Leif Stolberg-Software Architect
Check rate
Experience
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
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
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
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
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
Teaching and Research Assistant, later Research Group Lead
Friedrich-Alexander-Universität Erlangen-Nürnberg
- 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 writing, collaboration with research groups, conference presentations, preliminary thesis evaluations
- Graduate research fellow residency at Humboldt University, Berlin (Sep 2016 – Sep 2017): mathematical modeling and numerical simulations of gravitational and electromagnetic properties
- Undergraduate research fellow residency at CERN, Geneva (Jun 2013 – Aug 2013): set up neutrino detector experiments, data analysis and cleaning, numerical simulations
- Administered and maintained computing clusters: calibration of legacy systems (MS-DOS, Windows 3.1x, NT4), package management, HPC cluster and network administration
- Served on search committees for professorship appointments
Working Student in Simulation Engineering
Siemens AG
- Performed and optimized Monte Carlo simulations of C16 atoms and protons for particle therapy using GEANT4
- Developed statistical models and optimized algorithms
Laboratory Assistant
MIT Lincoln Laboratory
- Ran tests to simulate a railgun and later a railgun prototype
- Created and optimized mathematical models and dynamic movement algorithms (Nov 2010 – Mar 2011)
- Refined shot trajectories (Oct 2011 – Nov 2012)
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Banking and Finance, Education, Automotive, Professional Services, Telecommunication, and Aerospace and Defense.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Research and Development, Quality Assurance, Project Management, and Business Intelligence.
Summary
I have over 10 years of experience in software development and more than 7 years in IT consulting, combining strong theoretical foundations with hands-on skills. I bring expertise in data integration, software roll-out strategies, and the design of scalable and maintainable systems. My work spans banking, telecommunications, and scientific research, and I have a knack for handling legacy systems alongside modern cloud-native solutions.
I support teams by bridging the gap between quality assurance and software development, ensuring smooth migrations and effective project management. I continuously learn new technologies and share my knowledge through teaching and training, combining my passion for innovation with a structured, customer-oriented approach.
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
Education
FAU Erlangen-Nürnberg
PhD Physics, Numerical approach to area driven gravitational properties of quantum electrodynamics · Physics · Erlangen, Germany · magna cum laude
Certifications & licenses
A Cloud Guru
Ab Initio Certified Developer
Scrum Alliance
Linux Professional Institute
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Leif is based in Erlangen, Germany.
Leif speaks the following languages: German (Native), English (Native).
Leif has at least 16 years of experience. During this time, Leif has worked in at least 8 different roles and for 7 different companies. The average length of individual experience is 2 years and 11 months. Note that Leif may not have shared all experience and actually has more experience.
Based on recent experience, Leif would be well-suited for roles such as: Software Architect, Freelance IT Consultant and Software Architect, Lead Developer & IT Architect.
Leif's most recent position is Software Architect at QualityMinds GmbH.
In recent years, Leif has worked for QualityMinds GmbH, Quantum42 Consulting, enableYou Consulting GmbH, and Senacor Technologies AG.
Leif is most experienced in industries like Banking and Finance, Education, and Automotive. Leif also has some experience in Telecommunication, Professional Services, and Aerospace and Defense.
Leif is most experienced in business areas like Information Technology, Product Development, and Research and Development. Leif also has some experience in Quality Assurance, Project Management, and Business Intelligence.
Leif has recently worked in industries like Banking and Finance, Automotive, and Telecommunication.
Leif has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.
Leif holds a Doctorate in Physics from FAU Erlangen-Nürnberg.
Leif has 6 certificates. Among them, these include: ISTQB Certified Tester Foundation Level (CTFL), iSAQB Certified Professional Foundation Level (CPSA-F), and AWS Cloud Practitioner.
Leif is immediately available part-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Similar freelancers
Discover other experts with similar qualifications and experience
Niko Schmuck
Jens Rehsack
Michael König
Lothar Hinsche
Michael Fecher
Matthias Kittner
Werner Keil
Rainer Diekmann
Hüseyin Korkut
Tezcan Dilshener
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Software Architect
Peter Fleischer
Jan Mundo
Kenan Šabić
Christoph Thodte
Paul Webster
Waldemar Biller
Manuel Reinfurt
Jürgen Fey
Johannes Knörzer
Kiriakos Krastillis
Nearby freelancers
Professionals working in or nearby Erlangen, Germany
Rolf Wendolsky
Maciej Sawicki
Sabine Liberty
Eric Fresz
Chunyu Freelancer
Oleg Orlov
Bhagyashree Mandlik
Daniel Despa
Agelis Wassilios
David Onaiyekan
