WORK & REFERENCES
Discover a snipped of the portfolio of crafted work and successful client projects. The proven track record demonstrates the ability to cultivate strong customer relationships and consistently deliver tailored results. Whether it's expanding your client base through successful marketing initiatives, developing various applications, or effectively managing cloud environments, the dedication shines through. This kind of end-to-end responsibility can be experienced by you too.
E-Rechnung-Kit
Link to the website
Situation
Electronic invoices (e-invoices) are digital documents that contain invoice information in a structured and standardized format. In contrast to traditional paper or PDF invoices, e-invoices offer numerous advantages in terms of efficiency, accuracy and compliance. In the context of e-invoices in Germany and Europe, the Zugferd/Factur-X or XRechnung standards are particularly relevant. Some of these standards in particular are complicated to understand, time-consuming to implement and impractical to use, which makes dealing with e-invoicing challenging for many of those affected. It must be simple and understandable! In the area of e-invoicing, the link between this over-regulation and the users should now be created, which does not require a large IT department within the company.
Solution
The objective is to offer practical solutions for e-invoices and accounting for SMEs so that they can concentrate on the important parts of their business. The user is supported by the fact that e-invoices (= machine-readable format) are prepared for a review by an actual person, e.g. when an invoice is received. Otherwise, when an invoice is viewed, the user would have to dive into a XML file with a data format with different standards (Zugferd, XRechnung) in different variants (Profile Basic, Profile EN16991, CIUS, Extension, ...) in different syntaxes (CII, UBL) with different versions. Automated validation is also offered, in short: is this invoice correct? This is essential for e-invoices, as they must comply with business rules (BR) in accordance with EU Directive EN16931 and the national version (the German CIUS). An example of this is given with an excerpt from BR-47: Each sales tax breakdown 'VAT BREAKDOWN' (BG-23) must be defined via a coded designation of a sales tax category' VAT category code' (BT-118). The user is also supported in the creation of e-invoices. Specifically, the user is guided through the creation of an e-invoice so that complicated gray areas are deliberately avoided. To implement these requirements, a core component and frontends based on it were written for various platforms such as Microsoft Outlook (especially for invoice receipt), Windows-Desktop (PC) and web. The core along with the web api was written in .Net Standard 2.0 and .Net 8 and integrates the processing logic for the described use cases as well as the interface to the payment processor (Stripe). The integration into Microsoft Outlook was implemented using MS Outlook VSTO Customization (Classic Outlook) and MS Outlook Addin (New Outlook).
Lebenserinnerungen e. V.
Link to the website
Situation
The association promotes personal, verbal and biographical storytelling with storytelling opportunities. It provides formats and suggestions for shared storytelling and promotes projects that serve this purpose. People are brought together through storytelling. The association develops, organizes and implements storytelling projects of various kinds in order to facilitate spontaneous, authentic storytelling. Storytelling requires listening, and that is something that people don't allow each other enough, especially when it comes to strangers. The association not only promotes storytelling, but also listening.
Solution
The customer has an existing html website as a baseline. Content cannot be added or maintained. The focus was to address these issues by expanding the website capabilities maintainability. The website was rebuilt using Wordpress to meet the requirements. For the page builder Elementor was selected and should help the team to update the website by themself. The service included the developing on the corporate identity. Especially the corporate design and the corporate language. At the end, the team received training on how to add their own content to the Wordpress site.
Topnotch
Situation
Topnotch is a review-sharing platform where users can evaluate competing state of the art offerings. It serves as a hub for product- and service providers to reach a global audience, while users can discover and engage with a diverse range of their offerings. Topnotch implements a platform business model including actors like viewer, advertisers and content creators like product manufacturers or service providers (companies). Topnotch tries to build a community ecosystem to address questions like “What is the best off-road automobile” or “What is the best platform to release on first web, mobile or Desktop”.
Solution
Topnotch is a company based on entrepreneurial work which emphasizes the hands-on competition of different offerings. Most of the decisions were open for discussion. The focus was mainly to work on modeling the business domain and prototyping a first web application. The infrastructure was set up in the cloud environment for the resulting frontend and backend. In addition, the SEO was optimized by optimizing the website by targeting selected keywords and setting up SEO tools especially in the Google environment.
Bitlabs.global
Situation
Bitlabs is a venture specializing in process and product development and consulting for customers. They have been providing this service since 2022. Their goal is to help businesses thrive by providing them with the tools needed to succeed.
Solution
The customer needed a web presence to get their first customers in the surrounding area. SEO was an important aspect. To address the problem the development of a corporate identity for the customer was started. The website design was refined based on corporate identity. The website was development utilizing SEO-friendly server-side-rendering (SSR). The next step was to improve the marketing by further optimizing SEO on the application and web-space level. Data streams of website analytics were put into place to analyze current visitors and potential customers. A Google Business Profile/GMB was created. After only three months the customer was getting 15+ request/month via the developed website alone.
Master-Thesis - HTW Berlin, Charité Berlin
“WEB APPLICATION FOR DEVELOPING PLATFORM-BASED BUSINESS MODELS IN THE CONTEXT OF DIGITAL HEALTH”
Link to the thesis
Domain
The thesis covers the development of a web application (self-service) for the collaborative creation of platform-based business models in the Digital Health sector. The challenges include establishing the theoretical foundations, focusing on the systematic of business model development, which entails identifying, describing, and analyzing these models, as well as selecting an appropriate systematic. Additionally, implementing the business model development process according to the chosen systematic involves developing algorithms for computer-assisted implementation and integrating these algorithms into the context effectively.
Solution
Various approaches to business model development were examined. One particularly promising systematic for business model development was selected. IT system and architecture was established according to the selected approach. That includes designing algorithms and appropriate domain models for the consistency matrix, the computation of the strategy bundles, to conduct the cluster analysis and the calculation of the characteristic's matrix. The theoretical foundation was implemented through a Proof of Concept (PoC) in the form of a web application. Finally, the integration of the algorithm and the domain model was successfully achieved.
Bachelor-Thesis - HTW Berlin, Charité Berlin
“NEURAL NETWORKS - PREDICTION-BASED CACHING OF DOCUMENTS”
Link to the thesis
Domain
The thesis covers the creation and integration of a system that determines whether any given document will be accessed again within a specified period based on past document accesses. Scalability investigations are conducted regarding the number of computers utilized. Challenges encompass three distinct areas.
- Development of the system infrastructure: orchestration of compute nodes for the neural network
- Data analysis to get insights of the data: feature engineering for the neural network
- Development of a neural network
Solution
Achievements have been made across all critical areas: infrastructure, data analysis and the neural network. On the infrastructure site virtual servers have been deployed. These servers formed the computing cluster by installing spark (data processing) alongside with kubernetes (neural network processing) orchestration. The distributed storage was managed by NFS. In the realm of data analysis for Gigabytes of data, HDFS and Spark with Scala have been utilized, complemented by the RDD-API and Dataframe-API for streamlined processing. The data preprocessing involved the creation of batches tailored for computation with RNNs. A Recurrent Neural Network architecture was designed and implemented to tackle the classification problem. The network includes an encoder (Relu), Recurrent Layer (tanh) and a Decoder (Softmax). The Cost function is defined by argmax(Cross Entropy+L2-Regularization). For the optimization Gradient Descent (Adam Optimizer) was utilized. For research purposes PyTorch & MXNet and for the distributed training Tensorflow were used. Training Time was about several hours.
