Roman O.

Send your architecture for a free code review! I’m a Senior Full Stack Developer & Software Architect with 20+ years in custom software development. I use modern engineering strategies to build high-performance, enterprise-grade platforms. 🎯 What I bring to your brand as a Senior Full Stack Developer: ✔️ Over 20 years of commercial software engineering experience, leading .NET framework, C# development, and Node.js architectures for global enterprises. ✔️ Results-focused Full Stack Development: As a .NET Expert, I create scalable microservices architectures and API development plans that boost performance and handle high user concurrency. As a Software Architect, I ensure your custom software development is always ROI-driven and infinitely scalable. ✔️ Technical & Architecture Audit Mastery: As a Senior Full Stack Developer, I develop a detailed code audit, database audit, and technical architecture audit to map out your system structure. My cloud infrastructure expertise allows me to refine backend systems before scaling. I’ve delivered 150+ architecture audits and system performance reports, helping streamline software development workflows. ✔️ API Integration & Webhooks Expertise: As an API Specialist and backend developer, I prioritize REST APIs, GraphQL, and third-party integrations. My approach as a Software Architect focuses on secure authentication, OAuth2, and custom API architecture. ✔️ Frontend & Modern UI Solutions: As a Senior Full Stack Developer, I use React.js development and Vue.js optimization for high-performing user interfaces. As a .NET Expert, I handle Angular setups, UI component architecture, and frontend-to-backend integration to ensure your web application performs flawlessly. ✔️ Cloud Deployment & CI/CD Innovation: As an Azure developer and DevOps consultant, I use Docker containerization, Azure App Services, and Azure Functions to scale deployments. ✔️ Database & Performance Optimization: I am a database specialist and SQL Server developer. My technical data skills include PostgreSQL optimization, Entity Framework, and complex SQL queries. As a Software Architect, I ensure your database design is flawless using the best indexing and scaling strategies. ✔️ AI Integrations & Tooling: As an AI integration developer, I build C# and Python solutions for AI-driven services. My expertise includes pragmatic implementation of LLM APIs, OpenAI/Claude integrations, and utilizing the Model Context Protocol (MCP) to securely connect AI agents with backend systems and custom data sources without unnecessary over-engineering. 📊 My Achievements in Numbers: 🔶 Software Architect for a Global Enterprise (SaaS / B2B): ▪️ Improved API response times by 200% through technical code audit and query optimization. ▪️ Reduced cloud infrastructure costs by 50% via enhanced microservices architecture and Docker deployment. ▪️ Accelerated feature delivery by 30% using automated CI/CD pipelines and agile workflows. 🔶 Senior Full Stack Developer for a FinTech Platform: ▪️ Achieved 99.99% uptime through .NET migration and Node.js backend optimization. ▪️ Reduced database deadlocks by 100% with a technical database audit and SQL Server optimization. 🔶 API Specialist for an E-commerce Engine: ▪️ 2x checkout speed by redesigning the REST API and payment gateway integration (Stripe). ▪️ 3x faster user onboarding through architecture audit insights and Auth0 security implementation. Why should you hire me as your Senior Full Stack Developer and Software Architect? ▪️ 20+ years in software engineering, backend architecture, API development, and cloud infrastructure. ▪️ Senior Full Stack Developer in React.js, Vue.js, Angular, and modern JavaScript. ▪️ .NET Expert in C#, ASP.NET MVC, Web API, and .NET. ▪️ Delivered enterprise backend services and microservices architectures for B2B and SaaS platforms. ▪️ Node.js Specialist support for high-concurrency event-driven applications. ▪️ Database architecture specialist for SQL Server, PostgreSQL, and MySQL growth. ▪️ Expert in Azure DevOps, Docker containerization, and CI/CD pipelines. ▪️ Practical experience in AI integrations, delivering C# and Python solutions for AI-driven services, including LLMs and MCP. ▪️ Software Architect and CTO with a proven track record of zero-downtime, secure deployments. Specialized Development Services: 🔹 Architecture Audit: From database performance audit to technical code audit. 🔹 API Integration: From third-party API integrations to custom REST/GraphQL APIs. 🔹 Backend Development: From Node.js microservices to .NET Core enterprise systems. 🔹 Frontend & UI: React.js and Vue.js scalable applications. 🔹 Cloud & DevOps: Optimization for Azure App Services, Docker, and GitHub Actions. 🔹 AI Integrations: solutions for AI-driven services, LLM API endpoints, and MCP (Model Context Protocol) implementation. Looking for an experienced Senior Full Stack Developer and Software Architect? Let’s connect!