Hello, ๐ฏ I am a Professional AI-Native Full-Stack developer with over a 6 years of experience designing and deploying scalable enterprise solutionsf from the scratch. My journey is rooted in transforming complex business requirements into high-performance, AI-driven applications. Having successfully worked on large development teams through critical digital modernizations including custom SaaS platforms, AI-Native Automation systems, and Telehealth infrastructure - I bridge the gap between legacy reliability and modern AI-native velocity.
๐ My Technical Fluency
===========================================================================
โ Frontend: Angular, React, Angular Core, Angular 2+, Angular Universal, NGRX, Next, Remix
โ Backend: ASP.NET Core, C#, ASP.NET, .NET Web API, Entity Framework, SignalR, TypeScript,
โ Database: SQL Server, PostgreSQL, Redis, MongoDB, Supabase, AWS
โ Cloud & DevOps: Microsoft Azure (Certified), Docker, Kubernetes, CI/CD pipelines, GitHub Actions.
โ AI-Native & Vibe Coding Tools: Cursor, Claude, GitHub Copilot, Windsurf, Replit Agent, and custom LLM orchestration.
โ Testing: xUnit, NUnit, Playwright, Jest, Cypress.
๐ What I Am Born to Deliver
===========================================================================
๐ Systems designed for long-term maintainability, not just quick fixes.
๐ Translating ambiguous business goals into precise, actionable technical specifications.
๐ Delivering consistent, high-quality milestones through AI-accelerated workflows.
๐ Identifying bottlenecks and security vulnerabilities before they impact production.
๐ Maintaining clear, proactive communication that keeps stakeholders informed and confident.
๐ Building systems that handle growth from MVP to enterprise-grade traffic.
๐ Ensuring technology serves the specific functional needs of your unique business model.
๐ My Priorities for Every Project
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๐ Ensuring absolute reliability and security of your user information.
๐ Aggressive reduction of latency to ensure a seamless end-user experience.
๐ Prioritizing readability and modularity to reduce future technical debt.
๐ Aligning every interface component with intuitive user behavior patterns.
๐ Maintaining comprehensive, living documentation for seamless knowledge transfer.
๐ Architecting infrastructure to optimize cloud resource utilization and reduce overhead.
๐ Implementing industry-standard security protocols across every layer of the stack.
๐ Industries I Serve
===========================================================================
๐ Solar Energy & Renewables
๐ Manufacturing & Industrial Processing
๐ Healthcare & Telehealth Infrastructure
๐ E-commerce & Retail Giants
๐ Legal Technology & Services
๐ Architecture & Engineering Agencies
๐ Financial Services & SaaS Startups
๐ Education Technology (EdTech)
๐ Enterprise CRM & Resource Planning
๐ค My Strategies to Cut Development Time
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My development philosophy leverages an AI-native stack to accelerate the entire software lifecycle. I utilize Cursor and Claude to generate boilerplate, refactor complex modules, and automate unit test generation, which allows me to focus on architectural judgment rather than syntax. For backend management and documentation, I employ automated context-mapping tools that ensure all team members stay aligned without constant overhead. By integrating these systems into a unified workflow, I consistently reduce time-to-market by 50-70% while maintaining enterprise-grade quality.
๐ I am currently accepting new partnerships for high-impact projects.
"HIRE ME" or "INVITE ME" to your job post to discuss how we can accelerate your roadmap with AI-native engineering.
Thanks & Regards,
Kuldip S. ๐
ASP.NET
ASP.NET Core
ASP.NET MVC
ASP.NET Web API
C#
.NET Framework
.NET Core
Angular
Full-Stack Development
SaaS Development
Microsoft Azure SQL Database
ASP.NET Ajax
React
SQL
API Integration
Blazor
Microservice
NoSQL Database
TypeScript
Angular Material
Rinki S.
Surat, India
$20/hr
5.0
43 jobs
AI features that work in production. Faster MVPs. Clean handoff you can maintain.
I'm Rinki Singh, a senior full stack engineer with 16 years shipping web apps and B2B SaaS. I help founders and product teams deliver AIโpowered products on a clear plan you can track, with code you own.
RAG over private data without surprises. I build retrieval over PDFs. Over Notion or Confluence. Over Slack exports and CRM logs. LangChain and OpenAI where it fits, with vector stores like Pinecone. Weaviate or Redis if that suits the workload. The focus is grounded answers, prompt evaluation you can review, and latency that feels instant.
Product features I ship: inโapp chat for customers or agents. Document automation that extracts, validates, then routes. Task copilots wired to your systems through secure APIs. I handle auth and rate limits. Prompt and version control. Offline fallbacks so features survive traffic spikes, not just demos.
Full stack buildouts on AWS. React with TypeScript on the frontend. Python with FastAPI for services. REST by default, GraphQL only if it pays off. PostgreSQL for transactional data. Redis for caching and queues. Containers with Docker and Kubernetes. CI/CD in place. Tracing, canary or blue green deploys, instant rollback. Clean Git history and a visible Jira board.
Recent outcomes: cut documentโtoโinsight time from 45 minutes to 12 seconds for a logistics firm. Scaled a SaaS dashboard from 500 to 50k DAU with zero downtime through a Postgres redesign plus Redis caching. Built a legalโtech copilot that removed 94% of manual entries in 4 weeks.
What I can help with
- RAG over your docs and apps, with eval and monitoring
- Inโapp chat, document processing flows, task copilots tied to APIs
- New MVPs or feature rebuilds with React and FastAPI
- Backend APIs, PostgreSQL design, Redis caching and queues
How I work
- Short discovery and scope, then a fit check
- Within one week, a working prototype or a detailed API spec
- Milestones with weekly demos and a Jira board. Written updates every week
- Code reviews, tests, logging and tracing. Clear handover docs at the end
I work during US mornings and afternoons, Eastern or Pacific. Also European afternoons. Agreed onโcall for urgent needs. Fast start available within 3 to 5 business days.)
ASP.NET
Node.js
webpack
ExpressJS
Git
React
Angular
Redux
Redux Saga
Microsoft SQL Server Administration
Ramesh K.
Chandigarh, India
$16/hr
5.0
99 jobs
About Me
Iโm a Full Stack Web Developer with 18+ years of experience building, maintaining, and modernizing websites and web applications across ASP.NET, C#, .net CORE,RAZOR, and Squarespace platforms.
I specialize in end-to-end development, bug fixing, legacy system upgrades, and cross-platform integrations โ helping clients streamline their digital presence and boost performance without downtime.
Clients appreciate my ability to bridge technical backend expertise with modern front-end design. Whether youโre running a classic ASP application that needs modernization or a Squarespace site that needs migration or DNS repair โ Iโve got you covered.
๐ง Technical Expertise
๐น Microsoft .NET Technologies
-ASP.NET Core, MVC, Web Forms (ASPX), Blazor, and Classic ASP
-VB.NET and C# development with ADO.NET and Entity Framework
-API Development and Integration (REST, JSON, XML)
-Payment Gateway Integration: Stripe, PayPal, PayPal Commerce API , Clover API, Authorize.NET
-SQL Server database design, stored procedures, and performance tuning
-Application troubleshooting and performance optimization
๐น Web Platforms & CMS
-Squarespace (7.0 / 7.1): design, content setup, migration, and DNS/domain linking
-Wix, Webflow, Unbounce, Instapage, Mailchimp landing pages
-Domain setup and DNS configuration (GoDaddy, Google Domains, Bluehost, etc.)
-Migration between hosting providers: Azure, AWS, GoDaddy, WinHost
-SSL setup, redirects, and deployment troubleshooting
๐น Maintenance & Bug Fixes
Fix site errors, broken pages, or integration issues
Upgrade older .NET frameworks and refactor legacy code
Migrate Classic ASP or VB.NET projects to modern C#
Handle downtime recovery, configuration fixes, and data issues
Google Search Console error corrections and SEO fixes
๐น Integrations & Tools
Email Marketing: Mailchimp, Klaviyo, HubSpot, Facebook Pixel
Booking & Scheduling: Calendly, Squareup, GetTimely, Acuity Scheduling
Reporting: Crystal Reports, ABCpdf
Responsive layouts with Bootstrap framework
โ๏ธ What I Deliver
โ Fast & Reliable Fixes for Urgent Issues
โ Clean, Maintainable Code with Documentation
โ Regular Updates & Transparent Communication
โ 100% Satisfaction Guarantee
โ On-Time Delivery Every Time
๐ Why Clients Hire Me
*Deep experience with legacy-to-modern migrations
*Skilled in both front-end design and backend development
*Trusted by long-term Upwork clients for maintenance, upgrades, and support
*Excellent communicator who ensures clients always understand progress
๐ฌ Letโs Work Together
Need someone who can diagnose issues quickly, modernize your application, or redesign your website without disrupting your business?
Iโm available for both short-term fixes and long-term ongoing support.
Letโs connect and get your project running smoothly again!
ASP.NET
ASP.NET Core
.NET Framework
Squarespace
Web Development
ASP
Ecommerce Website
Payment Gateway Integration
Website Migration
Website Maintenance
Website Redesign
Front-End Development
Acuity Scheduling
Wix
DNS
Rakesh K.
Yamunanagar, India
$25/hr
4.9
185 jobs
20+ years experienced as Full Stack Senior .NET Developer specializing in SaaS application development, enterprise software architecture, backend engineering, and scalable cloud solutions. With years of practical experience, I build secure, high-performance web platforms using .NET, ASP.NET Core, Azure, SQL Server, Classic ASP and JavaScript frameworks, helping businesses launch reliable digital products faster.
๐ Backend Expertise
โ .NET Framework, ASP.NET Core, C#, Classic ASP
โ Scalable REST API Development, Backend Integration
โ Microservices, Distributed Systems
โ Secure Authentication & Authorization using JWT, OAuth
โ Role-Based Access Control, Identity Management
โ Clean Architecture
๐ Frontend Expertise
โ .NET MAUI, Avalonia UI, Blazor, Razor Pages
โ Vanilla JavaScript Expert
โ ReactJS, NextJS, AngularJS
โ Legacy JQuery
โ Theme Integration
๐ Database Expertise
โ Database Architecture
โ SQL Server Performance Tuning
โ MSSQL, MySQL, PostgreSQL
โ Azure SQL, MongoDB, ElasticSearch
โ Query Optimization and Data Modeling
๐ Domain Expertise
โ Healthcare Application Development
โ SEO Platforms and Marketing Tools
โ Cybersecurity Software Solutions
โ E-Commerce Platforms
โ SaaS Products
โ๏ธ Cloud Expertise
โ Microsoft Azure, AWS, Google Cloud Infrastructure
โ Docker, DevOps, CI/CD Pipelines, and Release Automation
โ Microsoft Azure Services
โ Application Performance Optimization
โ Monitoring, Logging, and Reliability Engineering
๐ผ Services I Provide
โ Custom SaaS Product Development from MVP to Production Release
โ Enterprise Web Application Development with Secure and Scalable Architecture
โ REST API Development, Third-Party Integrations, and Backend Modernization
โ Modern Frontend Interfaces with Clean UX and Responsive Design
โ Cloud Hosting, Infrastructure Optimization, and Deployment Automation
โ Ongoing Product Maintenance, Feature Expansion, and Technical Support
๐ Why Clients Choose Me
โ Years of Real-World Software Development Experience
โ Strong Technical Depth with Business-Focused Solution Design
โ Clean, Maintainable, and Future-Proof Code Architecture
โ Clear Communication, Fast Response, and Reliable Collaboration
โ Consistent On-Time Delivery with High Quality Standards
โ Long-Term Technical Partnership for Product Growth and Stability
From solution design and development to cloud deployment and long-term maintenance, I can take full responsibility for delivering scalable, production-ready software solutions.
Senior .NET Developer Upwork
Full-Stack .NET Developer Upwork
ASP.NET Core Developer Upwork
ASP.NET MVC Developer Upwork
C# Developer Upwork
.NET Core Developer Upwork
.NET Backend Developer Upwork
.NET API Developer Upwork
REST API Developer Upwork
Microservices Developer Upwork
Enterprise Application Developer Upwork
SaaS Application Developer Upwork
Cloud Application Developer Upwork
Azure .NET Developer Upwork
SQL Server Developer Upwork
Database Architecture Specialist Upwork
Performance Optimization Specialist Upwork
Software Maintenance & Support Upwork
Application Migration & Upgrade Services Upwork
Third-Party Integration Specialist Upwork
Skill Keywords
ASP.NET Core
.NET Framework
C#
.NET Core
MVC
Web API
Classic ASP
Entity Framework Core
SQL Server
Azure SQL
Microservices
RESTful APIs
SignalR
Blazor
Azure
AWS
Docker
CI/CD Pipelines
Agile Development
Responsive Web Design
Frontend Development
Backend Development
Database Management
Scalable Architecture
Cloud Deployment
Integration Keywords
Amazon SP API Integration
Burp Suite Integration
Stripe Payment Gateway Integration
Third-Party API Integration
ASP.NET
ASP.NET MVC
C#
WordPress
PHP
ASP
Intuit QuickBooks
PayPal Integration
Stripe
Authorize.Net
Ecommerce Website Development
Square API
Xero
Learning Management System
Custom Content Management System
Vandana S.
Udaipur, India
$25/hr
5.0
14 jobs
Need an AI-capable SaaS or internal tool shipped without drama? I build production web apps fast and keep them easy to extend. I'm Vandana Sharma, a Senior Full-Stack AI Engineer with 15+ years in software and 7,000+ Upwork hours. Clients bring me in to own the build from scope to launch, with consistent 5 star outcomes.
I deliver full products end to end. React and TypeScript on the front. Python REST APIs on the back. Clean architecture, tests, and clear patterns that future teammates can pick up without a learning wall.
For AI features, I ship LLM chat, RAG over docs, copilots, and document intelligence. LangChain with OpenAI where it fits. Retrieval is traced with logs, prompt history, and error capture, so you can see what happened and fix issues fast. Data stays isolated per tenant. Sensitive fields are kept out of prompts by design.
Infra and release flow are steady from day one. AWS with Docker and Kubernetes. CI/CD with staging checks and quick rollback plans. PostgreSQL for core transactions. MongoDB for flexible content.
What I can help with:
- SaaS MVPs and internal tools, from sketch to first users
- RAG chat over manuals, PDFs, and wikis using LangChain plus OpenAI
- Copilot features inside existing apps
- React and TypeScript UIs that stay maintainable and tested
- Python REST APIs on AWS with PostgreSQL or MongoDB
- Migrations, refactors, and tough production bugs
How I work:
- Short discovery, clear scope, and milestones
- Prototype or API spec in 48 to 72 hours
- Weekly demos, no surprises
- CI/CD, staging, and smoke tests before release
- Clean Git history with small PRs and reviews
- Handover docs with runbooks. Short Loom walk-through if helpful.
I'm hands-on and responsive, with overlap across US and UK hours. If you need a senior who can design, build, and ship, let's talk. I can start soon and move fast without breaking the future.
ASP.NET
React
Next.js
NestJS
Node.js
TypeScript
ExpressJS
GraphQL
Amazon Web Services
MongoDB
Redux
Microsoft Azure
Mocha Pro
Jest
.NET Core
Raj G.
Ahmedabad, India
$10/hr
4.2
2 jobs
I'm a .NET Developer with 3+ years of experience. I also work as a Sr. Software Developer where I learned practical skills in developing Web API for clients. I recently completed Angular Course from Udemy, which has given me the latest skills and knowledge in the Web Development industry.
I am skilled in a range of programming languages and platforms, including HTML, CSS, Javascript, jQuery, Bootstrap, Angular, .NET Framework, .Net MVC, .NET Core, .NET Web API, EF, EF Core, Dapper, LINQ, C#, SQL, SSMS and VCS like Git and SVN. I have worked on websites for different industries, such as pharmaceuticals, hospitals, and e-commerce.
I enjoy working with other web developers to make websites that match the client's brand and business objectives. I am committed to keeping up with the latest industry trends and best practices, and I attend professional web development courses to improve my skills.
if you are looking for a web developer with skills and experience, please feel free to get in touch with me.
ASP.NET MVC
ASP.NET Web API
C#
HTML5
JavaScript
Bootstrap
.NET Core
SQL
Microsoft Azure
RESTful API
jQuery
Microsoft SQL Server
Entity Framework
QuickBooks Online API
Xero
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