Leif Stolberg - Software Architect

Q: Where is Leif based?

Leif is based in Erlangen, Germany .

Q: What languages does Leif speak?

Leif speaks the following languages: German (Native), English (Native) .

Q: How many years of experience does Leif have?

Leif has at least 15 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.

Q: What is Leif's latest experience?

Leif's most recent position is Software Architect at QualityMinds GmbH .

Q: What companies has Leif worked for in recent years?

In recent years, Leif has worked for QualityMinds GmbH , Quantum42 Consulting , enableYou Consulting GmbH , and Senacor Technologies AG .

Q: Which industries is Leif most experienced in?

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 .

Q: Which business areas is Leif most experienced in?

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 .

Q: Which industries has Leif worked in recently?

Leif has recently worked in industries like Banking and Finance , Automotive , and Telecommunication .

Q: Which business areas has Leif worked in recently?

Leif has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Erlangen, Germany

Check rate

Experience

Apr 2025 - Present

1 year 3 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 9 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-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

Apr 2011 - Sep 2011

6 months

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

Nov 2010 - Nov 2012

2 years 1 month

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, Telecommunication, Professional Services, and Aerospace and Defense.

Banking and Finance

Education

Automotive

Telecommunication

Professional Services

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.

Information Technology

Product Development

Research and Development

Quality Assurance

Project Management

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

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

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

Statistics

Experience

Total positions 8

Experience in Banking and Finance 6 y

Avg length 2 y 3 m

Longest experience 5 y 10 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Software Architect, Freelance IT Consultant and Software Architect, Lead Developer & IT Architect

Main industries Banking and Finance, Education, Automotive

Main business areas Information Technology, Product Development, Research and Development

Qualifications

Highest degree Doctorate

Certifications earned 6

Profile

Created

July 2023

Last Update

June 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Leif based?

Leif is based in Erlangen, Germany.

What languages does Leif speak?

Leif speaks the following languages: German (Native), English (Native).

How many years of experience does Leif have?

Leif has at least 15 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.

What roles would Leif be best suited for?

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.

What is Leif's latest experience?

Leif's most recent position is Software Architect at QualityMinds GmbH.

What companies has Leif worked for in recent years?

In recent years, Leif has worked for QualityMinds GmbH, Quantum42 Consulting, enableYou Consulting GmbH, and Senacor Technologies AG.

Which industries is Leif most experienced in?

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.

Which business areas is Leif most experienced in?

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.

Which industries has Leif worked in recently?

Leif has recently worked in industries like Banking and Finance, Automotive, and Telecommunication.

Which business areas has Leif worked in recently?

Leif has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Leif's education?

Leif holds a Doctorate in Physics from FAU Erlangen-Nürnberg.

Does Leif have any certificates?

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.

What is the availability of Leif?

Leif is immediately available part-time for suitable projects.

What is the rate of Leif?

Leif's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.