Bettina Ballin – computer scientist (M.Sc.), freelance IT professional
I build websites, web applications, backends and integrations for companies that need a developer who also thinks about operations, security and data protection. More than five years in software development, systems integration and AI security research – and as a TÜV-certified security professional (T.I.S.P.) and external data protection officer, everything that comes after launch too.
From the first idea to secure operation. You get one person who builds, secures and documents – with nothing lost between agency, developer and consultant.
From a one-pager for a small business to a web application with login – fast, accessible and privacy-compliant from day one, including legal notice, privacy policy and hosting setup.
APIs, services and integrations that run reliably – in Java, Python or JavaScript, with proper documentation and tests.
Machine learning prototypes and data analyses that answer a concrete question – and an honest assessment of where AI adds nothing.
Security that lives in the architecture and the code rather than in a checklist – drawn from several years of AI security research at Fraunhofer SIT.
GDPR implementation that fits the product – on request as an appointed external data protection officer under Art. 37 GDPR.
Technology choices, architecture questions, a second opinion on quotes – and ongoing support so the project does not go stale after launch.
A selection – further references on request.
Website for a small business: concept, design, implementation and hosting setup – lean, fast and without tracking.
Research at Fraunhofer SIT: detecting anomalies in system data, vulnerability analyses of AI systems, publications on secure system design.
Tools for assessing the energy flexibility of industrial plants at PTW, TU Darmstadt: Python backend, web interface with Flask, Docker deployment.
Interfaces and API management for corporate clients on the webMethods platform – connecting ERP, CRM and line-of-business systems.
Smaller experiments and mini games live on GitHub.
This is how a project typically runs:
What should be built, what exists already, what are the budget and time constraints? The result is a short, readable quote – not a 40-page specification.
Show something that runs early, work in feedback, continue. Security and data protection are part of the work from the first line, not an afterthought.
Documentation, onboarding, all credentials in your hands. Afterwards, if you like: maintenance, further development or the role of external data protection officer.
Software development, websites, IT security; also external data protection officer for a SaaS company in the energy sector
Research on AI security and anomaly detection, vulnerability assessments, publications on secure system design
Focus on machine learning; tutor for first-year students
Systems integration and API management for corporate clients on the webMethods platform
Working student at PTW: energy flexibility tools in Python, web applications with Flask
I work where engineering, organisation and law meet – so the toolbox runs from the debugger to the GDPR.
Need a website, a backend, an integration or an AI prototype – or someone to put your existing system on a solid footing in terms of security and data protection? Send me a message. I usually reply within one working day.