Hi, I'm

Patrick Bußmann. Senior Full-Stack Developer

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

Get in touch My Services
patrick@bussmann-it — zsh

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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
Since 2015
Self-Employed
< 2h
Response Time

Services

Senior software development for businesses — from architecture to operations.

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.

Hosting & Operations

Dedicated root servers on Hetzner for project and business clients. Administration, monitoring and maintenance of your server infrastructure.

Private customer or local business?

PC & laptop repair, hardware upgrades with mail-in service, smart home and on-site help around Hildesheim/Hannover are available at Bußmann IT.

Visit bussmann.it

Clients

Companies and organizations across Germany and Austria I have worked with.

on-geo GmbH
Bilfinger SE
HubTime GmbH
Rockers.de
Inwerken AG
KTM AG
Fielmann AG
Gemeinde Algermissen
Delticom AG

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

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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