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Dmitrij R.
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Dmitrij R.

Senior .NET Developer | ASP.NET Core | Angular | AI Integration

Senior .NET Backend Architect | ASP.NET Core | AI Integration I am a Senior .NET Engineer with 10+ years of experience designing and delivering scalable backend systems and complex distributed applications. My core strength is backend architecture and system design. I build production-ready ASP.NET Core systems that remain stable, maintainable, and extensible long after the initial release. I don’t just write code - I design systems that evolve. 🔹 What I Do On most projects, I take full ownership of backend development: • Design scalable system architecture from scratch • Build secure ASP.NET Core Web APIs • Implement clean domain-driven business logic • Structure projects using Clean Architecture and SOLID principles • Optimize SQL Server performance and data models • Modernize and refactor legacy .NET systems • Lead technical decisions and long-term architectural planning I focus on clarity, maintainability, and long-term scalability - not quick hacks. 🔹AI & Intelligent Systems Integration I integrate real AI capabilities into production products: • OpenAI API integrations • AI agents & automation workflows • RAG pipelines & vector databases • Semantic Kernel & tool orchestration • Embedding AI features into SaaS platforms AI is not a buzzword in my work - it’s a structured, production-ready implementation aligned with business goals. 🔹Core Technology Stack Backend & Architecture: • C# • .NET Core / .NET 6 / .NET 7 / .NET 8 • ASP.NET Core • Entity Framework Core • SQL Server • Microservices & distributed systems • Clean Architecture (DDD, SOLID) • Performance optimization • Legacy modernization Frontend (when required): • React • Angular • Blazor • JavaScript / TypeScript Primary specialization: backend architecture. 🔹What You Get Working With Me • Clear technical planning before development begins • Clean, maintainable C# code • Scalable REST APIs designed for growth • Structured backend architecture • Reliable AI integration • Transparent communication • Predictable delivery 🔹Best Fit Projects • Building scalable backend systems from scratch • Developing ASP.NET Core Web APIs • AI integration into existing products • SaaS platform architecture • Migrating legacy applications to .NET Core • Long-term product development partnerships If you are building a serious product and need a Senior .NET Backend Architect who can design robust systems and integrate modern AI capabilities - I’d be glad to contribute.

🇺🇦Zaporozhye, Ukraine$25/hr100% JSS5.00 (3)Since Jul 2018

Earnings and projects

MRR
$5.2k

Last 6 months ÷ 6

World#5,031 / 412k
🇺🇦Country#343 / 14.3k
Revenue, last 30 days
$5.3k

Last 6 months: $31k

World#5,098 / 412k
🇺🇦Country#345 / 14.3k
Total earnings
$300k

Billed in all: $312k

World#7,707 / 412k
🇺🇦Country#656 / 14.3k
Per project
$60k

$16k in the last 6 months

World#634 / 412k
🇺🇦Country#67 / 14.3k
Projects, last 6 months
2
0% fixed100% hourly
World#88,918 / 412k
🇺🇦Country#3,419 / 14.3k
Projects in all
5

Across 11 contracts

9% fixed91% hourly
World#266,042 / 412k
🇺🇦Country#10,266 / 14.3k

Earnings, last 30 days

$312k+$5.3k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$305k$310k$315kOct 8Oct 23Nov 7

Skill rankings: Top 2% in Unity

Ranked by MRR among everyone on Upwork with the skill.

  1. #8Distributed Computing107 freelancers · 🇺🇦 #2Top 7%
  2. #11Web API670 freelancers · 🇺🇦 #2Top 2%
  3. #26SQL Programming1,149 freelancers · 🇺🇦 #1Top 2%
  4. #27Blazor656 freelancers · 🇺🇦 #6Top 4%
  5. #31Entity Framework1,047 freelancers · 🇺🇦 #7Top 3%
  6. #34Performance Optimization1,100 freelancers · 🇺🇦 #8Top 3%
  7. #47Unity2,992 freelancers · 🇺🇦 #7Top 2%
  8. #56Software Architecture964 freelancers · 🇺🇦 #10Top 6%