Hire the Best .NET Core Developers in Kyiv, UA

I am an AI developer and senior .NET engineer. I help companies build practical AI-powered products, RAG systems, chatbots, AI assistants, document search, and AI workflows that work with real business data. A strong background in .NET, backend systems, SaaS platforms, Blazor, Azure, databases, and production-ready architecture helps me build AI features as stable parts of real software products. My focus is on making the solution useful, reliable, and easy to maintain. I have worked with systems in finance, grocery, and other business domains, with attention to clean architecture, good performance, stable backend, and code that other developers can support and extend later. 🤖 AI Engineering - AI-powered applications and business automation - RAG systems / Retrieval-Augmented Generation - AI assistants and knowledge-base chatbots - AI agents and multi-step AI workflows - LLM integration and orchestration - OpenAI API, Semantic Kernel - Vector databases, including Qdrant - Document processing and semantic search - Prompt engineering and context management - Integration of AI features into existing .NET applications 🌐 Backend & Architecture - .NET Core / .NET Framework - High-load systems and distributed architecture - Microsoft Orleans - REST APIs and scalable SaaS platforms - Event-driven and service-oriented architecture - Performance optimization - Legacy system modernization 🎨 Frontend - Blazor - Angular - SPA development - HTML, CSS, TypeScript 🚀 Cloud & Data - Azure Cloud - Azure App Services - Azure Storage - SQL Server, PostgreSQL, Cosmos DB - Entity Framework, Dapper - Database design for business and AI-powered applications 📱 Mobile - .NET MAUI - Mobile application development - Contribution-level experience with the .NET MAUI ecosystem 🗄️ DevOps - Azure DevOps - CI/CD pipelines - Git - Deployment automation 📈 Experience & Results - Built AI-powered features, RAG systems, and assistants connected to real business data - Integrated LLMs with databases, APIs, documents, and internal knowledge bases - Built and scaled systems in finance and grocery domains used by thousands of users - Delivered full-stack solutions including backend, web, mobile, and AI features - Designed systems capable of handling real production traffic - Led development teams and mentored other engineers - Contributed to the .NET MAUI ecosystem - Migrated legacy systems from .NET Framework to modern .NET architecture - Improved performance, stability, and maintainability of existing applications 🤝 Let's connect! If you need an AI developer who can also build reliable .NET software behind the AI features, feel free to reach out and let’s discuss your project.

Hi! I’m a .NET developer focused on building and deploying backend applications. I work with: - C# / .NET (Web API, backend logic) - GitHub (repositories, workflows, CI/CD) - Deployment (Docker, cloud platforms, automation) I can help you: - Build REST APIs using .NET - Fix bugs in existing C# projects - Set up GitHub workflows (CI/CD) - Deploy your application (one-click deploy setups, containers, etc.) I focus on writing clean, maintainable code and making sure your app actually runs in production — not just locally.

[Last profile update: 13 Feb 2023] Welcome! ✅ I can help: ➜ Your business to grow via DEV support; ➜ To bring your whole idea, or new features of your existing product to market faster without major problems; ➜To make the DEV processes in your company faster and more cost-effective by building an appropriate App Development flow ✅ I provide the following Services: • Tasks related to Cloud Migration, and Cloud Development using Azure. • Microservice architecture implementation. • .Net Core development • ASP.NET Web API (RESTful) • Asp.Net MVC • Azure Services • Docker, Kubernetes • Highload systems • GitHub / CI / CD / Azure DevOps ✅ Qualifications include 9+ years of software development experience; ✅ Azure Developer Associate Also, I am leading a Dev company CodeFormation CodeFormation is a software development company that helps you at any stage of the product software development cycle: from R&D and building MVP from scratch to scaling, UX analyzing, and improvement. We produce effective, actual, and profitable software products in collaboration with the product owner and customer-side stakeholders. Our team is fully concentrated on the IT solutions, while the customer administrates the workflow and gets the opportunity to focus on the top-ranking tasks. Let`s discuss your request on a call during the next 1 hour.

Many companies run critical business processes using spreadsheets, disconnected tools, or legacy systems that are difficult to maintain. I help businesses replace those systems with custom role-based web applications such as CRM, ERP, and SaaS platforms that automate workflows, unify data, and scale with the company. As a Full Stack Developer and .NET Expert with 20+ years of uninterrupted commercial experience, I design and build business software that fits the real workflow of your company — not the limitations of generic tools. What usually happens before clients hire a Full Stack Developer like me • Legacy systems that are impossible to maintain or scale • Manual workflows consuming hours of team time every day • Off-the-shelf CRM or ERP tools that almost fit — but not quite • AI-generated or poorly structured codebases that need to be rebuilt properly • Developers who disappear mid-project or deliver code nobody can maintain As a Full Stack Developer and .NET Expert, I’ve solved these problems many times by rebuilding architecture, simplifying systems, and creating reliable software platforms companies can depend on. What I build as a Full Stack Developer • Custom CRM development for sales pipelines and customer management • ERP systems that unify operations, finance, and internal processes • SaaS platforms for startups and new digital products • Workflow automation to eliminate manual work • Admin panels and dashboards for internal teams • API integrations with external services • Legacy system modernization As a Full Stack Developer, I build complete systems using: C# • ASP.NET • SQL Server • PostgreSQL • REST APIs Cloud deployment on AWS and Azure What you get working with a .NET Expert • Clean and maintainable architecture • Secure backend and role-based access control • Audit trails and business-grade data security • Scalable systems designed for long-term growth Most importantly, you work directly with a Full Stack Developer who writes the code personally, manages deployment, and communicates clearly throughout the project. No vendor lock-in. White label. You fully own the code and infrastructure. If you need a custom CRM, ERP system, SaaS platform, or internal business tool, feel free to invite me to your project. I’m happy to discuss the architecture and help plan the right solution before development begins. Skills: .NET Full Stack, Web Developer, Software Architect, C#, ASP.NET, SQL Server, PostgreSQL, Frontend & Backend Development, Web development, Web developer, API integration, CRUD applications, Workflow automation, Admin dashboards, Reports & Analytics, Cloud deployment, Custom Web App, Low-Code / Rapid Application Development (.NET & Web), AI-Assisted Development Core Expertise & Technologies: CRM Development, ERP Development, Portal Development, Platform Development, System Development, Dashboard Development, Internal Tools Development, Database Development, CMS Development, Custom CRM, Custom Web Application, Web Application, Internal Tools, Business Process Automation, Integrations, Inventory/Accounting Software, MVP Development, Website Development, Fast Prototyping, Prototype Development, Rapid Application Development, From Scratch, Pilot, Initial, Early stage, Modernization, Custom Development, Not a Generic Solution, White label, No vendor lock-in, In house, Greenfield, Azure, AWS, Workflow Automation, Automation, API Integrations, Legacy, Migration, JSON API Integration, RESTful API Development, Excel Integration, Google Sheets Integration, C#/.NET, SQL, PostgreSQL, MS SQL, Security, Roles, User Roles, Notifications, Permissions, Validation, Pagination, Dashboard, Admin Panel, Administration, Admin Dashboard Builder, Web Forms, Notifications, HTML, CSS, JavaScript, B2B, B2C, Subscriptions, Stripe, Lovable, Frontend, Backend, AI, Artificial Intelligence, Authorization, Authentication, OAuth2, NoSQL, WordPress, MAUI, VB6, VBA, VB.NET, Mobile Development, Android, Algorithms, Data Structures, Engines, Copilot

I help SaaS and product companies modernize aging .NET applications — migrating legacy .NET Framework systems to .NET Core, rewriting outdated frontends with Angular, and fixing the bugs that have been piling up along the way — so your product stays secure, supported, and compliant instead of running on frameworks Microsoft no longer patches. I also build new features into existing .NET products and ship new web applications from scratch. If your app was built on .NET Framework 4.x or WebForms, you already know the problem: every month it gets harder to hire for, harder to patch, and harder to pass a security review. Customers ask about compliance. Auditors flag unsupported dependencies. Meanwhile, the team is afraid to touch the codebase because nobody's sure what will break. That's the work I do. A top-performing full-stack developer with 20+ years in Microsoft technologies, I own the full project lifecycle — analysis, design, development, deployment, maintenance — whether that means modernizing a legacy system, extending one that's working, or building something new from a blank repo. Pragmatic programming principles throughout: fast, secure, scalable software shipped without freezing new features for months. Recent wins: - Replaced a legacy e-commerce platform (.NET Framework 4.x / WebForms with DevExpress controls) with a ground-up ASP.NET Core rebuild — roughly 90% new code on both backend and frontend. Built a fast, responsive Angular UI (desktop + mobile), integrated Google Sign-In, Google Shopping product export, and ERP integration (product catalog pulled from the ERP, new orders pushed back). Also built an AI-powered tool that helps salespeople process purchase orders received by email/IM by matching free-form product requests against the catalog. - Modernized a legacy SaaS product built on .NET Framework — migrated vanilla JS to TypeScript with Webpack bundling, rewrote major jQuery components as Angular Elements, and built a new data-calculation module from scratch in Angular, integrated cleanly into the existing legacy site. - Remediated dozens of security vulnerabilities in a .NET Framework 4.x / WebForms application flagged by an independent security audit — minimal, surgical changes only, with zero regressions introduced. What I typically deliver: - Migration of ASP.NET Framework 4.x WebForms apps to ASP.NET Core - New features and modules built into existing .NET applications - New web applications and SaaS products built from scratch (ASP.NET Core + Angular) - Frontend rewrites from legacy JS / AngularJS / jQuery to modern Angular + TypeScript - Upgrades of outdated Angular apps (Angular 2–20) to the current Angular version - Bug fixes and stabilization of inherited .NET codebases - Integrations with HubSpot, Salesforce, Dynamics CRM, Microsoft Graph, Google Shopping / Merchant Center, AWS / Azure Core stack: C#, .NET Core, .NET Framework, Entity Framework, ADO.NET, ASP.NET MVC / Web API / WebForms, MS SQL, MySQL, Angular, TypeScript, HTML/CSS, Azure, AWS, Xamarin. If you're working on a .NET product — legacy or greenfield — send me the details. I'll tell you honestly what the work is and what it would take.

🧑‍💻 I build intelligent automation systems that eliminate manual work and connect your tools into one seamless workflow. With 8+ years as a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (C#, AWS, Azure, Microservices), I bring deep technical expertise to the no-code automation space. This means I don't just connect apps — I architect 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞, 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 with proper error handling, data validation, and monitoring that won't break when your business grows. 🚀 𝐖𝐡𝐚𝐭 𝐈 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐞 • 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 — chatbots with RAG (knowledge base AI), lead enrichment & scoring, voice agents, intelligent document processing • 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 — CRM pipelines, client onboarding, order processing, team notifications, approval flows • 𝐃𝐚𝐭𝐚 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬 — API integrations, webhook orchestration, data sync between platforms, ETL pipelines, web scraping • 𝐌𝐚𝐫𝐤𝐞𝐭𝐢𝐧𝐠 & 𝐂𝐨𝐧𝐭𝐞𝐧𝐭 — multi-platform content publishing, email sequences, lead nurturing, social media automation 🚛 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫 • AI lead generation & enrichment pipelines (n8n + CRM) • Customer support AI chatbots with knowledge base (RAG) • CRM sync & deal automation (HubSpot ↔ Asana ↔ Airtable) • E-commerce order & inventory automation (Shopify, WooCommerce) • AI document processing (invoices, contracts, receipts → structured data) • Content generation & multi-platform publishing pipelines • n8n deployment & maintenance (cloud or self-hosted, scalable & secure) 🎯 𝐊𝐞𝐲 𝐀𝐜𝐡𝐢𝐞𝐯𝐞𝐦𝐞𝐧𝐭𝐬 • Built AI lead pipeline that reduced lead processing from 𝟏𝟓 𝐦𝐢𝐧 𝐭𝐨 𝟑𝟎 𝐬𝐞𝐜 • Automated document processing handling 𝟓𝟎+ 𝐝𝐨𝐜𝐮𝐦𝐞𝐧𝐭𝐬/𝐝𝐚𝐲 with 95%+ accuracy • Designed CRM sync system eliminating 𝟏𝟎+ 𝐡𝐨𝐮𝐫𝐬/𝐰𝐞𝐞𝐤 of manual data entry • Deployed self-hosted n8n on VPS serving enterprise clients with 𝟗𝟗.𝟗% 𝐮𝐩𝐭𝐢𝐦𝐞 • Migrated FinTech microservice ecosystem, cutting deployment time by 𝟒𝟎% 🛠 𝐌𝐲 𝐓𝐨𝐨𝐥𝐤𝐢𝐭 • 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬: n8n (self-hosted & cloud), Make, Zapier, and others (OpenClaw, PaperClip) • 𝐀𝐈 & 𝐋𝐋𝐌𝐬: OpenAI GPT-4/5, Claude API, LangChain, RAG, AI Agents • 𝐂𝐑𝐌 & 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: HubSpot, Salesforce, Asana, Airtable, Notion • 𝐀𝐏𝐈𝐬 & 𝐂𝐨𝐝𝐞: REST, GraphQL, Webhooks, OAuth 2.0, JavaScript, Python • 𝐂𝐥𝐨𝐮𝐝 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞: AWS (Lambda, SQS, S3), Azure, Docker — for self-hosted n8n and scalable deployments • 𝐃𝐚𝐭𝐚: Google Sheets, PostgreSQL, Supabase, MongoDB, Redis ✅ 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 • Discovery call/mailing to understand your process and pain points • Workflow design with an architecture diagram before building • Clean, documented implementation with error handling • Testing, handoff walkthrough, and documentation • Post-delivery support to ensure everything runs smoothly if needed 💡 𝐖𝐡𝐲 𝐌𝐞 𝐯𝐬. 𝐎𝐭𝐡𝐞𝐫 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐅𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫𝐬 • I understand 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 — my workflows scale and don't break under load • I write 𝐜𝐮𝐬𝐭𝐨𝐦 𝐜𝐨𝐝𝐞 when no-code reaches its limits (JS/Python nodes in n8n, custom Make modules) • I build proper 𝐞𝐫𝐫𝐨𝐫 𝐡𝐚𝐧𝐝𝐥𝐢𝐧𝐠 — retry logic, dead-letter queues, monitoring alerts • 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐛𝐚𝐜𝐤𝐠𝐫𝐨𝐮𝐧𝐝 means I design systems, not just connect blocks • I focus on 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐨𝐮𝐭𝐜𝐨𝐦𝐞𝐬 — every automation I build has measurable ROI Whether you need to automate lead handling, sync your CRM, build AI-driven workflows, or deploy n8n for your team/business, I'll turn complex processes into simple, reliable systems. 🤝 Let's discuss your automation goals and build something that actually works.