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$19/hr
100%
Job Success
$100K+ earned
Available now
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I help startups and businesses build scalable SaaS platforms, enterprise applications, and full-stack web solutions using C#, ASP.NET Core, React, Next.js, and modern cloud-ready architectures.
I focus on building production-ready systems that are secure, maintainable, and designed for long-term growth.
🧩 Core Expertise
I specialize in building and optimizing:
• SaaS applications and business platforms
• Full-stack web applications using ASP.NET Core and React
• Backend systems with C# and .NET
• REST API development and third-party integrations
• Authentication and authorization systems (JWT, OAuth, Role-Based Access Control)
• Database design and optimization
• Enterprise application development
• Admin dashboards and internal business tools
• Performance optimization and scalable architecture
• Modern frontend development with React and Next.js
⚙️ Tech Stack
Backend: C#, .NET, ASP.NET Core, Entity Framework Core, REST APIs
Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS
Database: SQL Server, PostgreSQL, MySQL
Cloud & DevOps: Docker, Azure, AWS (basic), CI/CD
Other: Authentication Systems, API Integration, Clean Architecture, Microservices
🚀 What I Deliver
• Scalable SaaS and business applications
• Secure and maintainable ASP.NET Core backends
• Modern React and Next.js frontends
• Production-ready REST APIs
• Authentication and authorization systems
• Database architectures optimized for performance and growth
• Clean, maintainable, and well-documented code
🤖 AI-Enhanced Development Workflow
I leverage modern AI-assisted development tools to improve development speed, implementation quality, and delivery efficiency. This allows projects to move faster while maintaining strong engineering standards, clean architecture, and long-term maintainability.
💡 Development Approach
I don't just write code; I build systems that:
• Scale with growing businesses
• Support real-world business processes
• Prioritize security, performance, and maintainability
• Minimize technical debt from the beginning
• Remain easy to extend and operate over time
🎯 Ideal Clients
I work best with:
• SaaS founders building scalable products
• Businesses developing internal platforms and business applications
• Companies modernizing legacy systems with .NET technologies
• Teams looking for a Full-Stack .NET Developer with React expertise
• Startups needing both backend and frontend ownership
Why clients keep working with me
– Honest time estimates.
– Strong ownership and accountability.
– Clear communication throughout the project.
– Focus on long-term success, not just task completion.
If you're building a SaaS platform, business application, or full-stack web product and need someone who can handle both ASP.NET Core backend development and modern React/Next.js frontend implementation, I'd be happy to help.
C# Developer, .NET Developer, ASP.NET Core Developer, Full Stack Developer, React Developer, Next.js Developer, TypeScript Developer, ASP.NET Developer, Backend Developer, Frontend Developer, REST API Development, Entity Framework Core, SQL Server, PostgreSQL, SaaS Development, Business Applications, Authentication Systems, Enterprise Software Development, Scalable Web Applications
Alireza B.
has worked
.
United Arab Emirates
$45/hr
100%
Job Success
$800K+ earned
Available now
Offers consultations
Start of list.
End of list.
𝙄 𝙗𝙪𝙞𝙡𝙩 𝙎𝙖𝙖𝙎 𝙥𝙡𝙖𝙩𝙛𝙤𝙧𝙢𝙨 𝙩𝙝𝙖𝙩 𝙛𝙪𝙣𝙙𝙧𝙖𝙞𝙨𝙚𝙙 $𝟭𝘽+, 𝙧𝙚𝙖𝙘𝙝𝙚𝙙 𝟰𝟱𝟬,𝟬𝟬𝟬+ 𝙪𝙨𝙚𝙧𝙨, 𝙖𝙣𝙙 𝙨𝙝𝙞𝙥𝙥𝙚𝙙 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨 𝙤𝙣 𝙩𝙝𝙚 𝙄𝙣𝙘. 𝟱𝟬𝟬𝟬®. 𝙁𝙤𝙧 𝟭𝟴 𝙮𝙚𝙖𝙧𝙨, 𝙄'𝙫𝙚 𝙙𝙚𝙡𝙞𝙫𝙚𝙧𝙚𝙙 𝙥𝙧𝙤𝙟𝙚𝙘𝙩𝙨 𝙛𝙧𝙤𝙢 𝙈𝙑𝙋 𝙩𝙤 𝙨𝙘𝙖𝙡𝙖𝙗𝙡𝙚 𝙨𝙮𝙨𝙩𝙚𝙢𝙨. 𝙈𝙮 𝙜𝙤𝙖𝙡: 𝙨𝙝𝙞𝙥 𝙧𝙚𝙡𝙞𝙖𝙗𝙡𝙚 𝙥𝙧𝙤𝙟𝙚𝙘𝙩𝙨 𝙛𝙖𝙨𝙩, 𝙖𝙣𝙙 𝙨𝙪𝙥𝙥𝙤𝙧𝙩 𝙮𝙤𝙪 𝙛𝙧𝙤𝙢 𝙞𝙙𝙚𝙖 𝙩𝙤 𝙞𝙣-𝙝𝙤𝙪𝙨𝙚 𝙩𝙚𝙖𝙢.
I am not just a developer, but I act as your tech partner, and I know that founders need not just their tasks done, but guidance on what will be best for their project in their situation.
Also, I stick to what we agree on, and my payment model is always transparent from start to finish, which is important for both sides.
I will help you plan, architect, and ship scalable MVP and SaaS products so you can start your business, and your users will be happy using it.
Whether you’re starting from a prototype or stuck scaling, I will provide a clear foundation to launch and grow with support from my team, AEX Soft.
𝙒𝙝𝙖𝙩 𝙄'𝙫𝙚 𝙨𝙝𝙞𝙥𝙥𝙚𝙙:
• RallyUp (Nonprofit Fundraising SaaS) - $1B+ processed, 40K req/sec peak, 130K+ users - trusted by American Red Cross, Nike & Make-A-Wish. Built the Claude-powered AI content generator
• Boostlingo (Interpretation Services SaaS) - 17,000+ interpreters coordinated daily across hospitals, courts, and law firms in the US. HIPAA-compliant and SOC 2 Type II compliant.
• CMOS / ClearMechanic (Automotive SaaS CRM) - 300x growth, 100K+ users, adopted by BMW, Jaguar, and General Motors across 8 countries
𝙃𝙚𝙧𝙚’𝙨 𝙝𝙤𝙬 𝙄 𝙘𝙖𝙣 𝙝𝙚𝙡𝙥:
𝟭. SaaS & Web App Development: I build MVPs and scale SaaS platforms using .NET, React, Next.js, C#, Python/FastAPI, PostgreSQL/MSSQL.
𝟮. Mobile App Development: I utilize React Native, Flutter, and .NET MAUI for cross-platform development, Swift for native iOS, and reuse your APIs across mobile and web platforms.
𝟯. Backend & APIs: .NET/C#, Python/FastAPI, REST/GraphQL, Entity Framework, PostgreSQL, MSSQL, MongoDB, Supabase, Firebase, WebRTC when real-time is required.
𝟰. Frontend Engineering: I use React UI and React/Next.js for dashboards and portals, TypeScript, Vite, Three.js, and Blazor when needed.
𝟱. Payments & Integrations: I integrate Stripe for subscriptions and SaaS billing, and also work with PayPal, HubSpot, ActiveCampaign, Microsoft Dynamics 365, Twilio, WhatsApp, Shopify, WooCommerce, Zapier, ChatGPT/OpenAI.
𝟲. Cloud & DevOps: AWS and Azure, Vercel, CI/CD, monitoring, automate builds and rollouts, keep uptime high, and incidents low.
𝟳. Performance & Maintenance: I can find slow database queries and fix them, add the right indexes, cache frequent requests (e.g., Redis) to cut load times, and ship upgrades without downtime.
𝟴. Product Partnership: I conduct research, create documentation, QA processes, plan roadmaps, provide long-term support, and grow your team as the product scales.
𝟵. Core Stack: .NET + React/Next.js for product builds, Python/FastAPI when it fits.
𝟭𝟬. AI tools: I actively use Claude Code and Cursor for development. Also, I work with Grok, GPT models/OpenAI, and Lovable/Base44/Replit/Anything/v0.
𝙄 𝙬𝙤𝙧𝙠 𝙗𝙚𝙨𝙩 𝙬𝙞𝙩𝙝:
🔹 Startups moving from MVP to product-market fit
🔹 Product teams building or scaling a SaaS platform
🔹 Businesses that want to automate their processes
🔹 FinTech, Automotive, Crowdfunding, Inventory, Events, Food, and other niches
𝙏𝙤𝙤𝙡𝙨 𝙄 𝙪𝙨𝙚:
🔹Backend & Cloud: .NET, C#, Python, Node.js, FastAPI, ASPNET, MSSQL, PostgreSQL, MongoDB, MySQL, AWS, Azure, Supabase, Firebase, Entity Framework Core
🔹Frontend & Mobile: React, JavaScript/TypeScript, Next.js, Three.js, Vite, Blazor, Shadcn, Zod, React Native, Flutter, .NET MAUI, Swift, Xamarin
🔹Integrations: Stripe, PayPal, HubSpot, ActiveCampaign, Microsoft Dynamics 365, Twilio, Shopify, WooCommerce, Zapier, ChatGPT/OpenAI/Gemini
🔹Delivery: Slack, Jira, Azure DevOps, GitHub, CI/CD
With over $800K+ in Upwork earnings, 100% JSS, and 5-star client feedback, I work with serious teams and founders who want high-quality, a clear scope, and predictable delivery.
If you need to build an MVP, improve an existing SaaS product, or add AI features without wasting months on the wrong architecture, invite me to your job posting (click the "Invite to job" button at the top right of my profile) and let's go through it!
𝙄 𝙖𝙢 𝙖𝙫𝙖𝙞𝙡𝙖𝙗𝙡𝙚, 𝙡𝙚𝙩’𝙨 𝙘𝙝𝙖𝙩!
Alexey S.
has worked
.
Associated with
AEX Soft
$1M+
earned
$25/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
End of list.
If you have a business idea and you want to convert it into a mobile application, I would like to help you. I have 12+ years of experience in mobile app development. Expert in Swift, SwiftUI, Objective-C and Flutter.
Please check the client's feedback:
"It was a pleasure to work with Shrejash! He demonstrated his expertise in iOS; showed strong initiative on the project; excellent in communicating progress and presented any questions quickly so we could meet our deadline. He was always available when we needed him, and transparent when he had questions or issues. The app he built was produced exactly to the specifications – nothing missing, and each part thoroughly tested and polished. I would happily hire him again."
Following are some kinds of projects that I have successfully completed:-
- Product-based
- E-commerce
- Photo and Video
- GPS based apps
- Social networking apps
- Enterprise apps
- Medical apps
- Utility apps
My strong points:
- Strong written and verbal English
- Sound technical knowledge
- Great communication skills
- Top rated developer on Upwork
- Very good reviews by clients
$35/hr
100%
Job Success
$40K+ earned
Available now
Start of list.
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🟢 𝐀𝐕𝐀𝐈𝐋𝐀𝐁𝐋𝐄 NOW
👋 Hi there, I'm Artem! Need a developer to build a SaaS, MVP, or support a legacy system? I'm your full stack developer expert.
With 15+ years as a Senior .NET Full Stack Developer, I plan, architect, and deliver high-performance applications that scale. Through my agency CodeLuxSolution and direct Upwork engagements, I've completed 66+ projects globally, transforming outdated systems into modern, blazor-powered solutions that drive user adoption and slash operational costs.
═══════════════════════════════════════════════════════════
🏆 Why Our ASP.NET Core and .NET Developer Solutions Stand Out
⭐ 15+ years as a Senior .NET Full Stack Developer and Desktop Application specialist
⭐ 66+ custom projects delivered: 36 on Upwork, 30+ through enterprise contracts
⭐ Top Rated on Upwork with 100% Job Success Score
⭐ Leading projects for USA educational platforms serving 250k+ users after regulatory updates
⭐ Enterprise SaaS platforms in management and analytics spanning 20+ person teams
⭐ Desktop application migrations from WinForms to Blazor Server reducing deployment cycles to 1 second
⭐ ASP.NET WebForms to .NET Core migrations accelerating page load times by 100x (30s down to 0.5s)
⭐ High-load IoT systems optimized from 3 servers down to 1 server, cutting infrastructure costs 66%
⭐ ASP.NET MVC to RazorPages performance gains delivering 3x faster rendering
⭐ Blazor developer expertise enabling remote-first access and real-time data sync across 1000+ concurrent users
⭐ .NET Core microservices reducing deployment risk from multi-day windows to single-second updates
═══════════════════════════════════════════════════════════
🚀 Services | ASP.NET Core and .NET Developer Expertise
▶ Enterprise SaaS Architecture - Scalable, Management and Analytics Focused
► ASP.NET Core microservices for high-load systems processing thousands of IoT requests per second
► .NET Core backend serving 250k+ users on educational platforms with zero downtime
► Blazor Server and Blazor WASM applications enabling remote access and cross-user data synchronization
► SQL Server optimization and EF Core entity mapping for complex domain logic
► Developer-led database scaling strategies reducing server footprint by 66%
▶ Legacy System Modernization - WebForms to Modern .NET
► ASP.NET WebForms to .NET Core rewrites accelerating page loads from 30s to 0.5s
► WinForms Desktop Application refactoring into Blazor Server reducing update cycles to 1 second
► ASP.NET MVC to RazorPages migration delivering 3x performance improvement
► Eliminate version conflicts across 1000+ users with web-based Blazor deployment
► .NET Framework to .NET Core infrastructure consolidation cutting infrastructure needs from 3 servers to 1
▶ Custom Desktop Applications - WinForms and Windows Services
► WinForms application development for enterprise productivity tools
► Windows Services for background processing and system integration
► Desktop application architecture supporting offline and connected scenarios
▶ SaaS Platform Development - Full Stack from Concept to Scale
► ASP.NET Core APIs powering management and analytics SaaS dashboards
► Blazor components for real-time reporting and user collaboration
► .NET developer expertise in multi-tenant architecture and data isolation
► High-performance SaaS solutions serving thousands of concurrent users
▶ Specialized Modernization Services
► WinForms to Blazor Server conversion enabling work-from-anywhere deployment
► ASP.NET WebForms to .NET Core rewrites for systems handling high-load IoT data
► MetaTrader indicator development and NinjaTrader platform expertise
► Educational platform scaling from pilot to 250k+ user systems
► Fire safety and emergency management SaaS currently in development
═══════════════════════════════════════════════════════════
⚙️ Workflow, Tech-Stack and Extra Value
🔍 Discovery and Requirements Analysis
► Understanding legacy system pain points and defining success metrics for migration projects
► Competitive analysis and user experience mapping for SaaS platforms
🏗️ Architecture and Design
► Mapping WinForms components to Blazor Server architecture
► Designing ASP.NET Core microservices for SaaS platforms
► Planning infrastructure consolidation strategies for high-load systems
► .NET developer best practices for scalability and maintainability
💻 Development and Integration
► C# as primary language chosen over Python for development velocity and C++ for performance parity
► ASP.NET Core | Blazor Server | Blazor WASM | RazorPages | .NET Framework legacy
► HTML5 | CSS | JavaScript | SQL Server | EF Core with advanced querying
► WinForms for Desktop applications | Windows Services | API development
► Integration with existing enterprise systems and third-party APIs
⚡ Performance Optimization
► ASP.NET WebForms to .NET Core refactoring reducing page loa
$35/hr
100%
Job Success
$1M+ earned
Available now
Offers consultations
Start of list.
End of list.
I am a .NET full stack developer and software architect with 8+ years of experience building scalable web applications using ASP.NET Core, Angular, C#, TypeScript, Microsoft SQL Server, Azure, and modern cloud technologies. Across 35+ projects in defence, renewable energy, fintech, e-commerce, and enterprise SaaS development I have delivered systems that handle real production load, not just demo traffic.
What I build as a .NET full stack developer
My deepest work is in ASP.NET Core back-end development. I spent years as the lead .NET full stack developer on a platform managing thousands of wind and solar energy installations globally, processing massive volumes of real-time data, building microservices on .NET Core and Azure, and reducing critical downtime incidents by over 40% through improved monitoring and analytics. On another project I built a Loan Origination System in ASP.NET Core that automated the entire loan lifecycle from lead capture to loan issuance, integrating with HubSpot, external CRMs, and RESTful APIs on Microsoft Azure. The client went from manual processing to a fully automated fintech pipeline handling 550+ active applications, cutting processing time by 60%.
ASP.NET developer work across enterprise and defence
Some of my most complex work as an ASP.NET developer has been in defence and industrial sectors. I modernized a legacy web platform for a company managing 36 high-uptime naval fleet assets, warships that cannot afford downtime. The ASP.NET MVC rebuild reduced manual reporting time by 70% and enabled real-time asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS development project built by a single developer who had left, no documentation, weekly outages, daily hotfixes. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and reduced unplanned incidents from weekly to zero within two months.
ASP.NET Zero and enterprise acceleration
ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate SaaS development on projects in pharma automation, workplace management software, and industrial IoT, cutting initial setup time by 3+ weeks and letting the team focus on actual business logic from day one. On average my clients ship their first production release 30% faster on ASP.NET Zero compared to building from scratch.
Full-stack web development across the whole system
As a .NET full stack developer I own the entire delivery, ASP.NET Core back-end, Angular or React front-end with clean web design, Microsoft SQL Server and PostgreSQL database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero and cut order processing time by 35%, integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I delivered a fleet management system in .NET Core and Angular handling 1,250+ assets and 845 active rentals simultaneously, with automated reporting that saved operations teams 10+ hours per week. On the front end I work with Angular, React, TypeScript, JavaScript, Next.js, HTML, CSS, Bootstrap, and RESTful API integration, connecting them cleanly to .NET back-ends without creating maintenance nightmares six months later.
C# and .NET developer engineering that goes deep
Back-end development across 8 years as a .NET developer means I have seen what breaks under real load. I cut a US e-commerce platform's page load time from 8 seconds to 2, directly contributing to a 2x increase in sales. I optimize Microsoft SQL Server and PostgreSQL queries, regularly reducing query execution times by 60-80%, design database schemas that support complex reporting, and build API integration layers connecting .NET systems to CRMs, ERPs, payment gateways, and third-party platforms. I work with Node.js for event-driven services, TypeScript to keep large codebases maintainable, and Python or PHP when projects need scripting layers alongside the core .NET stack. For web development infrastructure I use Microsoft Azure and Amazon Web Services, Docker containers, microservices architecture, and CI/CD pipelines that reduced deployment time by 50% for several enterprise clients.
Why clients come back
I have worked with clients in Germany, the USA, Australia, the UK, Norway, Denmark, and the Netherlands across renewable energy, defence, fintech, e-commerce, and industrial IoT. What stays the same: I ask the right questions before writing the first line of code, flag problems early, and deliver .NET full stack applications that work in production, not just in development. If you are scaling a SaaS product, modernizing a legacy system, or need a .NET full stack developer your team can build on, let us talk.
Associated with
Eastoner
$500K+
earned
$18/hr
93%
Job Success
$90K+ earned
Available now
Offers consultations
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If your .NET project is stalled or your cloud bill keeps climbing, you're in the right place. I'm a full-stack developer with 12+ years of experience building SaaS platforms, fintech systems, and enterprise applications using .NET, Angular, React, Azure, and modern cloud technologies.
$90K+ earned on Upwork, 100% Job Success, Top Rated Plus. I've migrated legacy .NET systems to modern architectures and cut infrastructure costs by up to 30% along the way.
What I build:
- ASP.NET Core web apps and REST APIs
- Angular, React.js, TypeScript, Next.js
- Blazor and Angular frontends
- AI features built into .NET apps using Azure OpenAI and Copilot
- SaaS platforms and enterprise dashboards
- Legacy modernization from .NET Framework to .NET Core
- DevOps pipelines on GitHub Actions, Azure DevOps, Docker
I use AI-assisted workflows (Claude Code, Cursor, agentic tooling) to debug faster and ship sooner, without cutting corners on code quality.
I work across fintech, SaaS, e-commerce, logistics, and healthcare. Send me your requirements and I'll suggest the cleanest technical approach.
Associated with
QServices IT Solutions
$1M+
earned
$45/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
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Hey 👋 I’m Anastasiia, a Senior Software Engineer specializing in cross-platform React Native app development for operations platforms, SaaS products, and real estate / field-service teams, from MVP to production-ready apps on iOS and Android.
I help teams turn product ideas into stable, scalable mobile systems that users actually rely on daily.
🚀 What I Build with React Native
Cross-platform mobile apps (iOS + Android) with a mobile-first UX
Offline-first workflows with reliable data sync
Push notifications (real-time updates, alerts, user engagement)
Payments & subscriptions (in-app purchases, Stripe, Apple/Google Pay)
Maps, geolocation & route-based features
BLE / device integrations when hardware is involved
Secure API integrations (often with .NET / REST / GraphQL backends)
Admin dashboards (web companion panels for operations teams)
🧠 How I Work
Discovery → clarify product goals, users, and edge cases
Architecture → define scalable mobile structure (state, data flow, API design)
Milestone delivery → iterative builds with clear scope per stage
Weekly demos → working builds you can test continuously
Store release → full App Store / Google Play preparation and deployment
💡 Why this approach works
You get a production-ready architecture early, not just UI screens
The app is designed to scale from MVP → full platform without rewrites
Mobile performance, reliability, and UX are treated as core requirements, not afterthoughts
You always know what’s being built and why, at every step
If you already have an app idea, a prototype, or even an existing codebase, share it with me. I’ll map out the fastest and cleanest path to get it into production.
Associated with
Aixence
$1M+
earned
$16/hr
100%
Job Success
$100K+ earned
Available now
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I am having experience of 7+ years in the development of .Net large-scale applications In .NET Core. I am also an expert in Blazor & MAUI. Already worked with .NET 8 and 9 and have good understanding in .NET 10.
I have worked with Fulltime NET Developer for both MVC and NET Core.
Here are some of my skills and qualities:
Posse’s strong knowledge of Technologies like .NET CORE, C#, ReactJS, NodeJS, Blazor, ADO.Net, MVC, Linq to SQL, Entity Data Model, .NET 8, Python, flask and Django
Databases: MSSQL, SQL Server
Azure: Azure AD, Azure DevOps, Azure Table, IaaS, PaaS, Containers, Storage, Azure Monitoring, Security, Azure SQL, AppService, Logic Apps, Functions, Azure API and other Serverless services
Management: Azure Service bus, Azure Event Hub, Azure Batch, Azure App Services, Docker, Kubernetes
Messaging Broker: RabbitMQ
Caching: Redis
Containerization: Azure Functions.
Authentication: OAuth, Microsoft Authentication
Front-end tools: HTML, Jquery, JavaScript, Bootstrap, XML,chronologies, and AJAX methodologies.
Monitoring: Application insights.
Project management tools: Jira, Basecamp, Trello, Asana
Scripting Languages: JavaScript
Hosting: AWS Azure
Other Tools: GIT, TFS, Bitbucket, Devops
Primary Skills (Core Stack):
- Full Stack Developer
- .NET Developer
- ASP.NET Core Developer
- C# Backend Developer
- React.js Developer
- Angular Developer
- Blazor Developer
- MAUI App Developer
- .NET MAUI Developer
- Web API Developer
- Entity Framework Core
- Razor Pages
- SignalR Developer
Frontend Technologies:
- JavaScript Developer
- TypeScript Developer
- HTML5 / CSS3 / SCSS
- Responsive Web Design
- Tailwind CSS
- Bootstrap
- React Hooks
- Angular Material
- RxJS
- Material UI (MUI)
Backend / Server-Side
- ASP.NET Core Web API
- RESTful API Development
- Microservices Architecture
- Clean Architecture
- Dependency Injection
- Middleware in .NET
- LINQ / EF Core
- SQL Server / PostgreSQL / MySQL
- IdentityServer / JWT Authentication
Version Control & Tools:
- Git / GitHub / GitLab / Bitbucket
- Azure DevOps Pipelines
- Jira / Trello / ClickUp
- Visual Studio 2022
- Postman / Swagger
- Figma to React/Angular
Testing & Quality:
- Unit Testing in .NET (xUnit, MSTest)
- Jest for React
- Cypress / Selenium
- Playwright
- Code Review & Refactoring
Cloud & DevOps:
- Azure Developer
- AWS Developer
- Azure App Services
- Azure Functions
- AWS Lambda
- CI/CD (GitHub Actions, Azure DevOps)
- Docker
- Kubernetes
- Softr
- Cloudflare
I am also Responsible for implementing security using OAuth within REST Api (WebAPI 2).
$20/hr
100%
Job Success
$100K+ earned
Offers consultations
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🏆 TOP RATED PLUS ★★★★★ Recommended Freelancer on Upwork
AI Senior .NET Developer with ✅ 15 years of experience, skilled in C#, .NET Framework, .NET Core, API Integration, and Microsoft Azure. Adept in Full Stack, Mobile, and Backend Development for comprehensive software solutions.
✔ Back-End Development: Expert in creating, supporting, and updating .NET projects; API creation and optimization; integrating AI solutions into .NET projects; and transitioning projects to Microsoft Azure cloud.
✔ Mobile App Development: Proficient in developing cross-platform mobile apps using MAUI and Xamarin.
✔ Full Stack Development: Skilled in building robust websites with ASP.NET MVC, ASP.NET Web API, Next.js, Angular, and React for a full-stack approach.
✔ Desktop Software Development: Experienced in Windows Desktop application development and support using WinForms, WPF, and Unity.
✔ Code Conversion: Skilled in converting code from C, Java, and Python to C#, optimizing for efficiency and maintainability.
As a senior developer, I bring deep expertise across diverse .NET applications, including CFO-level insights for technical strategy, ensuring alignment with business goals.
Associated with
NetAI Software OÜ | .NET Development AI & API Integrations
$100K+
earned
$35/hr
100%
Job Success
$300K+ earned
Available now
Offers consultations
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I build production-ready AI agents that automate conversations, workflows, and business operations.
From Voice AI Agents and AI SDRs to RAG-powered copilots and enterprise automation platforms, I help startups and businesses deploy AI solutions that save time, reduce operational costs, and improve productivity.
Unlike developers who only build prototypes, I focus on delivering AI systems that integrate seamlessly into existing products and workflows. Every solution is designed with scalability, security, and long-term maintainability in mind.
## What I Do
I specialize in building custom AI applications and intelligent automation systems that create measurable business value.
My expertise includes:
• AI Agents and Autonomous Workflows
• Voice AI Assistants and AI Receptionists
• AI SDRs and Lead Qualification Systems
• RAG (Retrieval Augmented Generation) Applications
• Enterprise AI Copilots and Internal Knowledge Bases
• AI Chatbots for Customer Support and Operations
• AI Workflow Automation and Business Process Optimization
• Custom AI SaaS Development
• LLM Integration into Existing Products
• Multi-Agent Systems and Tool-Calling Architectures
INDUSTRIES
I have experience building AI agents, automation systems, and custom software solutions for businesses across multiple industries, including healthcare and medical, SaaS and technology startups, financial services, legal and compliance, real estate, retail and e-commerce, logistics and transportation, manufacturing, marketing agencies, construction, and field service businesses.
My work has supported hospitals, clinics, insurance providers, CRM-driven sales teams, customer support organizations, and enterprise operations by automating repetitive tasks, improving decision-making, and integrating AI into existing business workflows.
Whether you're building an AI-powered product from scratch or looking to integrate intelligent automation into your current systems, I can design it.
## Healthcare AI Expertise
Alongside general AI development, I have extensive experience building healthcare AI solutions and production-grade medical automation platforms.
I have developed AI-powered medical scribes, EHR integrations, and intelligent documentation systems that help clinicians reduce administrative workload and spend more time with patients.
My healthcare expertise includes:
• Ambient Medical Scribes
• Real-Time Clinical Documentation
• FHIR and HL7 Integrations
• Healthcare AI Chatbots
• Medical Voice Transcription
• HIPAA-Compliant AI Solutions
• EHR and EMR Integrations
## Proven Results
One of my AI-powered medical scribe platforms is currently used across multiple hospitals and supports more than 1,000 clinicians.
The platform has helped achieve:
• 60% reduction in clinical documentation time
• More than 300,000 clinician hours reclaimed annually
• Thousands of hours of medical conversations processed every day
• HIPAA and GDPR compliant infrastructure from launch
• Production-scale deployment across multiple healthcare organizations
My approach is always focused on building AI that delivers measurable business outcomes instead of experimental demos.
## Technical Expertise
• OpenAI GPT
• Azure OpenAI
• Claude
• Gemini
• LangChain
• Prompt Engineering
• RAG Pipelines
• AI Search
• Fine-Tuned Models
### Voice AI
• Deepgram Speech-to-Text
• Real-Time Transcription
• Voice Activity Detection
• Medical Speech Processing
• AI Voice Assistants
• Conversational AI
### Integrations
• REST APIs
• FHIR APIs
• HL7 Standards
• Webhooks
• OAuth 2.0
• Microsoft Graph API
• CRM Integrations
### Security
• HIPAA Compliance
• GDPR Compliance
• Azure Key Vault
• End-to-End Encryption
## Why Clients Work With Me
I don't just build AI features—I build complete AI products that fit naturally into your business operations.
Whether you're launching a startup MVP, integrating AI into an existing platform, or automating internal workflows, I focus on creating reliable, production-ready systems that users actually adopt.
I prioritize clear communication, clean architecture, scalable code, and measurable ROI throughout every engagement.
## My Development Process
1. Understand your business goals and existing workflows.
2. Design an AI architecture tailored to your requirements.
3. Build a working prototype and validate the solution quickly.
4. Deploy a production-ready implementation with secure integrations.
5. Monitor performance, optimize continuously, and provide ongoing support.
## If You're Looking For
✔ AI Agents
✔ Voice AI Solutions
✔ AI Chatbots
✔ RAG Applications
✔ AI Copilots
✔ AI Workflow Automation
✔ LLM Integrations
✔ Healthcare AI
✔ Custom AI SaaS Development
✔ Enterprise AI Solutions
I'd be happy to discuss your project.
Send me a brief description of what you're building, your current technology stack, and the problem you're trying to solve, and I'll help you design an AI solution that delivers real business impact.
Associated with
Cloudgarner Solutions Pvt Ltd
$800K+
earned