Recommended expert

Leif Stolberg

Software Architect

Leif Stolberg
Erlangen, Germany

Experience

Apr 2025 - Present
10 months

Software Architect

QualityMinds GmbH

  • Lead software architect and technical team lead for a new logistics platform for load carrier trade
  • Core design of software architecture using arc42 spanning frontend, backend, delivery strategies and cloud native infrastructure with Domain Driven Design and Hexagonal Architecture
  • Evaluation of initial business requirements and software development roadmap
  • Technical team lead in a Scrum team of 9 people
  • Introduced and strengthened AI-assisted (JetBrains AI & GitHub Copilot) and collaborative code development strategies to speed up feature development
Oct 2023 - Present
2 years 4 months
Erlangen, Germany

Freelance IT Consultant and Software Architect

Quantum42 Consulting

  • Focus on solution architecture or team enablement as software development and architecture lead or Scrum Master
  • Operative test migration for a multinational mobile telecommunications operator (Dec 2023 – Sep 2025)
  • Migration of jMeter tests to Karate & Gatling for a designated work package of 100 APIs & micro-services
  • Used AI-assisted code development strategies (JetBrains AI & GitHub Copilot) to speed up transformation processes and test reporting
  • Reported to stakeholders and management on project advancement
Jul 2023 - Mar 2025
1 year 9 months

Lead Developer & IT Architect

enableYou Consulting GmbH

  • Focus on solution architecture, test migration, business development
  • Lead test migration manager for a multinational mobile telecommunications operator (Oct 2023 – Mar 2025)
  • Oversaw migration of a testing system of over 500 APIs & micro-services distributed over 6 individual international Scrum teams with 16 QAs
  • Managed an external team of 7 to accelerate migration efforts
  • Coordinated with stakeholders and management regarding timelines and agile migration paths
  • Prototype development of efficient test runners and report builders integrated into CI/CD flow
  • Lead software developer in a Scrum team of 8 people for introduction of scalable salary payments-related Java microservices on AWS platform at a German tax and auditing software house (Oct 2023 – Sep 2024)
  • Implemented EBICS and PAIN formats using ISO 20022 standard for payments transactions
  • Promoted agile principles, self-organization and accountability in teams
  • Served as product owner of an internal software development project
  • Engaged in start-up business development and held fiscal responsibility for IT consulting services
Jan 2020 - Jun 2023
3 years 6 months

Senior IT Consultant and Software Developer

Senacor Technologies AG

  • Focus on solution architecture, mobile app roll-out and QA across multiple projects in financial institutions and automotive
  • Developer & head QA engineer/test manager in a Scrum team for new scalable Java microservices on AWS handling VISA debit card transactions using ISO 8583 & ISO 20022 and integrating with Ab Initio backend ETL for data warehousing (Apr 2021 – Jun 2023)
  • Coordinated with stakeholders and management on testing timelines and cooperative testing with external systems (VISA, Google Pay, Apple Pay, core banking system)
  • Interim lead developer and product owner for the Scrum team of 11 people
  • Software developer & test manager for backend ETL processes and extensive database testing during restructuring & consolidation of legacy IT systems on mixed OS environments (Apr 2020 – Apr 2021)
  • Created Java tools to derive a domain-specific language for underlying data model
  • Led launch and migration of an automotive mobile app for a German multinational automobile manufacturer (Jan 2020 – May 2020)
  • Participated in CI/CD and automation innovation chapters, project acquisition and hiring
Feb 2019 - Dec 2019
11 months

Junior IT Consultant and Software Developer

Senacor Technologies AG

  • Focus on data warehousing with ETL: developed a data warehouse combined with restructuring & consolidation of production IT systems on RHEL followed by integration testing at a major financial institution
  • Designed and developed data pipelines in Ab Initio
  • Automated test environments
  • Created a data modeling framework
  • Managed test processes for customized data warehouses
Mar 2013 - Jan 2019
5 years 11 months

Teaching and Research Assistant, later Research Group Lead

Friedrich-Alexander University Erlangen-Nuremberg

  • Taught physics courses to student groups of 6 to 100 participants
  • Head of a research team (Aug 2016 – Jan 2019) with 2 fellows and up to 3 thesis candidates: team organization, grant acquisition, collaboration with research groups, conference speaking, preliminary thesis grading
  • Graduate research fellow residency at Humboldt University, Berlin (Sep 2016 – Sep 2017): mathematical modeling and numerical simulations of gravitational and electromagnetism properties
  • Undergraduate research fellow residency at CERN, Geneva (Jun 2013 – Aug 2013): set up neutrino detector experiments, data analysis and cleansing, numerical simulations
  • Administered and maintained computational clusters: calibration of legacy instruments (MS-DOS, Windows 3.1x, NT4), package management, HPC cluster and network administration
  • Participated in appointment committees for professorship evaluations
Apr 2011 - Sep 2011
6 months

Working Student in Simulation Engineering

Siemens AG

  • Executed and optimized Monte Carlo simulations of C16 atoms and protons for particle therapy using GEANT4
  • Created statistical mathematical models and optimized algorithms
Nov 2010 - Nov 2012
2 years 1 month

Laboratory Assistant

MIT Lincoln Laboratory

  • Executed tests to simulate a rail gun and later a rail gun prototype
  • Optimized and created mathematical models and algorithms of dynamic movement (Nov 2010 – Mar 2011)
  • Optimized shot trajectories (Oct 2011 – Nov 2012)

Summary

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.

Skills

  • C++ (7+ Yrs)
  • Java (6+ Yrs)
  • Python (5+ Yrs)
  • Software Testing (6+ Yrs)
  • Ab Initio & Informatica (4+ Yrs)
  • Sql (4+ Yrs)
  • Devops (4+ Yrs)
  • Cloud Native (4+ Yrs)
  • Linux (10+ Yrs)
  • Scientific Data Analysis (6+ Yrs)
  • Test Management (4+ Yrs)
  • Ci/cd (6+ Yrs)
  • Agile Leadership (4+ Yrs)

Languages

German
Native
English
Native

Education

Oct 2016 - Jun 2019

FAU Erlangen-Nürnberg

PhD Physics, Numerical approach to area driven gravitational properties of quantum electrodynamics · Physics · Erlangen, Germany · magna cum laude

Oct 2014 - Jun 2015

Université Grenoble Alpes (prev. Joseph Fourier University)

Physics · Grenoble, France

Oct 2013 - Jun 2016

FAU Erlangen-Nürnberg

M. Sc. Physics, Geometrical and gravitational properties of linear electrodynamics on the area metric · Physics · Erlangen, Germany · 1.1

...and 2 more

Certifications & licenses

ISTQB Certified Tester Foundation Level (CTFL)

iSAQB Certified Professional Foundation Level (CPSA-F)

AWS Cloud Practitioner

A Cloud Guru

Ab Initio Certified Developer

Advanced Certified Scrum Master (A-CSM)

Scrum Alliance

LPIC 1 - Linux Administrator

Linux Professional Institute

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