinity CMS · QuickBooks Integration · SendGrid · OAuth · Adobe eSign --- # 4) INDUSTRY EXPERIENCE Healthcare · Automotive · Insurance · E-Commerce · Education · CMS Development · Enterprise SaaS · Automation