Thomas Zeman Email & Phone Number

Sydney, Nsw, Au

Sydney, New South Wales, Au

Sydney, New South Wales, Au

Engineering Lead for Tyro's integration with the American Express OptBlue programI joined Tyro's Payments department to lead the pricing and costing team and to coordinate the backlog of up to two offshore teams.In May 2022 the head of the department asked me to kick-off, lead and coordinate the technical implementation of Tyro's entire OptBlue integration. On the organizational side this involved establishing requirements documentation with Product Manager, holding weekly catchu-ps with Amex representatives, using question registries to effectively removing roadblocks for our developers, facilitating security audits, achieving the OptBlue certification before the Amex change freeze.On the technical side, I orchestrated the team's work on low-level protocols including the GCAG ISO link, PIN encryption via HSM, the process of clearing (GFSG) and reconciliation (GRRCN). This also entailed integrating OptBlue into various Tyro internal frontends, such as those for chargeback handling or financial reporting. Additionally, OptBlue was fully integrated with Tyro's existing pricing and costing structures.Tyro was certified as official OptBlue acquirer by then end of 2022 and went live in the second half of 2023.

Sydney, New South Wales, Au

Tyro Connect (2yrs)- Typescript, Javascript, React, NodeJSBanking (1yr)- Integration with BPay- Tyro's Bank Account- Extending and trouble shooting Tyro's internal accounting system (Double-entry bookkeeping)- Kotlin

Forchheim, De

Technical lead of an agile scrum team whose focus is the major architectural redesign of parts of a complex medical software platform which is the basis for several next-gen scanners (MRI, CT and others) and a product named syngo.via. Run lean experiments during development which includes giving end-to-end responsibility to developers or introducing slack time for learning. Regular meetings with the product owner to discuss product functional requirements, software qualities expected outcomes and technical feasibility. Chairing constructive decision meetings with the team concerning the structural design of the software, best-practices regarding the implementation as well as the continuous integration, branching and testing strategy. Participation in assessment workshops of software qualities according to their importance for the customer. Aligned architecture and design to support most critical non-functional requirements such as performance, scalability and fail-safety. Ensure technical and architectural consistency amongst 10+ scrum teams who base their work on the work created by my team. Set up SO-like collaboration page with e.g. discussion forum to spread knowledge and keep everyone in the know while reducing email traffic. Create educational videos describing finalised parts of the new architecture in order to enhance common understanding of the system and keep everyone on the same level. Document design choices and technical decomposition of the software in FDA and TUEV audit relevant process documentation artefacts. Introduced state of the art programming methods, techniques and libraries in team as well as organisation-wide such as asynchronous programming or immutable data structures.

Forchheim, De

Trained in lean principles, waste in production and development, various retrospective methods and value-stream analysis.Moderation of various types of retrospectives within the organisation. Moderator of several Management Hoshin Kanri workshops with functional and cross functional teams to maximise outcome. Applying A3-problem-solving method, doing root-cause analysis with Ishikawa diagrams and moderated sessions to define “north-star” targets with a time horizon of 5 years. Presenter of lean principles and practices for software developers which manifest in common standards for example Test Driven Development or a Coding Guideline. Applying various root cause analysis methods for software defects with the aim to avoid this bug category in the future.Creator of the an internal Craftsmanship program which is based on gamification aspects. The goal of the program is to increase the software quality as well as reach cultural change in developers’ values.

Forchheim, De

Siemens Healthcare - Business Unit: syngo - Projects: syngo.via and internal software platform- Responsible for work on numerous infrastructure software components such as a RPC framework, high performance socket communication, reliable message queues, system resource management and others in and for a very large code base (Magnitude of 10M+ LOCs)- Profound knowledge in many different practices including continuous integration, version control, testing pyramid, testing in isolation, static code analyzers, API design for a big number of consumers, non-breaking changes, controlling dependencies, refactoring, product performance analysis, root cause analysis, document handling and many others.- Permanent technical alignment with development teams over the world. Mostly with electronic communication but also visits to Hungary or India.- Author and trainer of the C# coding guideline as well as co-author for the API design guideline- Evangelist for CleanCode, Software Craftsmanship and high quality in general.- Organized and lead "Developer Community of Practice" including internal website, regular meetings and presentations to foster knowledge sharing between developers. - Founded Healthineers internal cross business line developer conference to enable networking, acquired budget and speakers and aligned proceeding with Management. Hosted first conference, technical presenter and discussion moderator in following years.

Forchheim, De

Initiated rewrite of syngo Imaging product installer by developing a prototype in C# and showing advantages to organization. Got responsibility for rewrite as technical lead of 3 people and created software which automated installation in an extensible workflow design over up to 4 nodes in a Windows Server and Linux cluster. Successfully turned a several hundred pages long installation manual into a fully automated cross platform installer. Gathered cross platform experience with the Linux parts running on Mono.

Creator of arcade game "Buggs" for Android and iOS. http://tinyurl.com/jdzjgj3- Gained knowledge on how to develop a cross platform game title with Unity3D

Erlangen, Bavaria, De

Working in teams on "syngo Imaging" for Siemens Medical Solutions in various areas: Porting of an Auditing and Messaging component from Java to C++, prototyping and development of a web access feature based on Apache2 running on Linux, refactorings of the product installer written in Visual Basic 6. Collaboration with pre- and system integration test teams.

Development of software and tests for the driver's cabin of freight trains within a waterfall project meeting functional and design specifications. Applied code review methods like Walkthrough and Fagan in regards to e.g. different Safety Integrity Levels (SIL).Software driver written in C/C++ based on Win32/COM to enable application layer to access the embedded display hardware and its functions like a watchdog. Application for managing the start/stop lifecycle of the automation software WinCC.