About Feldwerk


Business Mission

We develop highly specialised technologies and situational auction methods based on them to radically reduce the cost of mobile services for large companies.


Service Concept

At least 40% effective savings

Telecommunications network operators are not in a position to identify the exact structure of the customer's needs, let alone to determine afterwards which tariffs and options are the best for the customer. The result is that costs are far too high.

We have highly specialised software and infrastructure that enables us to record the usage data of several months of all users of a company in detail and to simulate it with any number of tariff models, so that in the end the factually best result is calculated. It is not unusual for the calculations to be so complex that they can only be carried out with several servers in parallel in an acceptable time.

However, even absolute transparency of tariffs, options and detailed requirements alone cannot develop the full optimisation potential. This is because the dominant position of a few suppliers usually makes it considerably more difficult to achieve the optimum determined.

Therefore we develop special auction designs based on the systemically generated knowledge and taking into account the supplier oligopoly as well as your individual supplier objectives, which guarantee the efficient achievement of the lowest possible total costs.

By combining our technology with individually developed auction methods, we have achieved effective savings of more than 40% for our customers.



Our technology and auction methods are multinational.

Due to our technological ability to generate country-specific tariff-relevant knowledge within the shortest possible time and to process country-specific data formats, we can provide our services on a multinational basis.

Accordingly, we have references in numerous European countries and the USA.



Software, Analytics, Game Theory and Auktion Design

Software and Analytics

The calculation of the most economical tariff allocation requires a cost simulation with permutation of all tariff parameters including a representative usage basis.

In terms of software, several special requirements have to be met. When recording usage data, the problem is not so much the processing of up to several hundred megabytes as the provider-specific interpretation of the usage data. This is because each provider provides a proprietary syntax or even a proprietary data format in each country, for which a respective interpreter and converter must be programmed. We have programmed a special development environment for this purpose, which speeds up the adaptation of new formats many times over. This is the prerequisite for being able to directly involve new suppliers in the simulation for international projects. In the same way, we have solved the requirement for the creation of new tariffs, because the tariff constructs are sometimes categorically different, especially across countries.

In addition to mapping the tariff structures, the actual simulation of an offer is a another central technical challenge. Since the optimal solution for each individual participants is to be determined, this is a classic optimisation problem. Here subject-specific optimised algorithms are used to speed up the solution of the problem. Since up to several tens of thousands of participants have to be simulated, a linear calculation would take several hours to days. Therefore a parallel processing and horizontal scalability is an important requirement. Accordingly, the simulations are based on is calculated in a cluster, so that the simulation results can be made available promptly.

Game Theory and Auction Design

Game theory deals with situations in which the success of the individual depends not only on his own decision-making behaviour but also on that of others. The aim is to derive and therefore predict rational decision-making behaviour on the basis of methods to be defined and the corresponding mathematical models.

Our auction designs are always modelled in such a way that, on the one hand, your possible specific requirements are met by the bidder and, on the other hand, their bids reach the lowest possible price.

Examples of basic designs developed by Feldwerk and successfully applied internationally are the "Sequential Call Auction (SCA)" and the "Parallel Call Auction (PCA)" and the "Multiple Parallel Call Auction (MPCA)".

The Sequential Call Auction is a single-stage auction that maximises the probability of success of the deal with the existing supplier while at the same time ensuring that the empirically lowest price is achieved and that the competition is intense.

The Parallel Call Auction is a two-stage auction with identical chances of success for all participating bidders while ensuring that the factually lowest possible market price is achieved.

The Multiple Parallel Call Auction a three-stage auction with identical chances of success for all participating bidders while ensuring that the de facto lowest possible market price is achieved.


Corporate Culture

Transparency and Commitment

Our service concept as well as our approach are characterised by absolute transparency and commitment.

This credo also applies to our behaviour towards suppliers. Every bidder receives basically all the information necessary to assess the chances in the auction process.

Darüber hinaus sind diese Informationen im Rahmen unserer Auktionsdesigns grundsätzlich immer rechtsverbindlich.

The supplier can always win the auction deterministically from his own resources; a fact that is often not given with the conventional purchase of mobile services.

Conceptual transparency and commitment are decisive factors in creating a willingness among suppliers to submit the best offer.



Our management has extensive knowledge of the telecommunications industry and many years of experience in developing complex software solutions.

ARNDT JABLONOWSKI, Commercial Manager and Managing Director…

… previously held management and consulting positions with various German and Swiss telecommunications network operators and in the high-tech industry.

In 2010, together with Andre Goldflam and Sandro Wolf, he started to develop the technology to calculate mobile phone tariffs and use it for companies to reduce costs.

ANDRE GOLDFLAM, Head of Software Development…

… is responsible for software development. His main focus is on the technical conception and design of software architectures with a specialisation in distributed applications.


SANDRO WOLF, Head of System Architecture…

… is responsible for the system architecture. His main focus is on the individual design and implementation of distributed applications based on specific problems, technical issues, special quality features and other requirements.