Hi, I'm Philip Frerk

Self-Employed Software Engineer

Specializing in .NET, Cloud Technologies & DevOps — with strong experience in financial software and the energy industry.

7+ Years Experience

Open to new project inquiries

Philip Frerk

About Me

Philip Frerk, M.Sc.

As a self-employed software engineer, I support companies with backend development, CI/CD, and cloud technologies — from architecture to production-ready delivery. Early on, I taught myself programming and later deepened my expertise during my computer science studies and through diverse client projects.

My focus is on clean code, solid software architecture, and sustainable, scalable solutions — delivered independently for clients across different industries.

Contact Details

Services

What I help clients with — from architecture to production.

Backend Development

Robust .NET/C# backends, APIs, and data layers — clean, maintainable, and built to scale.

Cloud & DevOps

CI/CD pipelines, containerization, and Kubernetes deployments — reliable delivery from commit to production.

Software Architecture

Domain-driven design and distributed systems — solid foundations for complex business domains.

Projects

Selected client projects from financial software, energy, and beyond.

Client Projects

Jan 2025 – Present

Billing Systems in the Energy Industry

Client / Industry Groß, Weber & Partner / Energy Industry

Development of billing systems as a distributed system for the settlement of electricity and gas contracts in Germany.

Technologies
C# SQL WCF Domain Driven Design Distributed Systems
Dec 2021 – Dec 2024

Invoice Receipt Processing

Client / Industry Diamant / Accounting

A distributed cloud application was developed for the automated capture and further processing of invoice documents. In addition, a frontend was implemented that allows users to correct errors detected by the system and provide feedback for training the AI components.

Technologies
C# .NET Docker Kubernetes Helm CI/CD TypeScript Angular Open Telekom Cloud MongoDB S3 Kafka
Aug 2020 – Nov 2021

AI Chatbot for Accounting Software

Client / Industry Diamant / Accounting

In close collaboration with a specialized AI team, a chatbot was developed that operates as a cloud-based application. The focus was on bringing software previously developed by data scientists into production.

Technologies
C# .NET Docker Kubernetes Helm CI/CD TypeScript Angular Open Telekom Cloud MongoDB Python Rasa
Aug 2019 – Jul 2020

Modernization of Business Reporting

Client / Industry Diamant / Accounting

Although Diamant Software already had a business reporting module, it was based on outdated technologies. The backend was rebuilt in C# and the frontend in Angular, with particular emphasis on frontend development and a solid architecture.

Technologies
C# .NET TypeScript Angular MS SQL
Apr 2018 – Apr 2019

Distributed Knowledge Graph Crawler

Client / Industry University of Paderborn / Data Science (Master's)

A crawler implemented as a distributed system that collects and stores knowledge graph data.

Technologies
Java Docker RDF Jena DB
Sep 2016 – Mar 2019

Employee On- & Offboarding Automation

Client / Industry dSPACE / Electronics

A tool was developed to automate internal employee on- and offboarding processes. Since dSPACE creates accounts in various internal tools for every new employee, this process was automated using the Admin Tool. The application was implemented as a classic desktop application using the Model-View-Controller pattern and the Eclipse Rich Client Platform.

Technologies
Java Maven Eclipse RCP MS SQL Stored Procedures

Education

2013 - 2019

University of Paderborn

Bachelor's and Master's degree in Computer Science

Get In Touch

Feel free to contact me! I am always open to new interesting projects and challenges.