Dennis Pfeifer
Founder of AISuccessful. System Engineer, Cloud Engineer and IT Consultant with over 15 years of experience.
My IT journey started early -- at age 12, I began trying everything I could get my hands on. Curiosity turned into first projects: websites, small server infrastructures, file servers and Windows domains for local businesses.
After graduating with a focus on computer science, I deliberately chose the practical route: training as an IT specialist for system integration. This was followed by five intensive years as a System Engineer and Cloud Engineer -- building infrastructures, leading teams, executing cloud migrations.
Today I hold a senior IT position at Vizona GmbH while building AISuccessful in parallel. My focus: microservices for mid-market businesses and automating manual tasks across industries.
I work full-stack -- in every sense: Windows, Linux, AWS, Azure, containers, networks, software development, consulting, management. This breadth helps me develop solutions that actually work.
Career Path
First Steps in IT
Curiosity sparked. Tried everything, started first small projects.
Websites & Server Infrastructure
Built websites, set up file servers, configured Windows domains for small businesses.
IT Specialist for System Integration
After graduating with a focus on computer science, laid the practical foundation.
System & Cloud Engineer
Built enterprise infrastructures, executed cloud migrations, led teams.
AISuccessful & IT Leadership
Senior IT position at Vizona GmbH. Building AISuccessful in parallel.
Skills
Operating Systems
- Windows Server
- Linux
Cloud
- Azure
- AWS
Development
- Python
- TypeScript
- Node.js
DevOps
- Docker
- Terraform
- CI/CD
Infrastructure
- Networks
- Active Directory
Leadership
- IT Management
- Consulting
Values
Pragmatic
What works is what counts. No technology for technology's sake.
Holistic
From strategy to implementation. Full-stack in every sense.
Reliable
Clear commitments that are kept. No empty promises.
Mid-Market Focused
Understanding the reality of mid-market businesses and delivering tailored solutions.
Current Focus
Microservices and AI automation for mid-market businesses.
My goal: help businesses automate manual tasks and free up time for what truly matters. With modern technologies, pragmatic solutions and a clear focus on real-world value.
Frequently Asked Questions
Answers to the most common questions about me and how I work.
Why is the company based in Estonia?
Estonia offers fully digital company formation and administration through its e-Residency program. All administrative processes run online — ideal for a location-independent IT company. Clients are primarily based in the DACH region (Germany, Austria, Switzerland).
Do you work alone or with a team?
I work as a solo consultant and bring in specialized freelancers as needed. This keeps overhead low and communication direct. For larger projects, I assemble a tailored team.
Which industries do you serve?
Primarily mid-market businesses in the DACH region — across industries. Past projects span retail, logistics, manufacturing, and services. The methods and technologies are industry-agnostic.
How do you differ from large IT service providers?
Speed and direct contact. No project management overhead, no long approval chains. You always speak directly with the developer. Projects start within days, not months.