Hire the Best .NET Framework C# Engineers
in Israel

AI-focused Technical Leader and hands-on Engineer with 22+ years building products from zero to production. I architect and ship AI-powered SaaS, B2B/B2C platforms, and enterprise systems - writing code daily while leading teams and strategy. 📞 Invite me to your job for a FREE 15-minute consultation! 📞 Highlights: 🤝 56,000+ hours & 220+ jobs completed (with my Upwork agency), all with 5-star reviews 🤝 Top 1% of All Talent on Upwork & "Expert Vetted" Badge 🤝 $2M+ revenue generated on Upwork alone 🤝 18+ years of Senior Technology Executive management experience in roles such as CEO, CTO, VP R&D, Head of Engineering, Systems/Software/Cloud Architect, DevOps, PM, etc. Technical leadership and managing remote and on-site teams of up to 30 What I Do: I help companies build AI-first products - from initial architecture to production. Think of me as your remote, hands-on CTO and Lead Engineer: I design systems, write code, manage engineering teams, collaborate with designers on UX, and ship. My company builds large open-source platforms (ERP/CRM/HRM, Commerce, Work / Project Management), and I bring that same 0-to-1 product-building experience to every client engagement. Over the years, I've helped hundreds of companies, from startups to large international enterprises, and have conducted business in the US, Israel, Ukraine, and Bulgaria. Worked remotely with companies worldwide: US, UK, Norway, Ukraine, India, Australia, etc. Worked on multiple highly complex commercial projects, both in startup and enterprise environments, with small and large teams. I can work with the team or develop software independently from the ground (to production), keeping the software quality along the way extremely high! Rates: - Short-term / consulting: $180/hr - Long-term engagements: $120/hr Services: - AI strategy, architecture & implementation for existing and new products - Fractional CTO / technical leadership for startups and scale-ups - Product architecture, estimation & 0-to-1 builds - Code reviews, performance optimization & solving complex technical problems - Team mentoring and engineering process improvement (Agile/Lean) Short summary of software engineering expertise: ◾ AI Agents & Multi-Agent Systems (LangChain, CrewAI, AutoGen, custom orchestration) ◾ LLM Integration (OpenAI / ChatGPT, Anthropic / Claude, Gemini, local models) ◾ RAG Pipelines, Embeddings, Vector Search, AI Chatbots ◾ ML / Deep Learning (TensorFlow, PyTorch, Python) ◾ SaaS (B2B & B2C) / Multi-tenancy Architecture ◾ Cloud & DevOps: AWS, Azure, GCP, Docker, k8s, CI/CD, Serverless ◾ 15+ years with .NET / C# ◾ 10+ years with JavaScript / TypeScript ◾ 5+ years with Node.js / NestJS ◾ Python (AI/ML, Django, Serverless), Java, and more In technology, my focus spans AI-powered systems, Web, Mobile & Distributed Software: - AI & ML: LLM orchestration (OpenAI, Anthropic, Gemini), AI agents, RAG, vector databases, TensorFlow, PyTorch, prompt engineering, fine-tuning. - Backend: Node.js / NestJS, .NET / ASP.NET Core, Python, JS / TypeScript. - Frontend: React/ReactNative, Angular, Vue. - Data: PostgreSQL, MongoDB, MS SQL, MySQL, Kafka, RabbitMQ, ElasticSearch. - Cloud & DevOps: AWS, Azure, GCP, Docker, Kubernetes, Serverless, CI/CD. Some of the latest OSS projects include: - An Agentic Runtime that Autonomously Builds and Maintains Web Apps - Orchestration System for Autonomous AI Companies - AI-powered Open-Source ERP/CRM/HRM Platform - Work and Project Management Platform with AI features - Modern Commerce Platform (reactive server, mobile & web apps) Feel free to message me to get more details about my experience relevant to your specific project, I am always open to new opportunities! 📞 Reach out by inviting me to your project right now! 📞 Looking forward to working with you on amazing projects, - Ruslan

I have 10 years of experience in .NET technologies and front-end development. I'm a specialist in building complex enterprise-level solutions (like ERP systems or SaaS applications) based on SOLID principles and covered with unit tests. My back-end skills: - .NET Core, ASP.NET MVC, ASP.NET Web API 2.0, ASP.NET Web Forms, WCF - Entity Framework, MS SQL Server, Oracle, MySql, MongoDb, PostgreSQL - Unit testing and integration testing using SpecFlow, XUnit, nUnit - CI/CD using Git and Jenkins or Azure DevOps My front-end skills: - HTML, HTML5, CSS, CSS3, Sass, SCSS, LESS - JavaScript, jQuery, TypeScript, Kendo UI, React, KnockoutJS - Bootstrap 4 and 5 I prefer working on challenging long-term projects. I'm eager to learn new technologies and try new frameworks. If you need not just a developer but a professional who can make your project better structured and more stable, please feel free to contact me. Thank you for consideration, Elijah

I help startups, SaaS companies, and growing businesses build production-ready web applications, backend systems, automation workflows, API integrations, and AI-powered product features. I’m a Full Stack Developer with a strong backend-first mindset. I build scalable SaaS platforms, custom web applications, dashboards, admin panels, internal tools, APIs, databases, and automation systems designed for real business use not just demos. I can help you with: • Full-stack web application development • SaaS platform development • Backend architecture and API design • React and Next JS frontend development • Node JS, NestJS, TypeScript, Python, and FastAPI development • PostgreSQL and MongoDB database systems • Admin dashboards and internal tools • Third-party API integrations • Webhooks and data synchronization • Make workflow automation • n8n workflow automation • Base44 app building and integrations • AI assistants and AI-powered workflows • Business process automation • Debugging, refactoring, scaling, and modernization I work with both custom-code systems and automation platforms. That means I can build a complete SaaS application from scratch, improve an existing product, connect multiple tools through APIs, or create automated workflows using Make, n8n, Base44, webhooks, and backend services. On the AI side, I build practical AI features inside real products and workflows. This includes AI assistants, chat-based tools, internal copilots, knowledge-based systems, AI automations, and agent-style workflows connected to actual business processes. My focus is simple: build software that is useful, stable, maintainable, and aligned with your business goals. My core technologies include: Node JS, NestJS, TypeScript, React, Next JS, Python, FastAPI, PostgreSQL, MongoDB, c#, go, rust, Docker, AWS, REST APIs, Make, n8n, Base44, webhooks, automation systems, and AI / LLM integrations. Clients usually work with me when they need someone who can understand the full picture backend logic, frontend features, databases, integrations, automation, AI functionality, and long-term maintainability. What you can expect when working with me: • Clean, maintainable, production-ready code • Strong backend and full-stack engineering • Practical API and automation experience • Make, n8n, and Base44 workflow support • AI implementation focused on real use cases • Clear communication and structured execution • Problem-solving with both technical and business context • Reliable delivery with attention to stability and usability I can help you build a new platform, improve an existing system, add automation, integrate APIs, connect AI features, or solve technical problems inside your current product. Send me a message and I’ll be happy to discuss your project, your current technical situation, and the best next step.

20+ years of experience in the software development industry: C#,.NET CORE, SQL, Mongo, Kafka, AWS Experience in large scale enterprise application Experience in cloud development Experience in projects architecting and design Deep knowledge in algorithm design, OOP concepts, OOD, async/await-style programming, multithreading, design patterns and code analysis Proven experience in Microsoft.NET applications development Proven experience in following and implementing Software Development best practices (test driven development (TDD), S.O.L.I.D principles, etc.) Leveraging and implementing Agile development methodologies (Scrum-based) Experience in designing, developing and maintaining large SQL / NoSQL DBs

Hi, I'm a highly skilled and versatile software engineer with expertise in Python, C++, C#, and reverse engineering. With 10 years of experience in developing efficient, high-quality code, and analyzing software behavior through reverse engineering, I offer a unique blend of skills to solve complex technical challenges. Services Offered: 1. Python Development Full-stack development using Python (Flask, Django, etc.) Script automation, web scraping, and data processing. API integration and data manipulation. Writing Python-based tools for reverse engineering. 2. C++/C# Development Software development with C++ for high-performance applications. System programming, game development, and embedded systems. Optimization of existing C++ code for better performance. Development of desktop applications and games using C#. Software solutions for Windows platforms (WinForms, WPF, .NET). Integration with databases and external APIs. 3. Reverse Engineering & Malware Analysis Software Debugging: Understanding and modifying software behavior through techniques like disassembling, decompiling, and debugging. Malware Analysis: Deconstructing malicious code to understand its behavior, identify vulnerabilities, and suggest countermeasures. Cryptography & Protection Removal: Bypassing obfuscation techniques and software protections such as DRM, license verifications, and anti-tampering mechanisms. Security Audits & Penetration Testing: Analyzing software for security flaws and performing penetration testing to ensure vulnerability prevention. Technical Skills: Programming Languages: Python, C++, C#, JavaScript, Bash, go Frameworks & Libraries: Flask, Django, mern stack, FastApi, Qt, .NET Framework, Boost, PyQt Reverse Engineering Tools: IDA Pro, Ghidra, OllyDbg, WinDbg, x64dbg Operating Systems: Linux, Windows Security Tools: Burp Suite, Wireshark, Metasploit, Maltego Let’s Work Together! If you are looking for a reliable and knowledgeable developer who can handle challenging problems in Python, C++, C#, and reverse engineering, I am here to help you succeed.

Experienced senior backend software engineer, lastly working at Sepio Cyber (recently fired after some layoff rounds). Here at upwork I offer jobs in anything requiring C# coding, and/or the field of scraping, where I write programs that automatically extract web sites data. You determine the fields, and get an excel file with the results. If you are after lead generation, I scrape my results to extract contact info. I also offer my current job experience in prompt engineering and copilot agent and skills creation using Claude 4.5 to tackle different AI Engineering jobs.