Hi, I'm

Patrick Bußmann. Senior Full-Stack Developer

Q: What services does Patrick Bußmann offer as a freelancer?

Senior full-stack development with C#/.NET, PHP/Symfony, React, TypeScript, Angular and Node.js. Plus cloud & DevOps (Azure, AWS, Hetzner, Docker, Kubernetes), AI-enhanced development (Claude, ChatGPT, Copilot, local LLMs for sensitive data), microservice architectures, test automation with Playwright and Robot Framework, IT consulting and modernization of legacy systems.

Q: What does it cost? What's the hourly rate?

Current freelance rate is €90/hour all-in (as of 04/2026). For long-term engagements or fixed-price projects there are individual terms — best to inquire directly.

Q: What does Patrick's availability look like?

Availability for new projects is discussed individually — best to inquire briefly by email or phone. Average response time on inquiries is under 2 hours.

Q: Which clients and industries has Patrick worked with?

Enterprise clients include Fielmann, KTM, Bilfinger SE (modernization of internal time tracking with React + TypeScript frontend and Node.js/Express/TypeORM backend), on-geo GmbH, Inwerken AG. Plus public sector (Gemeinde Algermissen) and co-founder of HubTime GmbH (fully automated booking system).

Q: Does Patrick work remotely or on-site?

Primarily remote across the DACH region. On-site by arrangement, especially around Hildesheim/Hannover. Based in Algermissen, Lower Saxony, Germany.

Q: Which technologies are NOT taken on?

Currently no Java, Kotlin or Delphi projects. Pure design or marketing tasks don't fit the profile either — there are better specialists for that.

Q: Who helps with private PC issues, smart home or hardware upgrades?

That's covered by the sister offering bussmann.it — IT services for private and SMB customers around Hildesheim/Hannover plus a Germany-wide mail-in service for SSD and RAM upgrades.

> Senior Full-Stack Developer

> AI-Enhanced Development

> Cloud & Microservice Architect

I build scalable web applications and microservice architectures — accelerated by AI, backed by experience.

Get in touch My Services

About Me

I started coding at age 12 — out of pure curiosity. Since 2015, I've been self-employed, helping businesses of all sizes build modern software solutions. My passion: simplifying, modernizing and automating things — whether with code, AI tools or smart home technology.

In 2024, I co-founded HubTime GmbH — a fully automated booking system with 24/7 access and PIN generation.

15+

Years Experience

10+

Enterprise Projects

100%

AI-Enhanced

< 2h

Response Time

Services

From enterprise software development to PC repair — I help you get the most out of your technology.

Full-Stack Development

Web applications and microservice architectures in PHP/Symfony, C#/.NET, React and TypeScript. From concept to deployment.

AI Integration & Automation

Accelerated development with Claude, ChatGPT and Copilot. Privacy-compliant with local LLMs for sensitive projects. Workflow optimization for your business.

Cloud & DevOps

Cloud infrastructure on Azure and AWS. Containers with Docker and Kubernetes. CI/CD pipelines and automated deployments.

IT Consulting

Analysis and optimization of your workflows. Digital transformation and process automation — also for small businesses.

Web Hosting

Dedicated root servers on Hetzner. Administration, monitoring and maintenance of your server infrastructure.

PC & Laptop Repair

Diagnostics, repair and data recovery for private customers. Quick help with hardware and software problems.

Hardware Upgrades

SSD and RAM upgrades for PC and laptop. Send-in service: you ship your device, I upgrade it and send it back.

Request a quote →

Clients

Trusted by companies and organizations across Germany and Austria.

on-geo GmbH

Completed

Full-Stack Development

02/2025 – 04/2026

Full-Stack

Bilfinger SE

Completed

Modernization of the internal time-tracking software for employees — replacing the legacy application, introducing TypeScript on the frontend and building / extending the test suite. Backend with Node.js, Express and TypeORM.

06/2025 – 12/2025

React TypeScript Node.js Express TypeORM Playwright

HubTime GmbH

Co-founded

Co-founded — Fully automated booking system with 24/7 access and PIN generation

02/2024 – present

Co-Founder Full-Stack Automation

Rockers.de

Current

Web hosting & dedicated root servers on Hetzner

01/2024 – present

Hosting Hetzner DevOps

Inwerken AG

Current

Ongoing maintenance and continued development of websites: WordPress upkeep, Matomo tracking setup & analysis, plus integration of interactive 3D visualizations using Govie.

12/2023 – present

WordPress PHP Matomo Analytics Govie 3D HTML/CSS/JavaScript

KTM AG

Completed

Microservice architecture in C#/.NET, Azure Cloud, Kubernetes

01/2022 – 12/2024

C# .NET Azure Kubernetes Microservices

Fielmann AG

Completed

Payment systems in C#, React, AWS

07/2021 – 12/2021

C# React AWS Payment

Gemeinde Algermissen

Current

IT support & web development

09/2019 – present

Web IT Support Public Sector

Delticom AG

Completed

First Amazon Pay Alexa Skill in Germany (ReifenDirekt)

08/2018 – 04/2019

TypeScript Alexa Amazon Pay DynamoDB

Tech Stack

My current tech stack — constantly growing, AI-enhanced.

Languages

PHP C# TypeScript JavaScript HTML5 CSS3 SQL

Frameworks

.NET ASP.NET Core Entity Framework Core Symfony Laravel Angular React Node.js Express NestJS TypeORM Astro

Cloud & DevOps

Microsoft Azure Azure Kubernetes Service (AKS) Azure OpenAI Azure Service Bus Azure SQL Amazon AWS AWS Lambda AWS DynamoDB AWS S3 AWS Cognito Docker Kubernetes GitHub Actions GitLab CI Azure DevOps Pipelines (YAML) Hetzner

AI Tools

Azure OpenAI OpenAI API Anthropic / Claude API Claude ChatGPT GitHub Copilot Ollama Local LLMs RAG Embeddings Prompt Engineering

Databases

PostgreSQL MySQL SQL Server Redis DynamoDB

Testing & QA

Playwright Selenium Robot Framework PHPUnit

Tools & IDEs

Rider PhpStorm WebStorm VS Code Git Raspberry Pi Shelly

Hardware Upgrade Configurator

Select your device and desired upgrades — I'll take care of the rest.

Device Type

SSD Upgrade

RAM Upgrade

Estimated Price

—

Request a quote

Prices are estimates. Final quote after inspection of your device.

Frequently Asked Questions

Answers to the most common questions — from rates and tech stack to availability.

What services does Patrick Bußmann offer as a freelancer?

Senior full-stack development with C#/.NET, PHP/Symfony, React, TypeScript, Angular and Node.js. Plus cloud & DevOps (Azure, AWS, Hetzner, Docker, Kubernetes), AI-enhanced development (Claude, ChatGPT, Copilot, local LLMs for sensitive data), microservice architectures, test automation with Playwright and Robot Framework, IT consulting and modernization of legacy systems.

What does it cost? What's the hourly rate?

Current freelance rate is €90/hour all-in (as of 04/2026). For long-term engagements or fixed-price projects there are individual terms — best to inquire directly.

What does Patrick's availability look like?

Availability for new projects is discussed individually — best to inquire briefly by email or phone. Average response time on inquiries is under 2 hours.

Which clients and industries has Patrick worked with?

Enterprise clients include Fielmann, KTM, Bilfinger SE (modernization of internal time tracking with React + TypeScript frontend and Node.js/Express/TypeORM backend), on-geo GmbH, Inwerken AG. Plus public sector (Gemeinde Algermissen) and co-founder of HubTime GmbH (fully automated booking system).

Does Patrick work remotely or on-site?

Primarily remote across the DACH region. On-site by arrangement, especially around Hildesheim/Hannover. Based in Algermissen, Lower Saxony, Germany.

Which technologies are NOT taken on?

Currently no Java, Kotlin or Delphi projects. Pure design or marketing tasks don't fit the profile either — there are better specialists for that.

Who helps with private PC issues, smart home or hardware upgrades?

That's covered by the sister offering bussmann.it — IT services for private and SMB customers around Hildesheim/Hannover plus a Germany-wide mail-in service for SSD and RAM upgrades.

Contact

Interested in working together? I'd love to hear from you!

Or email me directly:

patrick.bussmann@bussmann-it.de

Average response time: 2 hours

Algermissen, Lower Saxony

Remote & on-site (Hanover, Hamburg, Berlin, Munich, Stuttgart)

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