Vitaly V.

Software Architect .NET | AI - MCP LangGraph | HubSpot

25 years in .NET as a full stack C# developer and solution architect. ETL, high performant and resilient distributed systems are my primary fields of expertise. AI workflows - either Claude Code based or LangGraph with openweigth models (gemma4, qwen, deepseek, anything). Can go bare or can go Claude-boosted, no vibe coding. What I love to do: ▶ Design and build high load or close-to-RT application/platform from scratch ▶ Implement complex AI-heavy workflows via LangGraph and on premises or cloud LLMs ▶ Deploy diffusion model workflows to automate still images and video content generation ▶ Harness AI agents to cut implementation time 5x dedicating myself to architecture and problem solving ▶ Solve non-trivial performance tasks ▶ Debug, troubleshoot and refactor legacy projects ▶ Audit software solutions to spot potential scalability, performance, data consistency or operation problems. ▶ Integrate REST/Sockets APIs into your application, including crypto-parts (BTC, ETH, ERC-20 and others) My areas of expertise: ◉ C# NET full stack ◉ High load, distributed, close to RT systems architect ◉ Microsoft SQL Server ◉ External APIs of all sorts and complexity ◉ Cryptocurrencies essentials and integration ◉ HubSpot API (4+ years intensive usage in high load multi-tenant system) ◉ Clouds: AWS and Azure ◉ CI/CD: BitBucket, GitHub My background and skills: ★ 20+ years of experience in .NET software development ★ 5 years of software architecture design and implementation. ★ Highload backend solutions ★ 5 years of extensive experience in development team leading ★ Fluent written and spoken English ★ Computer science Bachelor degree in 2006 Career highlights through recent past: ★ Implemented a highly autonomous SaaS engine featuring complex analytical capabilities for Hubspot via MCP for Claude/ChatGPT. The fleet of servers and the app itself is operating 90% autonomously, and same comes for marketing ★ Reworked HubSpot-targeting product that allowed business operation growth from 80 clients to 1000+; turned another PoC into production ready software serving hundreds of customers by now ★ Mission critical accounting software for customer from scratch, 10+ years in use by now ★ Fully automated cryptocurrency trading engine ★ Refactored spaghetti-coded legacy system to bring it to a competitive state and allow for implementing state of the art AI-driven features ★ Mission critical backend data management system from scratch ★ High load optimization for Oracle-based national telecom reporting tool Technologies I prefer to deal with: ☑ C# net10/9/8/6 ☑ Claude Code via custom harness for daily use ☑ Python LangGraph + langfuse ☑ Blazor, AspNetCore, AspNet MVC ☑ Legacy C# all the way down to NET 1.1 and ASPNET Forms ☑ EntityFramework (EFCore) and Dapper ☑ CI/CD via GitHub or BitBucket or Azure DevOps ☑ WPF/UWP mvvm style ☑ JavaScript/jQuery ☑ Microsoft SQL Server, SSRS