Leonid O.

🚀 Solution Architect | Cloud Architect | .NET Architect | Technical Lead | Senior Full Stack .NET Developer 💼 10+ years in software engineering and architecture 🏗️ Distributed Systems | Microservices | Enterprise Architecture ☁️ Azure & AWS Cloud Architecture ⚙️ C# / .NET | Angular | APIs | Databases | Integrations 🔁 DevOps | CI/CD | Kubernetes | Cloud-Native Solutions 👋 About Me Hi! I'm Leonid Oleksiuk, a Solution Architect, Cloud Architect, and Technical Lead with more than 10 years of software engineering experience. I help companies design, modernize, and scale complex software systems - from defining architecture and technology stack to designing APIs, integrations, cloud infrastructure, and deployment strategies. My hands-on .NET engineering background allows me to approach architecture pragmatically. I understand how architectural decisions affect implementation, maintainability, performance, infrastructure, security, and development teams. I specialize in scalable, maintainable, cloud-ready systems using .NET, Azure, AWS, distributed architectures, and modern DevOps practices. 🏗️ Architecture Expertise - Solution & Software Architecture - Cloud Architecture - Azure & AWS - Microservices & Distributed Systems - Modular Monolith Architecture - Event-Driven Architecture - API & Integration Architecture - Domain-Driven Design - Clean Architecture - High Availability & Scalability - Database Architecture - Authentication & Authorization - Legacy System Modernization - Cloud Migration - Architecture Reviews & Technical Audits - CI/CD & DevOps Architecture - Kubernetes & Containers 🔧 Technology Stack Backend: - C# - .NET / .NET Core / ASP.NET Core - ASP.NET Web API - Entity Framework / EF Core - Dapper - SignalR Frontend: - Angular - React - TypeScript - RxJS - NgRx/Redux Databases & Data: - MSSQL - PostgreSQL - MySQL - MongoDB - Redis - Elasticsearch - Azure Cosmos DB Cloud & DevOps: - Microsoft Azure - AWS - Kubernetes - Docker - Azure DevOps - GitHub Actions - GitLab CI/CD - Jenkins - AWS CodePipeline 👨‍💻 Technical Leadership I have experience leading engineering teams and making technical decisions across the full software development lifecycle. I can help with: - Defining architecture and technical strategy - Selecting technologies and infrastructure - Designing service boundaries and APIs - Reviewing architecture and source code - Mentoring developers - Planning modernization and cloud migration - Identifying technical risks and bottlenecks - Improving engineering and DevOps processes - Coordinating implementation across multiple teams 🏆 Why Work With Me - Architecture backed by hands-on engineering experience - Business-oriented technical decisions - Scalable and maintainable system design - Strong Azure, AWS, and .NET expertise - End-to-end perspective from application architecture to infrastructure and CI/CD - Experience working independently or leading development teams 🤝 How I Can Help - Designing a new SaaS or enterprise platform - Building a complex .NET solution - Moving an application to Azure or AWS - Migrating from a monolith to modular or distributed architecture - Introducing microservices - Designing integrations between systems - Improving scalability or performance - Reviewing an existing architecture - Reducing technical debt - Establishing CI/CD and DevOps practices - Looking for an experienced Technical Lead or Architect Let's discuss your system, current challenges, and business goals.