Hire the Best Umbraco Developers in Warsaw, PL

- Over 12 years of software development experience in various-sized projects; - Strong experience in designing and developing OOP solutions using .NET platform; - Solid experience in Sitecore CMS v6.5 - 9 - Great experience in business domain and functional requirements analysis, building appropriate architectural solutions; - Strong experience in web-client technologies such as HTML, XML, JS, CSS; - Good experience in system integration with .NET based Web Services; - Experience in “spaghetti” code refactoring and business logic performance optimization; - Experience in existing software support and maintenance; - Technology domination was achieved in ASP.NET, Sitecore, ASP.NET MVC, MSSQL Server.

Hello, Im a developer with 15 years of working experience. I have been working for companies from Russia, USA, Canada, Australia, Philippines. Have created applications for desktop, mobile and web. Main specialization - .NET stack (WPF, ASP.NET, Avalonia, MAUI), but also have experience in other areas. Have bachelor degree in applied math and computer science. Have rich expirience of using Selenium for automatization work with websites or data crawling. Main skills: Back-end: Asp.Net MVC, basic knowledge of NodeJS. Desktop: WPF, Avalonia. Mobile: MAUI, Xamarin. Front-end: Angular, Typescript, JQuery, AngularJS, Bootstrap, Chrome extensions Testing: Selenium, NUnit, Moq Infrastructure: Teamcity, Octopus, Azure Devops, gRPC, Git, SVN, JIRA Have worked with different DB: mostly MS SQL, but also MySQL, SQLite, Postgres. Have experience using ORM (EF Core, NHibernate) and directly accessing DB (Dapper). Could work both in team and as a separate developer. I have good learning ability - if I don't know something, usually it doesn't take much time to understand it. I have good skills in understanding code written by other developers, know how to write unit tests. I'm working with AI-tools: Claude code, Gemini, QWEN code.

🔥 Send me your idea — and I’ll give you a free initial consultation with practical thoughts, possible solutions, and a rough time and cost estimate. Legacy systems draining budget, slowing delivery, and blocking growth? At OSKI Solutions, we help companies modernize legacy applications and build scalable cloud-ready products with our 3x delivery strategy: experienced engineers + AI-assisted coding + disciplined execution. That means you get more than just developers. You get a team that can move significantly faster on implementation, reduce repetitive work through AI-assisted workflows, and still keep architecture, maintainability, and business priorities under control. Most of our engineers are from Ukraine, and we’ve built a delivery model that combines strong technical talent with modern AI tools to help clients ship faster without sacrificing code quality. Over the past 20+ years, I’ve worked as a senior engineer, architect, and ex-CTO, helping startups, SMBs, and enterprise clients rebuild outdated systems into secure, scalable, future-ready platforms. We work hands-on with .NET, Node.js, React, and modern cloud infrastructure to turn brittle systems into products that are easier to maintain, extend, and grow. What we do best Backend Development .NET Core, ASP.NET MVC, C#, Entity Framework Node.js, Express, REST APIs, GraphQL APIs Microservices, event-driven systems, business-critical backend logic Frontend Development React, Next.js, TypeScript, Redux Angular, Vue.js, SPA and PWA development Responsive interfaces, Tailwind, Material UI Legacy Modernization Legacy .NET and custom business platform modernization Monolith to modular/cloud migration Performance, maintainability, and technical debt reduction CMS & Business Platforms Umbraco CMS, Umbraco Cloud, migrations, custom development ERP-related systems and workflow platforms Internal tools, client portals, dashboards, admin systems Cloud & DevOps Azure, AWS, Google Cloud Docker, Kubernetes, CI/CD pipelines GitHub Actions, GitLab CI, deployment automation Databases SQL Server, PostgreSQL, MySQL MongoDB, Redis, caching and query optimization API Integrations & SaaS Stripe, PayPal, Twilio, SendGrid Slack, Shopify, Zoom, QuickBooks, Google Maps SaaS integrations, workflow automation, external service connectivity Why clients choose OSKI Solutions 3x delivery strategy: senior engineers + AI-assisted coding + structured execution 20+ years of experience modernizing complex systems CTO-level thinking focused on business outcomes, not just tickets Full-cycle delivery from architecture to deployment Lean, practical approach that keeps MVPs and modernization efforts within scope Clear communication with weekly demos, tracked hours, and transparent reporting Selected results One Motion Technologies — designed and built ERP system from scratch TutorPro — helped scale a SaaS platform, supporting 3x adoption growth in 2 years Umbraco platforms — delivered 15+ CMS and business platforms, including cloud migrations and integrations What our 3x approach means in practice We use AI to accelerate coding, prototyping, refactoring, and repetitive engineering tasks — but not to replace engineering judgment. The result is: faster delivery, cleaner implementation, better budget efficiency, and a stronger technical foundation for future scaling. 💬 Send me a message, and I’ll review your project, suggest the best approach, and give you a realistic next-step plan.