Oliver Fries - Senior Analytics Software Engineer & Tech Lead

Q: Where is Oliver based?

Oliver is based in Lemgo, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Oliver speak?

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

Q: How many years of experience does Oliver have?

Oliver has at least 14 years of experience. During this time, Oliver has worked in at least 9 different roles and for 9 different companies . The average length of individual experience is 1 year and 5 months . Note that Oliver may not have shared all experience and actually has more experience.

Q: What roles would Oliver be best suited for?

Based on recent experience, Oliver would be well-suited for roles such as: Senior Analytics Software Engineer & Tech Lead, Senior Software Engineer, Software Development Mentor .

Q: What is Oliver's latest experience?

Oliver's most recent position is Senior Analytics Software Engineer & Tech Lead at Optano GmbH .

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

In recent years, Oliver has worked for Optano GmbH , Fraunhofer IOSB-INA , Mentoring activities , and Miele & Cie. KG .

Q: Which industries is Oliver most experienced in?

Oliver is most experienced in industries like Information Technology , Education , and Manufacturing . Oliver also has some experience in Food and Beverage , Agriculture , and Transportation .

Q: Which business areas is Oliver most experienced in?

Oliver is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Oliver also has some experience in Research and Development and Operations .

Q: Which industries has Oliver worked in recently?

Oliver has recently worked in industries like Manufacturing and Information Technology .

Q: Which business areas has Oliver worked in recently?

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

Recommended expert

Lemgo, Germany

Experience

Sep 2024 - Mar 2026

1 year 7 months

Senior Analytics Software Engineer & Tech Lead

Optano GmbH

Took over technical ownership of an existing .NET legacy codebase and improved the sprint delivery rate from ~70% to >95% through consistent prioritization of technical debt, clear code ownership, and enforceable engineering standards
Established a stable CI/CD pipeline (TeamCity, Docker) and reduced build and deployment times by ~40% through standardized stages, automated quality gates, and clean dependency management
Shortened release cycles from quarterly to biweekly, creating a reliable foundation for continuous feature delivery to enterprise customers
Reduced production errors by 64% within six months through targeted legacy refactorings, expanding the test pyramid, and stabilizing business-critical modules
Increased runtime performance by up to 40% through decoupling compute-intensive paths, caching strategies, and performance profiling
Technologies & methods: C#, .NET, Blazor, ASP.NET (MVC/Web API), CI/CD, TeamCity, Docker, NUnit, Shouldly, Moq, Refactoring, Modularization, Agile Scrum, Performance optimization, Code reviews, Security (Keycloak), NuGet, WPF, Technical debt, Portainer, Docker Swarm, NDepend, Dependency cleanup, CodeRabbit, Legacy assessment, Codebase assessment, MSBuild, Dependency management, Clean Architecture, Clean Code, Requirements engineering, Build optimization

Mar 2024 - Sep 2024

7 months

Senior Software Engineer

Fraunhofer IOSB-INA

Developed a GenAI prototype for automated AAS creation from technical documents and nameplates, reducing manual modeling time from about 5 hours to under 15 minutes per AAS
Restructured the AASX Server and PackageExplorer for production use through clear architectural decisions for six core components, reducing critical runtime errors by around 70%
Established an end-to-end CI/CD pipeline with GitHub Actions, shortening release cycles from several weeks to under seven days through automated builds, tests, and analyses
Measurably increased system performance and reduced startup times by 35% through modernizing runtime dependencies and optimizing build pipelines
Improved code quality sustainably through enforceable coding standards and automated tests, significantly reducing regression rework
Enabled cross-project reuse by defining interoperable AAS and OPC UA data models in industry projects like Factory-X and Condition Monitoring
Technologies & methods: C#, .NET 8, Blazor, Python, Docker, GitHub Actions, AAS, AASX Server, OPC UA, CI/CD, Automated testing, Software architecture, Performance optimization, NUnit, Strangler Fig Pattern, Dependency management, DDD, Technical debt, Code ownership, Coding guidelines, Clean Code, Serilog, Incremental Modernization, Breaking changes management, Moq, NDepend, Legacy Assessment, Codebase Assessment, MSBuild, FluentValidation, Modular Monolith, xUnit, Build optimization

Oct 2022 - Present

3 years 6 months

Software Development Mentor

Mentoring activities

Mentored an aspiring software developer for over 12 months until successful training completion and a clear career entry
Established a structured learning framework with weekly goals and regular mentoring sessions for sustainable skill development
Accelerated practical transfer of technical fundamentals through real-world tasks, significantly reducing onboarding in new topics
Supported career entry through technical preparation and decision guidance, avoiding trial-and-error switches
Technologies & methods: software development, mentoring, structured knowledge transfer, problem analysis, feedback processes, C#, test pyramid, MSBuild, Clean Code

Jan 2021 - Mar 2024

3 years 3 months

Senior Software Engineer

Miele & Cie. KG

Temporarily took on the role of Technical Product Owner/Tech Lead for a 7-member team over seven release cycles, increasing sprint completion from ~75% to >95% through clear technical prioritization and a debt-focus
Played a key role in modernizing an established .NET codebase (Xamarin → .NET MAUI) for a production enterprise application with >300,000 monthly active users, reducing app crashes by ~60% within 12 months
Established binding clean code rules, architectural guidelines, and quality gates across 13 teams, raising automated test coverage from ~25% to >70%
Reduced regression errors by >50% through consistent test automation, refactoring, and technical consolidation of a codebase with >300,000 LOC
Reduced technical debt by decoupling critical modules and cut integration time for new features from several days to <1 day per module
Supported data-driven product decisions by introducing analytics for core features, increasing their usage by ~30%
Accelerated team skill development through pair programming and mentoring, halving onboarding time for new developers from ~6 to <3 weeks
Technologies & methods: C#, .NET MAUI, Xamarin, ASP.NET-based services, SonarQube, FluentAssertions, Moq, automated tests, refactoring, modularization, quality gates, analytics, pair programming, agile development, .NET 7, NuGet, Clean Architecture, resilience, DDD, performance profiling, story mapping, root cause analysis, Serilog, legacy assessment, codebase assessment, MSBuild, modular architecture, Clean Code, requirements engineering, integration patterns

May 2019 - Dec 2020

1 year 8 months

Senior Software Engineer & Technology Consultant

Salt & Pepper Technology GmbH

Delivered international cross-platform projects (C#, Xamarin) across more than five product modules, ensuring consistent releases in distributed teams
Reduced regression errors by about 45% within six months through mocking-based tests, clear acceptance criteria, and structured review checklists
Designed modular architecture concepts for applications with over 100,000 LOC, reducing feature implementation time from several days to under 1–2 days per module
Advised customers in consumer electronics and agricultural technology on architecture and technology decisions, preventing costly misinvestments through early system designs
Developed internal tools for project coordination, measurably reducing coordination effort and queries between development, QA, and product management
Technologies & methods: C#, Xamarin, mobile cross-platform development, Git, Jira, Bitbucket, automated testing, mocking, software architecture, code reviews, legacy assessment, codebase assessment, NUnit, test pyramid, MSBuild, modular architecture, Clean Architecture, interface design, Clean Code, FluentAssertions, SonarQube

May 2018 - Nov 2018

7 months

Systems Engineer

International Transport Company

Managed the stable operation of a Microsoft infrastructure for over 500 users and ensured system availability of over 95% through structured maintenance windows, monitoring, and targeted troubleshooting
Implemented and maintained Active Directory structures for more than 20 functional and role profiles, reducing onboarding and offboarding processes from several hours to under 30 minutes
Increased access security by consolidating, documenting, and cleaning up historical permissions, reducing security-related support cases by over 40%
Stabilized Windows Server environments through targeted configuration adjustments, root cause analysis of recurring issues, and sustainable resolution of structural problems
Created complete system, operations, and handover documentation, enabling independent ongoing operation without external dependencies
Technologies & Methods: Windows Server, Active Directory, Microsoft infrastructure services, identity & access management, monitoring, troubleshooting, system & operations documentation

Dec 2016 - Feb 2019

2 years 3 months

Research Associate

University of Trier

Developed custom software tools (Python, Flask) for research and digitization projects, reducing manual evaluations from hours to minutes
Supported over 20 ongoing research projects by automating data preparation, analysis, and prototyping, significantly reducing errors and rework
Established reproducible analysis pipelines with Python, SQL, and MongoDB, increasing traceability of scientific results through versioning
Served as technical liaison between research, teaching, and IT, shortening coordination and implementation cycles from weeks to a few days
Enabled students and staff to independently further develop existing software artifacts through workshops and mentoring
Technologies & Methods: Python, Flask, SQL, MongoDB, GitLab, data analysis, workflow automation, reproducible research, Azure DevOps, CI/CD, interface design

Sep 2015 - Nov 2016

1 year 3 months

Software Engineer Mobile Enterprise Development

DataOne GmbH

Developed and maintained production enterprise applications for client environments, delivering stable releases in short iterations under live conditions
Handled over 100 second-level support cases, systematically analyzed logs and root causes, and reduced average resolution time to under 24 hours
Cut recurring incidents by ~30% through sustainable root cause analysis and structural defect correction
Worked closely on system integration and data flows between applications and backend systems, ensuring consistent, reproducible processes
Technologies & Methods: production system stabilization, error analysis, support proximity, system integration, agile development, Azure DevOps, interface design, root cause analysis, observability, technical debt remediation, dependency cleanup, breaking changes management, refactoring

May 2013 - May 2015

2 years 1 month

Research Assistant

University of Trier

Maintained and calibrated measurement and sensor systems for multiple parallel test setups, improving measurement stability through systematic adjustments
Automated existing measurement and evaluation processes, reducing iteration cycles between measurement and results from days to hours
Enabled stable long-term measurement runs spanning hours to days without technical interruptions
Analyzed large datasets and structured the results for research reports
Translated experimental requirements into robust, maintainable technical solutions
Technologies & Methods: automation, system stability, technical analysis, reproducible processes, breaking changes management, legacy assessment, code ownership, coding style guides

Aug 2011 - Jul 2013

2 years

IT System Support & Software Development

Franchise Restaurant Company

Managed the stable operation of the IT and hardware infrastructure across multiple branch locations, significantly reducing unplanned downtime in daily operations
Modernized existing systems and shortened update and adjustment cycles through in-house maintenance instead of external dependencies
Migrated central operational systems to cost-efficient, mobile solutions, cutting hardware costs by over 50% without impacting ongoing operations
Carried out technical migrations under production conditions, ensuring complete functional parity
Digitized operational processes incrementally without interrupting business operations
Technologies & Methods: system operation, legacy modernization in production, process digitization, cost optimization, legacy assessment, incremental modernization, dependency cleanup

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Education, Manufacturing, Food and Beverage, Agriculture, and Transportation.

Information Technology

Education

Manufacturing

Food and Beverage

Agriculture

Transportation

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, Research and Development, and Operations.

Information Technology

Product Development

Quality Assurance

Research and Development

Operations

Summary

Senior Software Engineer & Tech Lead for .NET legacy modernization with over 14 years of experience stabilizing and evolving production-critical .NET enterprise systems in industrial and research environments.

My core expertise is modernizing existing .NET codebases (C#, .NET Framework→ .NET 6/7/8/9), architecture refactoring, CI/CD stabilization, test automation, and ensuring software delivery while in operation. I prefer working in complex brownfield systems where downtime is not an option and technical debt must be actively reduced.

Proven impact from real industry projects:

64% fewer production errors
70% faster release cycles
400,000 lines of code migrated step by step to modern .NET stacks
95% release stability through robust build, test, and deployment pipelines

Experience at Miele, Salt & Pepper Technology, and Trier University of Applied Sciences – from industrial production systems to large-scale .NET applications and research-focused software.

I apply Industry 4.0 domain knowledge (e.g., OPC UA, Asset Administration Shell) where it delivers real value to existing systems.

I stand for clear technical decisions, measurable quality, and pragmatic solutions. My focus is on quick stabilization, sustainable architecture, and empowering teams – without over-engineering.

Roles: Senior .NET Engineer | Tech Lead | Interim Architect | Technical Consultant

Focus: .NET legacy modernization, delivery & CI/CD stabilization in industry

Skills

.Net Legacy Modernization

C# (Expert)
.Net 6/7/8/9 (Expert)
Blazor (Expert)
.Net Maui (Expert)
Asp.net (Mvc/web Api) (Expert)
Refactoring (Expert)
Modularization (Expert)
Nuget Package/versioning Strategy (Expert)
Ef Core (Advanced)
Modular Architecture (Advanced)
Dependency Management (Advanced)
Nuget (Advanced)
Wpf (Advanced)

Architecture & Engineering

Clean Architecture (Expert)
Interface Design (Expert)
Technical Debt (Expert)
Code Ownership (Expert)
Coding Style Guides & Guidelines (Expert)
Clean Code (Expert)
Requirements Engineering (Expert)
Integration Patterns (Advanced)
Modular Monolith (Advanced)
Resilience (Advanced)
Ddd (Intermediate)
Performance Profiling (Advanced)
Story Mapping (Intermediate)

Delivery & Quality

Ci/cd (Expert)
Github Actions (Expert)
Test Pyramid (Expert)
Xunit (Expert)
Nunit (Expert)
Moq (Expert)
Fluentassertions (Expert)
Shouldly (Expert)
Teamcity (Advanced)
Msbuild (Advanced)
Build Optimization (Advanced)
Sonarqube (Advanced)
Ndepend (Advanced)
Azure Devops (Intermediate)
Bitbucket (Intermediate)
Fluentvalidation (Intermediate)
Coderabbit (Intermediate)

Platform/runtime

Docker (Advanced)
Root Cause Analysis (Expert)
Docker Swarm (Advanced)
Observability (Advanced)
Serilog (Advanced)
Portainer (Intermediate)

Modernization

Legacy Assessment (Expert)
Codebase Assessment (Expert)
Strangler Fig Pattern (Expert)
Incremental Modernization (Expert)
Dependency Cleanup (Advanced)
Breaking Changes Management (Advanced)
Technical Debt Remediation (Advanced)

Data, Platforms & Interfaces

Sql Server (Advanced)
Mongodb (Expert)
Opc Ua (Intermediate)
Aas (Asset Administration Shell) (Advanced)

Agile Methods, Roles & Tools

Scrum (Expert)
Scrum Master (Advanced)
Kanban (Expert)
Agile Software Development (Expert)
Product Owner (Advanced)
Tech Lead (Advanced)

Communication, Leadership & Collaboration

Team Leadership (Intermediate)
Mentoring (Advanced)
Pair Programming (Expert)
Technical Leadership (Advanced)

It Operations, Systems & Support

User & Rights Management (Advanced)
Security Basics (Advanced)
Troubleshooting (Expert)

Research, Automation & Analysis

Process Automation (Advanced)
Process Optimization (Expert)
Data Analysis (Advanced)

Roles & Delivery

Senior Software Consultant (Expert)
Tech Lead (Advanced)
Technical Product Owner (Advanced)
Dev Ops (Intermediate)

Soft Skills & Additional Competencies

Technical Leadership & Mentoring
Pair Programming & Code Reviews As A Learning Method
Onboarding New Team Members (Halving Onboarding Time)
Establishing Engineering Best Practices Across Teams
Explaining Technical Concepts Clearly To Non-technical Stakeholders
Acting As A Bridge Between Development, Qa, And Product Management
International Team Coordination (Consumer Electronics, Agricultural Technology)
Systematic Troubleshooting In Complex Legacy Systems
Root Cause Analysis For Sustainable Error Resolution
Pragmatic Architecture Decisions Without Over-engineering

Languages

German

Native

English

Advanced

Education

Aug 2016 - Mar 2019

Trier University of Applied Sciences

Master of Science in Business Informatics · Business Informatics · Trier, Germany

Aug 2011 - Jul 2016

Trier University of Applied Sciences

Bachelor of Science in Computer Science · Computer Science · Trier, Germany

Jul 2008 - Mar 2011

DHC GmbH

IT Specialist in Application Development · Saarbrücken, Germany

Certifications & licenses

Foundational C# With Microsoft

ISTQB - Certified Tester

Statistics

Experience

Total positions 10

Experience in Information Technology 6 y

Avg length 1 y 10 m

Longest experience 3 y 5 m

Expertise

Recent roles Senior Analytics Software Engineer & Tech Lead, Senior Software Engineer, Software Development Mentor

Main industries Information Technology, Education, Manufacturing

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Master

Certifications earned 2

Profile

Created

February 2026

Last Update

February 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Oliver based?

Oliver is based in Lemgo, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Oliver speak?

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

How many years of experience does Oliver have?

Oliver has at least 14 years of experience. During this time, Oliver has worked in at least 9 different roles and for 9 different companies. The average length of individual experience is 1 year and 5 months. Note that Oliver may not have shared all experience and actually has more experience.

What roles would Oliver be best suited for?

Based on recent experience, Oliver would be well-suited for roles such as: Senior Analytics Software Engineer & Tech Lead, Senior Software Engineer, Software Development Mentor.

What is Oliver's latest experience?

Oliver's most recent position is Senior Analytics Software Engineer & Tech Lead at Optano GmbH.

What companies has Oliver worked for in recent years?

In recent years, Oliver has worked for Optano GmbH, Fraunhofer IOSB-INA, Mentoring activities, and Miele & Cie. KG.

Which industries is Oliver most experienced in?

Oliver is most experienced in industries like Information Technology, Education, and Manufacturing. Oliver also has some experience in Food and Beverage, Agriculture, and Transportation.

Which business areas is Oliver most experienced in?

Oliver is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Oliver also has some experience in Research and Development and Operations.

Which industries has Oliver worked in recently?

Oliver has recently worked in industries like Manufacturing and Information Technology.

Which business areas has Oliver worked in recently?

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

What is Oliver's education?

Oliver holds a Master in Business Informatics from Trier University of Applied Sciences and a Bachelor in Computer Science from Trier University of Applied Sciences.

Does Oliver have any certificates?

Oliver has 2 certificates. These include: Foundational C# With Microsoft and ISTQB - Certified Tester.

What is the availability of Oliver?

Oliver is immediately available full-time for suitable projects.

What is the rate of Oliver?

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