Viacheslav T.

👋 I’m a Full-Stack Engineer with a strong backend background, working mainly with C#/.NET, Python and React/TypeScript 💳 FinTech & Payments I have production FinTech experience working on a high-load payment platform with real transaction flows and integrations with external payment providers. My work included payment-core functionality, provider integrations, transaction states, callbacks and payment back-office development. 🏢 SaaS & Full-Stack Development I also built a multi-tenant SaaS platform running in production with .NET on the backend, React on the frontend and SQL Server. I worked across the full stack, including APIs, business logic, database design, frontend integration and architecture decisions. 💼 Commercial .NET Experience Before that, I worked commercially as a .NET developer in outsourcing companies on several client and business applications. I worked with existing codebases, built new features, fixed production issues and, on some projects, took ownership of architecture and end-to-end implementation. 🛠️ Main Stack C# / .NET / ASP.NET Core Python / FastAPI React / TypeScript / Next.js SQL Server / PostgreSQL REST APIs / Third-party integrations Docker / CI/CD Multi-tenant SaaS / Payment systems / Production integrations ⚙️ How I Work I’m comfortable both building new functionality and joining an existing codebase, understanding the current architecture and business logic, and continuing development without unnecessary rewrites. 🤖 I use AI-assisted development tools such as Claude Code as part of my daily workflow, but I review all changes manually and keep ownership of the final implementation