Hire the Best .NET Core Developers
in Germany

Lets harness the power of your data with cutting-edge solutions. With a robust background in Data Engineering, Python Automation, and Web Scraping, I am now available to offer my high-impact services on Upwork. Having driven significant innovations in top multinational companies, I’m here to provide you with top-tier freelance expertise. Why Choose Me? 🔹 Proven Expertise: After working on the cutting edge technologies & projects, I am transitioning from technical role at IBM to offer my specialized skills on Upwork. My experience spans data engineering, scripting, and automation, ensuring your projects benefit from industry-leading practices. 🔹 Advanced Data Engineering: Expert in creating and optimizing data pipelines and data warehouses using IBM DataStage, AWS Redshift, and Databricks. My hands-on experience ensures your data systems are robust, scalable, and efficient. 🔹 Powerful Python Automation: Skilled in developing Python scripts for automation, data processing, and integration tasks. I excel at building automated workflows that save time and enhance efficiency. 🔹 Efficient Data Scraping: Proficient with tools like ParseHub, Scrapy, OctoParse, and Beautiful Soup for web scraping and data extraction. I turn complex, unstructured data into actionable insights that drive business decisions. 🔹 Cutting-Edge AI and ML: Experience in AI model development for autonomous vehicles, including road detection and decision-making algorithms. My work demonstrates a strong capability in applying machine learning techniques to real-world problems. 🔹 Impactful Data Visualization: Expertise in creating insightful dashboards and reports using Power BI. I translate complex data into clear, actionable visualizations to support your business decisions. My Core Services Include: ✅Data Engineering: Designing, developing, and managing data pipelines and warehouses. ✅Python Automation: Crafting scripts for automating tasks, data processing, and system integration. ✅Web Scraping: Extracting and analyzing web data to provide valuable business insights. ✅AI & Machine Learning: Developing and deploying models for advanced data analysis and automation. ✅Data Visualization: Building dynamic dashboards and reports to visualize data effectively. Let’s collaborate to leverage your data for strategic growth. Contact me to discuss how I can help streamline your data processes, enhance automation, and provide actionable insights.

I build custom C# / .NET software for businesses that need reliable desktop applications, internal tools, and practical workflow solutions. My main experience is in C# backend solutions for business software. I work with C#, WPF, MAUI, ASP.NET Core, Razor, MVC, MVVM, SQL, Entity Framework, and Web API, and I’m also interested in Blazor-based internal applications. I’m a good fit for projects involving internal tools, workflow systems, document generation, printing features, integrations, and software that supports day-to-day operations. I work well with MVP prototypes and milestone-based projects where the goal is to turn a business need into a practical working solution. I can take ownership of a project communicate clearly and make practical decisions to keep development moving. I can also help refine requirements as the project evolves. In many business applications, the best solution becomes clearer during implementation, and I’m comfortable helping shape that process while keeping the work structured and aligned with the client’s goals. I’m especially interested in .NET applications for internal platforms, admin tools, business automation, and AI-assisted workflow solutions where the technology supports a real business need. I usually prefer fixed-price or milestone-based projects when the scope is clearly defined, because it keeps the process transparent and predictable for both sides. If you need help building, improving, or supporting a .NET desktop application, internal business tool, or custom software solution, I’d be glad to discuss your project.

I help businesses turn ideas into well-designed, tested, and user-friendly digital products. With 10+ years of experience across product management, software delivery, UI/UX design, and graphic design, I can support your project from planning and design through testing and delivery. ### What I can help you with **Product Management & Product Ownership** * Product strategy and roadmap planning * Requirements gathering and user stories * Backlog management and prioritization * Sprint planning and stakeholder coordination * Product discovery and feature definition * Jira and Azure DevOps * Working closely with developers, designers, and business teams **Software Manual Testing & QA** * Manual testing of web and mobile applications * Functional, regression, integration, and usability testing * Test case and test scenario creation * Bug reporting and documentation * User acceptance testing (UAT) * Cross-browser and responsive testing * Reviewing releases and supporting deployment validation **UI/UX Design** * User flows and wireframes * Website and mobile app UI design * Prototypes and usability improvements * Figma and Adobe Creative Suite * Improving existing products based on user needs and business goals **Book & Editorial Layout Design** * Book and eBook layout * Magazine and newspaper layouts * Print-ready document preparation * Typography, page structure, and visual consistency * Adobe InDesign and Adobe Creative Suite ### Why work with me? I bring both a **business and technical perspective** to projects. I have an MBA, a BA in Graphic Design, and PMP certification, and I have worked closely with development teams throughout the full software delivery lifecycle. This allows me to understand not only how a product should look, but also how it should work, how it should be tested, and how it can be delivered successfully. I am comfortable working with international teams and long-term clients, and I value clear communication, reliability, and taking ownership of my work. If you need someone who can help with **product management, QA testing, UI/UX, or book layout design**, I would be happy to discuss your project.

Looking for an AI Engineer who can build high-quality, AI-powered business solutions? You are in the right place. I am a professional AI-Powered Software Developer and SaaS Platform Developer with 10+ years of experience building secure, scalable, and high-performance enterprise web applications and APIs. I help businesses turn ideas into reliable software solutions using modern technologies and best practices. Throughout my career, I’ve helped businesses transform ideas into powerful digital solutions, from designing secure APIs and microservices to developing fast, user-friendly web and mobile apps. I focus on writing clean, optimized, and maintainable code that stands the test of time. I have worked with startups, SMEs, and large enterprises across multiple industries, delivering projects such as: - AI-powered web applications and APIs - SaaS platform development (from idea to production) - Application development from scratch - Troubleshoot and bug fixes for your application - Performance issues in existing applications - Highly transactional enterprise applications - Deploy applications on the server My goal is simple: to turn your ideas into reality with world-class execution, transparent communication, and on-time delivery. I will provide you: - AI-ready and future-proof software architecture - Unlimited Consultation Calls FREE! - Unlimited Revisions FREE! - Clean, reusable, and well-structured code - Best software engineering practices - On-time delivery - 100% client satisfaction - Clear and friendly communication If you’re looking for someone reliable, fast-learning, creative, and committed to quality, I’m here to help you build something exceptional. Let’s work together and take your project to the next level.

Hi, I’m Boris Frenzel — Full-Stack Developer & AI Engineer with 10+ Years of Experience I started coding professionally after 2012 and since then, I've worked in Germany with Multiple companies. I specialize in building scalable backend systems, AI-driven applications, and high-performance web solutions that deliver real business impact. From developing complex automation workflows to fine-tuning large language models, I bring a deep technical skillset and a results-driven mindset to every project. 🔍 AI & Machine Learning Expertise • Integrated OpenAI, Mistral, and custom vLLM models on dedicated GPUs. • Built and deployed AI automation tools, from content generation systems to NLP-based assistants. • Skilled in fine-tuning LLMs, optimizing model inference pipelines, and deploying scalable ML infrastructure. 💻 Full-Stack & Backend Development • Tech stack includes React, Node.js, Python (Django/FastAPI/Flask), PHP, and more. • Built robust APIs, data pipelines, and scalable backend services for high-load environments. • Strong experience with Stripe integrations and PDF processing (e.g., using fpdf2). 🤝 Why Work With Me • Proven track record of delivering high-quality, scalable systems. • Transparent, collaborative, and client-focused approach. • 90%+ client referral rate — clients trust me to take projects from idea to deployment. Let’s build something powerful together.

Expert Unity Game Developer specializing in high-performance Mobile Games, Multiplayer (Photon/Fusion/Quantum), and AR/VR apps. With 10+ years of experience and 100+ games delivered, I help studios bring prototypes to full-scale launch using Unity and C#. Whether you need an optimized build, complex multiplayer integration, or backend architecture, I deliver stable, scalable, and polished results. What You’ll Get Working With Me: 1️⃣ Clean & Scalable Code: Maintainable, production-ready architecture 🧩 2️⃣ High Performance: Optimized builds with smooth FPS & minimal crashes ⚡ 3️⃣ Full-Stack Mastery: Unity + Backend (PlayFab/Firebase) + Deployment ☁️ 4️⃣ Reliable Delivery: Clear communication and strict adherence to deadlines ⏰ Tech Stack: Engine: Unity (2D/3D), Unreal Engine Languages: C#, .NET Core, Node.js Multiplayer: Photon (PUN2, Fusion, Quantum), Mirror, Custom Servers Backend: Firebase, PlayFab, AWS, Azure Platforms: iOS, Android, WebGL, VR/AR (Quest, Vive), PS5/Xbox/Switch Creative & Design: 3D Modeling, VFX, and Animation (Blender, Maya, Photoshop). 💬 Ready to build? Click 'Invite to Job' to share your project idea. I’ll reply with a short action plan and a clear estimate—no fluff, just solutions.