Leif Stolberg
Freelance IT Consultant and Software Architect
Erfahrungen
Freelance IT Consultant and Software Architect
Quantum42 Consulting
- Focus: Solution architecture or team enablement.
- Software development and architecture lead.
- Scrum Master.
- Looking for freelance projects.
- Technologies include Java w/ Spring.
Lead Test Migration Manager
enableYou Consulting GmbH
- Migration of JMeter tests to Karate and Gatling.
Lead Software Developer
enableYou Consulting GmbH
- Introduced scalable salary payment–related Java microservices on an AWS platform at a large German software house for tax and auditing.
- Implemented EBICS and PAIN formats using the ISO 20022 standard for payment transactions.
- Integrated deep testing practices and reliability and resilience for critical processes.
- As an agile leader, enabled the team to live by agile principles, promoting self-organization and accountability.
- Supported the customer’s architecture board with new decision templates and innovative solutions.
- Acted as product owner of an internal software development project.
- Conducted start-up business development for IT consulting services in conjunction with co-founders.
- Held fiscal responsibility for IT consulting services.
Lead Developer & IT Architect
enableYou Consulting GmbH
- Focus: Solution architecture, test migration, business development.
- Software development lead and testing specialist focusing on facilitating fairness and honesty for big and small corporations.
- Leading companies by example to a self-organized way of work.
Test Migration Manager
enableYou Consulting GmbH
- Overseeing the migration of a testing system of over 500 APIs and microservices distributed over 6 individual and international Scrum teams with their 16 QAs.
- Responsible for an external team of 7 to accelerate the migration.
- Coordinated with stakeholders and management regarding timelines and efficient, agile migration paths and methods.
- Developed prototypes of efficient test runners and report builders to integrate into the existing CI/CD flow.
- Provided architectural feedback and delivery strategies.
Developer & Head QA Engineer / Test Manager
Senacor Technologies AG
- Contributed code and testing infrastructure for business cases and set up customized services for internal testing.
- Introduced new scalable Java microservices on an AWS platform handling transactions for VISA debit cards (using ISO 8583 & ISO 20022).
- Integrated these services with an Ab Initio backend running ETL processes for the financial institution’s data warehouse.
- Coordinated with stakeholders and management regarding testing phase timelines and cooperative testing with external systems such as VISA, Google Pay, Apple Pay, and core banking systems.
- Interim lead developer and product owner for the Scrum team (11 people).
- Later functioned in the same position in an agile team in charge of several microservices concerning credit card transactions and processing.
Software Developer & Test Manager
Senacor Technologies AG
- Restructured and consolidated legacy IT systems running in a mixed operating system environment including AIX and Microsoft Windows NT4.
- Found a solution for a reporting platform of a German investment and development bank.
- Developed backend ETL processes for the financial institution’s data warehouse with extensive database testing.
- Created Java tools to derive a domain specific language for the underlying data model.
Senior IT Consultant and Software Developer
Senacor Technologies AG
- Focus: Solution architecture, mobile app roll-out and QA.
- Demonstrates knowledge of Agile, facilitation & coaching principles, as well as performing the role of a Scrum Master.
Senacor Technologies AG
- Launched and migrated an automotive mobile app for one of Germany’s largest multinational corporations.
- Participated in innovation chapters around CI/CD, automation, project acquisition, and hiring.
Junior IT Consultant and Software Developer
Senacor Technologies AG
- Focus: Data warehousing with ETL.
- Developed a data warehouse combined with restructuring and consolidation of productive IT systems running on RHEL.
- Performed integration testing of the data warehouse at a major financial institution.
- Designed and developed data pipelines in Ab Initio.
- Automated test environments.
- Created a data modeling framework.
- Managed testing of customized data warehouses.
- Technologies include Ab Initio, Xtend (Java), Oracle, Control-M.
Graduate Research Fellow
Humboldt-Universität zu Berlin
- Conducted mathematical modeling of complex physical properties of gravitation and electromagnetism.
- Performed numerical simulations of these mathematical models.
Junior Research Fellow
CERN
- Set up experiments for neutrino detectors using bonded ASICs for the Medipix & Timepix project.
- Analyzed and cleansed detector result data.
- Performed numerical simulations of the detectors.
Teaching and Research Assistant, later Research Group Lead
Friedrich-Alexander-Universität Erlangen-Nürnberg
- Taught courses in physics to student groups of 6 to 100 participants.
- Led a research team comprised of 2 fellows and up to 3 bachelor and master thesis candidates (August 2016 to January 2019), responsible for team organization, grant acquisition, collaboration with other research groups, conference speaking, and preliminary thesis grading.
- Conducted postgraduate research in quantum geometry, including mathematical modeling of complex physical properties of gravitation and electromagnetism and numerical simulations.
Laboratory Assistant
MIT Lincoln Laboratory
- Optimized shot trajectories for Rail Gun prototype.
- Technologies include C++ & Python.
Werksstudent Simulation Engineering
Siemens AG
- Executed and optimized simulations in particle therapy of C16 atoms and protons with Monte-Carlo methods using GEANT4.
- Created statistical mathematical models and optimized algorithms.
- Technologies include C++ (including CERN libraries).
Laboratory Assistant
MIT Lincoln Laboratory
- Optimized and created mathematical models and algorithms of dynamic movement.
- Technologies include C++ & Python.
Zusammenfassung
IT Professional with >6 years consulting experience in the field and strong theoretical skills as well as practical know-how in problem solving thanks to >10 years of developing software. Worked in scientific research for >4 years before that. And I have a passion for learning new things and sharing my knowledgewith others by teaching / training others aswell as all things HomeLab.
Strong knowledge in the field of data integration in banking, software roll-out procedures, shaping of new IT landscapes as well as mathematical modeling and simulation of complex problems. I have also worked in the fields of scientific simulations and embedded. My knowledge further extends to legacy IT-Systems running old, abandoned software. Dating back to past-era environments like Windows 3.x/NT4 and MS-DOS or the Linux Kernel 2.4.x.
Currently, also formingmy own freelance enterprise both focusing on facilitating fairness and honesty. Enabling organizations to successfully manage their teams to achieve and lead successful software projects.
I’m in the process of broadening my horizon in the field of business development. Right now in my projects, I function as a test migration manager within a telecommunications company and consult on amigration strategy. Else, I bring exemplary knowledge in managing software or dedicated QA teams to the table. Skilled both in automation and architecture of customized business solutions, such as scalable micro services, data warehousing or ETL. Experienced with large transformation projects and heterogeneous infrastructures. The link between software quality and development, comfortable in both.
Customer-oriented and structured method of working, focused on quality and maintainability. Highly motivated to work in a team, both comfortable in big companies as well as small teams. No concerns with traveling.
Sprachen
Ausbildung
FAU Erlangen-Nürnberg
PhD Physics · Physics · Erlangen, Deutschland · magna cum laude
FAU Erlangen-Nürnberg
M.Sc. Physics · Physics · Erlangen, Deutschland · 1.1
FAU Erlangen-Nürnberg
B.Sc. Physics · Physics · Erlangen, Deutschland · 1.2
Zertifikate & Bescheinigungen
Ab Initio Certified Developer
Advanced Certified Scrum Master (A-CSM)
Scrum Alliance
LPIC 1 - Linux Administrator
Linux Professional Institute
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