Brían Diolún

Ready to launch,
scale or seek investment?

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.

Products I've built

CommPALmyuseAudio Rhoon

You may be here because…

A customer wants answers

You have received a security or data-protection questionnaire.

An investor is looking closely

Technical due diligence has started and you're not sure what they'll ask.

A pilot needs documentation

A clinical or regulated partner needs a DPIA, data map or technical answers.

An AI feature raises questions

You need clarity on its data boundary, governance or EU AI Act exposure.

Real users are arriving

A quickly built product now needs its access, deletion, retention and infrastructure checked.

How I help

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

Find the material blockers

Product Readiness Review

You've got a deadline and a feeling something's not right, but you don't know what.

  • Prioritised material risks
  • A shareable summary
  • A practical 30-day plan

€1,200 fixed · 5 working days

Implement

Deliver a defined outcome

Implementation Projects

You know what's broken. You need someone to fix it before the date.

  • Controls and engineering changes
  • DPIA-ready technical evidence
  • Verification and a clear end state

From €2,500 for a focused project · larger projects quoted separately

Own

Add continuing ownership

Fractional Technical Leadership

You don't have a CTO, and the technical calls keep landing on the founder.

  • Architecture and product decisions owned
  • Delivery and suppliers kept aligned
  • Diligence questions handled

€2,000 to €6,000/month · month to month

Book a free fit call

I'll tell you if you don't need me.

Selected work

CommPAL

CommPAL

Founding Engineer, Privacy & Compliance, UI/UX

Cross-region healthcare platform with AI triage, patient tracking, and privacy-aware operational workflows.

HealthcareAICloudGDPRSaaSML
MyUSE

MyUSE

Lead Developer, Privacy & Compliance, Product Design

MyUSE is a privacy-first web and mobile platform for university drug harm-reduction, combining accessible UX & structured content.

AWSLaravelReactPrivacy By DesignGDPRUniversity Spin-Outs
AudioRhoon

AudioRhoon

Lead iOS Developer

Developed Bluetooth-connected assistive technology applications for respiratory and speech therapy devices, covering delivery, deployment, and ongoing product support. I managed a range of 10+ apps, each presenting a game used by people with a wide range of disabilities to increase their quality of life.

Digital HealthiOSBluetoothAssistive Tech

Recommendations

What people say

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.

Read full recommendation

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

Brían Diolún

Connect on LinkedIn
Product Readiness ReviewImplementation ProjectsFractional Technical LeadershipPrivacy EngineeringGDPRDPIAEU AI ActAI GovernanceHealthcare SoftwareMedTechSaaSCloud & DevOps

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