Thomas Karner
Services
From the first idea to running in production: I support your project personally, all from a single source.
Custom software development
Creation of secure and maintainable web applications, APIs and backend systems. From concept to operation.
- Java
- Go
- TypeScript
- PostgreSQL
The challenge
Off-the-shelf software doesn't fit your processes, or an existing application has become hard to maintain.
What I do
- Requirements analysis and software architecture
- Development of web applications, APIs and services
- Modernisation and replacement of legacy systems
- Code quality: tests, reviews and refactoring
- Operation, maintenance and further development
Digitalising business processes
Understanding workflows, digitalising them sensibly and replacing paper, spreadsheets and manual steps with end-to-end processes is information systems management in practice.
- Information Systems Management
- Automation
- APIs
The challenge
Recurring tasks eat up time, data is scattered across e-mails, spreadsheets and folders – and nobody has the whole process in view.
What I do
- Analysis of your business processes
- Automation of recurring tasks
- Integration of existing systems via APIs
- Targeted use of AI, for example for searching documents
PDF/A & long-term archiving
Validation, conversion and archiving of documents as PDF/A – built on my own open-source Go library.
- PDF/A
- Go
- Archiving
The challenge
Documents must remain readable and legally compliant for decades, and existing tools are slow or hard to integrate.
What I do
- Integrating PDF/A validation and conversion into your systems
- Deploying and extending gopdfrab (Go, CLI, WebAssembly)
- Commercial gopdfrab licence for closed-source products, including support
- Advice on archiving requirements
- Analysis of problematic document collections
Frequently asked questions
How much does a project cost?
It depends on the scope. After a free initial call you get a transparent quote – either a fixed price or time and materials, depending on the project.
Do you work remotely?
Yes. Software projects and consulting are mostly remote. On site I mainly work in Vienna and the surrounding area.
Who do you work for?
Small and medium-sized businesses as well as software teams that need extra capacity or specialist knowledge, for example on PDF/A.
Do you also handle maintenance and operations?
Yes. I support projects from design and development through to operation and further development.
Let's talk about your project.
In a free initial call we clarify what you need and how I can help – no strings attached.