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I'm Bastian

Senior Consultant .NET Developer Freelancer

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I'm a passionate developer from germany with 10+ years of professional experience and deep knowledge of C#. Skilled in .NET, .NET Core and client-side development with WinForms or ASP.NET Core. Experienced in planning and leading projects in close communication with executive-level decision makers and end-customers, including governmental bodies.



  • Languages: C#, JavaScript, HTML/CSS, SQL
  • Technologies: .NET, .NET Core, ASP.NET Core, EF Core, WinForms, Bootstrap, jQuery, DevExpress
  • Databases: MariaDB, MySQL, MS SQL
  • Operating Systems: Windows, Windows Server, Linux Server
  • Tools: Visual Studio, ReSharper, DevExpress
  • Other: API design, Relational Databases, Docker, CI/CD (Gitlab, TeamCity)
More of my story

A comprehensive overview of my skills, experiences, and achievements.

Work Experience

Senior Consultant

2023 - Present

Sieger Consulting

Sieger Consulting is a reputable and established consulting firm in the IT industry. With years of experience and a team of seasoned professionals, Sieger Consulting offers a wide range of services in Full-Stack Development, consulting, collaboration, and tutoring. The company's focus is to help businesses and individuals alike to achieve their technological goals through innovative and cutting-edge solutions. With a strong commitment to customer satisfaction, Sieger Consulting has become a go-to for businesses looking to grow and succeed in today's digital landscape.

My personal story here has not been written yet... so stay tuned.

Full Stack Developer

2017 - 2023

medDV GmbH

medDV GmbH is a leading software development company in the healthcare industry that provides a dynamic and stimulating work environment for developers. The company's innovative solutions for medical practices, clinics, and hospitals demonstrate its commitment to improving patient outcomes and streamlining healthcare processes.

Here I have been responsible for a range of software development and strategy-related activities. Specifically, I have been involved in the development of data analysis and visualization software using WinForms and Razor (ASP.NET Core) with DevExpress, as well as the development of automated data analysis and monitoring software using .NET Core.

In addition to my development work, I have also been responsible for defining product strategies in consultation with end-customers and internal stakeholders. This has involved working closely with customers to understand their needs and developing strategies that align with their goals.

As part of my work on deployment strategies, I have implemented on-premise server systems using Docker and provided consultation to end-customers regarding their server structure and hardware. Additionally, I have designed the data structure and storage strategy of sensitive data and implemented and validated software security standards related to this data.

To ensure high quality code, I have implemented quality processes such as Code Reviews, Merge Requests, and Coding Guidelines. I have also provided advice on general software architecture and provided training to apprentices and interns.

As part of my role, I have also been responsible for educating colleagues on new technologies and building and maintaining internal system architecture using established software on Windows and Linux servers, including the acquisition and assembly of hardware.

Overall, my experiences at medDV GmbH helped me grow as a developer by providing me with a diverse range of skills and experiences in software development, project management, and project leadership.

Software Developer

2015 - 2017


Throughout my freelance work I have had the opportunity to work with a diverse range of customers on various web-based software solutions. My expertise lied in ASP.NET and PHP, and I have utilized these languages to develop websites for artists, small businesses, and social clubs. In particular, I build significant experience building websites using WordPress and HTML/CSS.

In addition to my development work, I have also been responsible for advising customers on internal and external system architecture. This has involved working closely with clients to understand their unique needs and providing guidance on how to structure their systems for maximum efficiency and effectiveness.

Outside of my primary work, I have also had the opportunity to tutor students and apprentices. This has involved providing guidance on various topics related to development, including coding languages, development methodologies, and software architecture.

Overall, my experience working with a variety of customers and projects, coupled with my expertise in development and system architecture, made me a valuable asset to any organization.

Software Developer

2012 - 2015

KoCoS Messtechnik AG

KoCoS Messtechnik AG is a cutting-edge technology company that provides a challenging work environment for developers. The company's advanced measurement and testing solutions are used across a range of industries, including power engineering, aerospace, and automotive, demonstrating its commitment to advancing technology in key sectors. The company places a strong emphasis on teamwork and collaboration, with a focus on developing solutions that meet the needs of its clients. Their commitment to excellence and its focus on innovation make it an ideal workplace for developers who are passionate about technology and pushing boundaries.

My career in software development began here with a focus on data visualization and management solutions. Early on, I developed data visualization software using WinForms and DevExpress. This experience helped me develop a strong understanding of how to create software that can effectively communicate complex data to end-users in a clear and intuitive way.

Building on this experience, I went on to develop a management solution for automated test scripts using ASP.NET. This project allowed me to hone my skills in developing software that is not only visually appealing, but also highly functional and efficient.

These early experiences helped me develop a deep passion for software development and a strong understanding of the importance of user-centered design. As my career progressed, I continued to build on this foundation, expanding my skills and expertise to include a variety of programming languages, development methodologies, and software architecture practices.

Overall, my early experiences developing data visualization and management solutions set the stage for a successful and rewarding career in software development, and I continue to draw on these experiences today as I tackle new and exciting development challenges.


IT Specialist Application Development

2012 - 2015

Hans-Viessmann-Schule Frankenberg

Learning at Hans-Viessmann-Schule Frankenberg provided me with a strong foundation in various software development methodologies and project management techniques. The school's emphasis on practical, real-world training allowed me to develop critical thinking skills, problem-solving abilities, and the ability to work effectively in a team environment. Overall, my time at Hans-Viessmann-Schule Frankenberg was invaluable in preparing me for a career as a successful developer.


Qualification as a trainer (IHK) – AEVO


Industrie- und Handelskammer Gießen-Friedberg

As someone who has always aspired to become a trainer, obtaining a qualification at the IHK was a pivotal step in my career. The qualification involved learning the skills necessary to design and conduct training sessions, evaluate the success of training programs, and create effective training materials. The program provided a solid foundation in adult learning principles, instructional design, and performance evaluation. Through this training, I gained the necessary knowledge and skills to become an effective trainer in my field, and to help others develop their own professional skills in the world of development.

What I can do for you

Explore the range of services I offer and how I can help you achieve your goals. With my expertise and experience in the field, I am committed to delivering high-quality services that cater to your unique needs. From development and implementation to training and consulting, my services are designed to help you navigate the ever-evolving world of technology and stay ahead of the curve.

I'd love to hear from you

If you have any questions or inquiries about my services, I would be happy to hear from you. Please feel free to reach out to me and I will get back to you as soon as possible. You can find my email address and social media links below. I look forward to hearing from you!

Where to find me

35394 Gießen, Germany

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