A customer wants answers
You have received a security or data-protection questionnaire.
Brían Diolún
SaaS & AI products | Sensitive-data software | Research-led teams
Someone's about to look hard at your product: a customer's security team, an investor, a hospital. I find what they'll find first, and help you fix it.
You have received a security or data-protection questionnaire.
Technical due diligence has started and you're not sure what they'll ask.
A clinical or regulated partner needs a DPIA, data map or technical answers.
You need clarity on its data boundary, governance or EU AI Act exposure.
A quickly built product now needs its access, deletion, retention and infrastructure checked.
Tell me what's going on and I'll tell you what I'd do. If you already know what needs building, skip the review.
Review
Product Readiness Review
You've got a deadline and a feeling something's not right, but you don't know what.
€1,200 fixed · 5 working days
Implement
Implementation Projects
You know what's broken. You need someone to fix it before the date.
From €2,500 for a focused project · larger projects quoted separately
Own
Fractional Technical Leadership
You don't have a CTO, and the technical calls keep landing on the founder.
€2,000 to €6,000/month · month to month
I'll tell you if you don't need me.
Recommendations
I had the privilege of working closely with Brían for more than seven years on a number of highly impactful digital health initiatives, including the MyUSE platform and the CommPAL/KareNua programmes. During that time, Brían consistently demonstrated an exceptional combination of technical expertise, professionalism, innovation, and teamwork.
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Brían is a truly outstanding full-stack software developer with the rare ability to move seamlessly from high-level architecture and system design through to the delivery of robust, scalable, production-ready solutions. His technical knowledge is extensive, and he has always remained at the forefront of emerging technologies, continuously identifying opportunities to improve both development processes and product outcomes.
One of Brían's particular strengths is his expertise in cloud infrastructure and services. He possesses deep knowledge of AWS and has successfully designed and managed complex deployments across multiple geographic regions and jurisdictions, always ensuring that security, compliance, reliability, and scalability remain central considerations.
What particularly distinguishes Brían is his commitment to quality. His documentation is consistently thorough, clear, and maintainable, making it easier for teams to collaborate effectively and ensuring the long-term sustainability of software projects. He approaches every challenge with diligence, attention to detail, and a strong sense of ownership.
More recently, Brían has demonstrated an impressive ability to integrate AI technologies into the software development lifecycle in a secure, safe, and innovative manner. He understands both the opportunities and responsibilities associated with AI-enabled development and brings a thoughtful, pragmatic approach to leveraging these technologies to enhance productivity and solution quality.
Beyond his technical capabilities, Brían is an exceptional colleague. He is approachable, dependable, and highly respected by everyone he works with. He communicates complex technical concepts clearly to both technical and non-technical stakeholders, collaborates effectively across multidisciplinary teams, and consistently contributes to a positive and supportive working environment. Just as importantly, Brían is genuinely great fun to work with. His positive attitude, sense of humour, and ability to build strong relationships make him a valued member of any team. He brings energy and enthusiasm to his work and helps create an environment where people enjoy collaborating and doing their best work.
Any organisation would be fortunate to have Brían on their team. He combines world-class technical skills with integrity, professionalism, and a genuine commitment to helping colleagues and projects succeed. I recommend him without hesitation and would welcome the opportunity to work with him again in the future!
Ciara Heavin
Professor, Department of Business Information Systems, Cork University Business School, University College Cork
Brían is a thoughtful, thorough and experienced engineering professional, with whom I had the pleasure of working over many years.
I am pleased to recommend him.
Culann mac Cabe
Head of Neurotechnology at Ozlo
About
Hi 👋 I'm Brían Diolún.
Over the past 11+ years, I've worked across healthcare, AI, education, and a variety of SaaS - often taking products from early concept through to production in environments where ethics, regulation, and trust matter.
My primary focus falls between engineering and compliance. I review how AI and sensitive-data products actually handle data, access and technical risk, then help teams turn the findings into work they can ship and verify.
This includes privacy-by-design controls, DPIA-ready documentation, access and retention models, AI governance readiness, and preparation for frameworks like the EU AI Act.

Brían Diolún
Connect on LinkedInNot ready to talk? Start with the free ten-minute readiness check or use the free privacy, data and AI templates.