Andrei S.

C# .NET developer with a wide range of expertise. Over 15 years of enterprise development experience specializing in creating chatbots and all relevant infrastructure. I care about my clients. I will think not only about tasks done and done in time but also advise you on best practices, think about possible issues, recommend related technologies and strategies. I will care about time and money, can advise on prioritizing backlog tasks so quality will not lose. To make sure that this is not just pretty marketing words, please check reviews in my portfolio. Last five years mostly developing various chatbots and voice assistants, but I will be glad to help you with a wide range of tasks. ChatBots: 5+ years of experience in creating various chatbots, dozen happy clients on Upwork - MSFT botbuilder framework v3, v4 - Channel-independent bots as well as bots with channel-specific commands (for Facebook and Slаck, for example) - AI/NLP: Luis.ai, MS qnamaker.ai, Dialogflow.com, wit.ai Backend: - DotNet Core 2, 3 , Dot Net 6 - 6 years - Rest services \ Web API \ Odata \ WCF - 8 years - Chats on SignalR - Bus: Azure bus service / blob queue - Databases: MS SQL, MySQL – 9 years - Data access and ORM: Entity Framework \ EF Core \ Linq 2 SQL CE \ Devexpress XPO - Multi-tier modular solution architecture design - 6 years - Tons of 3rd party APIs connectivity services: Google, Amazon, Azure, Rackspace, Salesforce, Twilio, etc Blockchain - 3 months of experience - Ethereum - .Net Nethereum library - Smart contracts in Solidity - Etherscan APIs, all related DevOps works - ICOs Frontend: - Windows desktop development (C#, WPF) 4 years - Mobile platforms (WinPhone, Xamarin.Forms) 5 years - UX Design – 5 years - Angular, React - basic level Cloud: - MS Azure (portal, SDK, web apps, computing, databases) - APIs: Rackspace, Google and Gsuite, Amazon, Twilio, Facebook, Asana, MS Cognitive Services, etc Extra: - Have some interest and skills in IoT (Raspberry pi3, Win10 IoT) Have experience in project management, was tech lead and team lead in few projects. I love non-trivial challenging tasks where you need to think out of the box, love to do research and development work.