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Sandeep P.
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Sandeep P.

Senior Backend Developer | ASP.NET Core | C# | MVC | Azure | Web APIs

I help SaaS founders and businesses build and scale high-performance .NET applications from MVP to production-ready systems used by real customers. With 10+ years of experience, I specialize in designing scalable backend systems, modern web applications, and enterprise-grade solutions across industries such as logistics, healthcare , insurance SaaS, construction, HR automation systems, and many more using ASP.NET Core, ABPIO, and cloud technologies. 𝐈 𝐭𝐲𝐩𝐢𝐜𝐚𝐥𝐥𝐲 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: ✔ Startups building SaaS, web, or AI-powered applications from scratch ✔ Businesses scaling or improving existing .NET systems and platforms ✔ Companies looking to integrate AI into their existing applications (automation, chat, smart workflows) ✔ Teams needing custom-built solutions tailored to specific business processes ✔ Founders turning ideas into production-ready applications (MVP → scale) 𝐖𝐡𝐚𝐭 𝐈’𝐯𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 → Built multi-tenant SaaS platforms, enterprise web applications, and custom .NET systems with ABP → Developed high-performance REST APIs and backend systems handling real-world production workloads → Designed and delivered full-stack web applications for business-critical use cases Improved application performance and reduced response times through optimization → Migrated legacy systems from .NET Framework to .NET Core for better scalability and maintainability → Integrated AI-powered features into SaaS and web applications 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 C#, .NET Core, ASP.NET Core, ASP.NET MVC ABPIO (Modular Architecture, Multi-Tenancy) REST APIs & Web API Development Microservices Architecture Authentication (JWT, OAuth, Identity) Clean Architecture, SOLID Principles 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 Blazor (WebAssembly & Server), Razor Pages Angular / React JavaScript, TypeScript 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 SQL Server, PostgreSQL, MySQL MongoDB, Cosmos DB, DynamoDB Entity Framework Core (EF Core) Query Optimization & Performance Tuning 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 Microsoft Azure, Google Cloud Platform Docker & Containerization CI/CD (Azure DevOps, GitHub Actions) Deployment, Monitoring & Performance Optimization 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 (𝐑𝐞𝐚𝐥-𝐖𝐨𝐫𝐥𝐝 𝐔𝐬𝐞 𝐂𝐚𝐬𝐞𝐬) ✔ Built an AI-powered HR system that analyzes resumes and matches candidates with job requirements, reducing manual screening effort ✔ Developed an AI-based EdTech platform with a virtual AI tutor/avatar for interactive learning and engagement ✔ Created an AI-powered inspection & compliance solution to identify issues, validate data, and ensure regulatory compliance using fine-tuned AI models ✔ Built AI chat systems to automate customer support and reduce response workload ✔ Automated workflows for data processing, summaries, and internal operations ✔ Integrated OpenAI and Claude APIs into ASP.NET Core applications 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐖𝐢𝐭𝐡 → SaaS Application Development (ABPIO / .NET Core) (Concept to MVP to Production) → Full-Stack Web Application Development → Enterprise .NET Application Development & Architecture → ASP.NET Core Web API & Integration → Microservices Development → Legacy System Modernization (.NET Framework → .NET Core) → Database Design & Optimization → Azure Cloud Deployment & DevOps Setup → AI Integration into Web & SaaS Applications → Ongoing Maintenance, Scaling & Feature Development 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ✔ Hands-on experience with real production systems ✔ Experience as a Technical Lead (architecture + code quality) ✔ Ability to work independently and take full ownership ✔ Strong focus on clean, scalable, and maintainable solutions ✔ Clear communication and reliable delivery ✔ Long-term collaboration mindset ⭐ 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: [ .NET Developer, ASP.NET Core Developer, C# Developer, Full Stack Developer, Azure Developer, SaaS Developer, SaaS Application Development, Multi-Tenant SaaS, ABP Framework, Web API Development, REST API Developer, Microservices Architecture, Enterprise Application Development, Scalable Web Applications, Backend Developer, AI Integration, OpenAI API Integration, Claude API Integration, AI Automation, Angular Developer, React Developer, Blazor WebAssembly, SQL Server, PostgreSQL, Entity Framework Core, Cloud Developer, Docker, CI/CD Pipelines, DevOps, Legacy System Migration, Startup MVP Development, Real-Time Data Systems] 𝐋𝐞𝐭’𝐬 𝐖𝐨𝐫𝐤 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫 𝐈𝐟 𝐲𝐨𝐮'𝐫𝐞 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐚 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐝𝐮𝐜𝐭, 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧, 𝐨𝐫 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐬𝐲𝐬𝐭𝐞𝐦 𝐮𝐬𝐢𝐧𝐠 .𝐍𝐄𝐓, 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐝𝐞𝐬𝐢𝐠𝐧, 𝐛𝐮𝐢𝐥𝐝, 𝐚𝐧𝐝 𝐬𝐜𝐚𝐥𝐞 𝐢𝐭 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭𝐥𝐲. 𝐅𝐞𝐞𝐥 𝐟𝐫𝐞𝐞 𝐭𝐨 𝐫𝐞𝐚𝐜𝐡 𝐨𝐮𝐭 𝐈’𝐦 𝐡𝐚𝐩𝐩𝐲 𝐭𝐨 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝 𝐲𝐨𝐮𝐫 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐚𝐧𝐝 𝐬𝐮𝐠𝐠𝐞𝐬𝐭 𝐭𝐡𝐞 𝐛𝐞𝐬𝐭 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡.

🇮🇳Ganganagar, India$25/hr100% JSS5.00 (7)Since May 2021
GlobeUpwork

Earnings and projects

MRR
$4.3k

Last 6 months ÷ 6

World#7,157 / 412k
🇮🇳Country#861 / 45.9k
Revenue, last 30 days
$5.2k

Last 6 months: $26k

World#5,207 / 412k
🇮🇳Country#563 / 45.9k
Total earnings
$147k

Billed in all: $167k

World#24,135 / 412k
🇮🇳Country#3,944 / 45.9k
Per project
$18k

$26k in the last 6 months

World#6,780 / 412k
🇮🇳Country#671 / 45.9k
Projects, last 6 months
1

Across 2 contracts

0% fixed100% hourly
World#128,096 / 412k
🇮🇳Country#14,379 / 45.9k
Projects in all
8

Across 10 contracts

0% fixed100% hourly
World#223,563 / 412k
🇮🇳Country#29,080 / 45.9k

Earnings, last 30 days

$167k+$5.2k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$160k$165k$170kOct 9Oct 24Nov 8

Skill rankings: Top 2% in MySQL

Ranked by MRR among everyone on Upwork with the skill.

  1. #17.NET Stack276 freelancers · 🇮🇳 #4Top 6%
  2. #38AI Platform816 freelancers · 🇮🇳 #14Top 5%
  3. #51ASP.NET Web API1,447 freelancers · 🇮🇳 #17Top 4%
  4. #53Entity Framework1,047 freelancers · 🇮🇳 #20Top 5%
  5. #100ASP.NET Core2,272 freelancers · 🇮🇳 #39Top 4%
  6. #101ASP.NET MVC2,619 freelancers · 🇮🇳 #44Top 4%
  7. #107ASP.NET2,819 freelancers · 🇮🇳 #33Top 4%
  8. #117Microsoft SQL Server2,759 freelancers · 🇮🇳 #35Top 4%