Taler Systems SA - Company

About Us

Taler Systems SA has been developing GNU Taler since 2016. Taler pursues the goal of digitalizing cash and
replicating the advantages of cash, but enhancing them with functionalities like built-in technical security,
payment safety, data minimization and privacy by design. Furthermore, Taler enables new online business
models, especially those based on micropayments. Taler makes payments safe and easy, fully in accordance
with regulatory requirements, AML, KYC, and CFT regulations.

Taler Systems SA was founded in 2016 and is headquartered in Luxembourg.


Christian Grothoff and Leon Schumacher

Founding Proposals

One-click private digital cash payments and tokenization

Business Location

7, Rue de Mondorf, L-5421 Erpeldange, Luxembourg

Legal Form

Société Anonyme

Future Prospects

Revolutionize payments with privacy

Core Business

Financial services
and related


Taler Systems SA is dedicated to Free Software and is one of the high priority projects at the core of the Free/Libre and Open Source Software (FLOSS) community. Thus, the company gains the interest of ambitious programmers in the field and gathers several GNU maintainers as team members. As a consequence, the company combines high-ranking competencies, programming skills, academic expertise and proven business knowledge to debut with a disruptive state-of-the-art solution that revolutionizes the payments industry.

Meet The Team

Taler Systems SA has four core team members:

Leon Schumacher

Chairman Of The Board

Leon is a leader in the international CIO community who possesses a deep knowledge of the needs and functioning of Fortune 100 companies. Prior to co-founding Taler, Leon served as group CIO at two global companies, Mittal Steel and Novartis. Leon earned his master’s in electrical engineering from ETH Zürich and his master’s in management from HEC Paris. He also has a post-MBA certificate from the Kellogg School of Management at Northwestern University.

Christian Grothoff


Christian is professor for computer science at the University of Applied Sciences in Bern (Fachhochschule Bern) focusing on network security and privacy. He is an Ashoka fellow, serves on the GNU advisory board and maintains four GNU software packages. He earned his PhD in computer science from UCLA, an M.S. in computer science from Purdue University, and a Diploma in Mathematics from the University of Wuppertal.

Berna Alp

Managing Director

Berna has been volunteering her time in several organizations fighting for an open and free Internet with built-in privacy as well as open and free software. She is the current chair of Thunderbird Project and serves on the Boards of the ISOC Switzerland Chapter and the Pretty Easy Privacy Foundation. She is an economist by trade, has been involved in IT projects for more than 25 years. She worked as SAP FI/CO/JVA consultant at Andersen Consulting in New York, in a trading company and for projects of the World Bank.

Rahel Surbeck

Head of Human Resources

Rahel gathers long-term knowledge in the fields of staff coaching, training and HR development. Our employees and team members are also benefiting from her organisational talent at Taler's frequent work retreats where she cares for us and our guests from all over the world. Rahel excels with brilliant psychological capabilities and manages our HR resources from eight nations, has responsibility for gender equality, conflict management, diversity, and internationalisation of our growing team, urging to employ more female members than is proportionate to the IT industry nowadays.

Florian Dold


Florian is a passionate programmer and researcher. Prior to co-founding Taler, he worked on GNUnet, a decentralized and privacy-preserving peer-to-peer framework. Florian earned his Master of Science from the Technical University of Munich. He obtained his PhD at Inria / Rennes 1 in this subject.

Marie Walrafen

Head of Marketing

Marie has been involved in video production, served as a parliamentary attaché and coordinated several successful international campaigns for Internet freedom and privacy. Together with her intense knowledge of networking, Marie serves as our Head of Marketing to propagate Taler's media and sales strategies to rapidly scale and make us known to businesses and publishers on an international level.

Michael Widmer

Legal & Regulatory Affairs

Michael is an entrepreneur and he brings to Taler his extensive banking and financial market experience. In his 20 years of experience in the international financial sector, he worked as a commercial lawyer, as managing director of the Eurex stock exchange and as Co-CEO of the Gutenberg Group. He received a Ph.D. in Law from the University of Zurich and an executive MBA from University of Rochester. Michael is also admitted to the Bar Association in Zurich.


Join Our Team

Taler Systems SA is always looking for skilled programmers.

Taler's code is based on Free Software and ranks as a high priority project of the Free Software Foundation (fsf.org). You will be co-working with us for a fascinating project in a compelling environment and collaborate with hackers thriving forward the freedom of the internet.

iOS App Developer

We are looking to hire an iOS app developer as freelancer to build and test an iOS application for Taler. Your primary focus will be the migration of our existing Taler wallet app for Android (written in Kotlin). The iOS app to be developed will be based on Swift and should run on the latest Apple mobile devices. Ideally, you possess a strong working knowledge of iOS Frameworks, you know how to deal with the adaption of native designs for Apple users, and you should be proficient in using native C libraries within iOS.

    Your responsibilities:
  • checkmarkDesigning and building a mobile application for Apple’s iOS platform.
  • checkmarkCollaborating with the design team to define app features.
  • checkmarkEnsuring quality and performance of the application to specifications.
  • checkmarkIdentifying potential problems and resolving performance bottlenecks.
  • checkmarkFixing application bugs before the final release.
  • checkmarkPublishing the Taler application on the App Store.

  • checkmarkExperience with Swift, iOS Frameworks such as Core Data and Core Animation.
  • checkmarkAt least basic knowledge of UX design and its implementation.
  • checkmarkKnowledge of Apple’s design principles and application interface guidelines.
  • checkmarkProficiency in using code versioning tools (Git).
  • checkmarkExperience with continuous integration and bug trackers (Mantis).

In case of your interest in this job please send us an e-mail to ceo@taler.net or give us a call.

  • Full Time
  • Anywhere

Backend Developer / Junior Backend Developer

In case of your interest in this job please send us an e-mail to ceo@taler.net.

  • Full Time / Half Time
  • Anywhere

Backend Developer / Junior Backend Developer

In case of your interest in this job please send us an e-mail to ceo@taler.net.

  • Full Time / Half Time
  • Luxembourg

Contact Us Today

You can get into touch with Taler Systems SA via e-mail, phone or mail:

Reach Us

7, Rue de Mondorf, L-5421 Erpeldange, Luxembourg

Email Us

Get into touch with us via e-mail to

Call Us

Have a question?
Tel: +41 44 280 1200