Marvin Bayhan
Software Engineer
About
Software engineer focused on backend-centric systems, specialized in designing and evolving services, automation, and operational tooling with a strong emphasis on quality and long-term maintainability.
2003 - 2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
Career
since Sep 20257 months
Independent Software Engineer / Freelance & Personal Projects
Moorkyzsince Sep 20257 months
Working independently on backend- and systems-oriented software projects, combining client work with the development of personal technical projects. Design and implementation of full-stack web applications and backend services using ASP.NET, Node.js, and modern web frameworks, including REST-based system integrations and database-driven applications.
Responsibility for end-to-end system design, covering data modeling, API design, authentication concepts, and infrastructure setup on Linux-based servers. Planning and execution of client projects, including requirements analysis, technical consulting, solution design, implementation, and ongoing maintenance.
Management of client relationships and project workflows, including coordination, documentation, and delivery across multiple engagements. Implementation of containerized deployment workflows using Docker and CI/CD pipelines.
In parallel, development of Unity-based applications and multiplayer game systems, including networking concepts and server-side components. Moorkyz serves as a technical environment for applying platform-level design decisions, system integration patterns, and infrastructure-aware software development in both client and personal projects.
Mar 2023 - Aug 20252 years 6 months
Automation Developer & Consultant
Automation4All UGMar 2023 - Aug 20252 years 6 months
Process automation developer and consultant in enterprise environments, specializing in backend-oriented automation systems and platform-level improvements. Designed and evolved large-scale RPA solutions with UiPath, including SAP automation, refactoring of existing landscapes, and modular architectures.
Developed custom .NET libraries for automation infrastructure, supported orchestration concepts and system integrations via REST and SOAP. Technical consultant for clients including dmTech and BTC AG, leading workshops on UiPath, Git, and Clean Code, and establishing sustainable development standards.
Additional work included intelligent document processing (IDP) with UiPath Document Understanding and integrations with Active Directory and Azure AD.
Apr 2021 - Sep 20221 year 6 months
Business Informatics (Bachelor of Science)
Karlsruher Institut für Technologie (KIT)Apr 2021 - Sep 20221 year 6 months
Feb 2021 - Jul 20221 year 6 months
Working Student
SIEMENS DI PAFeb 2021 - Jul 20221 year 6 months
IT-Administrator, Automation Developer, Web Developer, CI/CD
Oct 2016 - Mar 20214 years 6 months
Informatics (Bachelor of Science)
Karlsruher Institut für Technologie (KIT)Oct 2016 - Mar 20214 years 6 months
Jun 2019 - May 20201 year
Working Student
SIEMENS DI FAJun 2019 - May 20201 year
Automation Developer, Web Developer, CI/CD
Nov 2016 - May 20177 months
Working Student
Studyflix GmbHNov 2016 - May 20177 months
Technical Content Developer (Computer Science)
Sep 2003 - Jul 201612 years 11 months
Baccalauréat (Abitur / High School Diploma)
European School Karlsruhe (ESK)Sep 2003 - Jul 201612 years 11 months
Projects
since Sep 20257 months
Personal Project: Moorkyz
Moorkyzsince Sep 20257 months
- Design and development of multiple personal software projects with a focus on backend systems, architecture, and long-term maintainability
- Full-stack development of web applications using ASP.NET, Node.js, Next.js, and TypeScript
- Design and implementation of REST APIs, including authentication, authorization, and system integration
- Database design and integration using PostgreSQL with ORM-based data access
- Setup and maintenance of Linux-based server environments, including deployment, configuration, and access control
- Containerization and deployment workflows using Docker and CI/CD pipelines
- Design and development of Unity-based applications and games, including gameplay systems and networking
- Implementation of multiplayer networking concepts using Photon Fusion 2
- Continuous refinement of software architecture, system design, and infrastructure security across all projects
Full-StackWeb DevelopmentSoftware DevelopmentGame DevelopmentSoftware ArchitectureSystem IntegrationServer AdministrationBackend Infrastructure
Sep 2023 - Aug 20252 years
RPA Development & Consulting
dmTECHSep 2023 - Aug 20252 years
- Automation of SAP & Web-based business processes using UiPath
- Maintenance, optimization, and further development of existing RPA bots
- Planning and facilitation of internal workshops on RPA, UiPath, Git, GitLab, and general development standards, including clean coding practices
- Improvement of the business automation infrastructure
- Design and development of reusable .NET libraries to improve modularity and maintainability of RPA solutions
Tech LeadCRMConsultingRPAUiPathProcess AutomationSAPGit
Apr 2025 - May 20252 months
Entertainment Application Development
Kunstmuseum KarlsruheApr 2025 - May 20252 months
- Development of an entertainment application 'Memory' for the 'Update! Die Sammlung neu sichten' exhibition
- Close collaboration with the exhibition team to ensure thematic and design consistency
- Implementation of engaging user interactions and animations to enhance the visitor experience
CRMConsultingUnityC#.NET
Mar 2025 - Apr 20252 months
Entertainment Application Development
Naturschutzzentrum Karlsruhe-RappenwörtMar 2025 - Apr 20252 months
- Development of an entertainment application 'Puzzle' for the 'Zukunft Moor!' exhibition
- Close collaboration with the exhibition team to ensure thematic and design consistency
- Implementation of engaging user interactions and animations to enhance the visitor experience
CRMConsultingUnityC#.NET
Jun 2024 - Feb 20259 months
RPA Development & Consulting
BTC AGJun 2024 - Feb 20259 months
- Design and development of a web service (React / ASP.NET) to simplify the execution and control of processes and transactions in UiPath Orchestrator
- Optimization of the RPA infrastructure
- Extension and refactoring of existing RPA processes to align with the updated infrastructure
- Development of backend RPA processes
- Optimization and maintenance of existing .NET and UiPath libraries
CRMConsultingRPAUiPathProcess AutomationWeb DevelopmentReactASP.NET
Nov 2024 - Nov 20241 month
Entertainment Application Development
Naturschutzzentrum Karlsruhe-RappenwörtNov 2024 - Nov 20241 month
- Development of an entertainment application 'Puzzle' for the 'Wasserwelten' exhibition
- Close collaboration with the museum owner to ensure thematic and design consistency
- Implementation of engaging user interactions and animations to enhance the visitor experience
- Deployment and testing of applications on-site to ensure optimal performance and usability
CRMConsultingUnityC#.NET
Jul 2024 - Sep 20243 months
Entertainment Application Development
Kunstmuseum KarlsruheJul 2024 - Sep 20243 months
- Development of two entertainment applications 'Puzzle' & 'Memory' for the 'Elliott Erwitt Vintages' exhibition
- Close collaboration with the exhibition team to ensure thematic and design consistency
- Implementation of engaging user interactions and animations to enhance the visitor experience
- Deployment and testing of applications on-site to ensure optimal performance and usability
CRMConsultingUnityC#.NET
May 2023 - Feb 202410 months
DocAI (Intelligent Document Processing)
Automation4All UGMay 2023 - Feb 202410 months
- Technical lead and project lead for the Document AI initiative
- Research, development, and training of open-source intelligent document processing (IDP) models
- Use of UiPath Document Understanding and AI Center to develop and train custom machine learning models for unstructured text- and image-based documents
- Coordination of technical tasks and guidance of team members during implementation
Tech LeadProject ManagementScrumAIRPAUiPathDocument UnderstandingIntelligent Document Processing
Apr 2023 - Aug 20235 months
RPA Active Directory
BTC AGApr 2023 - Aug 20235 months
- Design and development of a software solution enabling communication between systems via SOAP and REST (Omnitracker v1 → UiPath Orchestrator)
- Planning and implementation of automation solutions for Active Directory and Azure Active Directory using the UiPath REFramework
- Design and development of reusable UiPath libraries to improve consistency and reuse of common functionality
RPAUiPathProcess AutomationActive DirectoryAzure Active DirectorySOAP APIREST APIWeb Services
Apr 2023 - Jun 20233 months
RPA T2Med
MVZ RuhpoldingApr 2023 - Jun 20233 months
- Planning and development of automation solutions for T2Med using UiPath and Document Understanding
RPAUiPathProcess AutomationDocument UnderstandingIntelligent Document Processing
Aug 2022 - Oct 20223 months
E-Commerce CMS Support
.flagbitAug 2022 - Oct 20223 months
- Support and further development of existing Shopware-based e-commerce CMS elements
CRMShopwareSymfonyPHPVue.js
Feb 2021 - Jul 20221 year 6 months
Automation solutions for Active Directory and Security Compliance
SIEMENS DI PAFeb 2021 - Jul 20221 year 6 months
- Automation of Windows Server administration based on server metadata using PowerShell
- Automation of Active Directory user administration via an email-driven service implemented in PowerShell and Python
- Design and implementation of an automated process to analyze Git repositories and identify security policy violations based on defined security standards
- Automated remediation of repository configurations and versions to address identified security issues
- Automation of Active Directory user integration into the Siemens Administration Web Service on Linux using PowerShell and Bash
IT-AdministrationPowerShellPythonBashLinuxWindows ServerActive DirectorySecurity Compliance
Jun 2019 - May 20201 year
Development of an S7DOS Test Environment and an AWB Plugin
SIEMENS DI FAJun 2019 - May 20201 year
- Setup of a Linux-based test environment using Docker for automated S7DOS online testing
- Design, development, and testing of an AWB plugin implemented with Angular for the S7DOS Cloud Connector
Web DevelopmentAngularTypeScriptDockerLinuxCI/CD
Nov 2016 - May 20177 months
Technical Content Development (Computer Science)
Studyflix GmbHNov 2016 - May 20177 months
- Creation of technical scripts and structured learning materials for computer science video content, including text, visuals, and supporting assets
- Provision of technical expertise in Java to support presenters and video editors during content production
JavaOOPData StructuresAlgorithms
Skills
Expert
Advanced
Intermediate
Familiar
Languages
German (native)
English (C2)
French
Programming Languages & Markup
C#
PowerShell
Java
C++
Python
Bash
TypeScript
JavaScript
HTML & CSS
PHP
SQL
C
Pascal
Backend & Databases
.NET
ASP.NET
Node.js
Entity Framework
Prisma
PostgreSQL
REST API
Web Services
SOAP API
DevOps & Infrastructure
Git
GitLab
GitHub
CI/CD
Linux
Docker
Windows Server
Cloud Services
Automation & RPA
UiPath
RPA Development
Process Automation
SAP RPA
Windows Automation
Web Automation
Linux Automation
Playwright
Power Automate
OpenRPA
Architecture & Development Practices
OOP
Software Architecture
System Design
System Integration
Design Patterns
Clean Code
Data Structures
Algorithms
Management & Consulting
CRM
Consulting
Tech Lead
Agile Methodologies
Scrum
Project Management
Workshop Facilitation
AI & Machine Learning
Intelligent Document Processing
TensorFlow
PyTorch
Neural Networks
Machine Learning Concepts
Agentic AI
Natural Language Processing
Computer Vision
IT Administration & Security
Server Administration
Active Directory
Infrastructure Security
Security Compliance
Azure Active Directory
Frontend & Web Frameworks
Next.js
React
Blazor
Angular
Vue.js
Symfony
Shopware
Game Development
Unity
2D Game Development
Photon Fusion 2
Multiplayer Networking
3D Game Development