What I do

Security and AI support for growing teams

I help companies strengthen security in a practical way by building foundations that protect their systems, customers, and reputation.

I also help teams implement AI systems with the right guardrails.

I have worked in regulated environments, including projects involving financial institutions and health applications, where security and delivery need to hold up under higher expectations.

What I help with

Services

Clear advice, practical support, and focused security work that helps your team reduce risk and build stronger habits across the organization.

Find what needs attention first

Assess your current security posture, identify the biggest gaps, and turn them into a realistic plan your team can follow.

Make your systems safer

Strengthen the technical foundations behind your product, from access controls to configuration, so common risks are reduced before they become incidents.

Put clear rules in place

Increase security maturity across the organization with policies, better decision-making frameworks, and clearer expectations for teams.

Review important changes

Evaluate new initiatives, vendors, workflows, or product changes with security in mind before they create avoidable risk.

Help set up fixes hands-on

Support implementation, not just recommendations, so improvements actually land across the organization.

Adopt and implement AI with the right guardrails

Review, design, and implement AI tools, workflows, and internal systems so teams can move faster without creating avoidable security, privacy, or governance risk.

Who I Am

About

I am a security engineer with 10+ years of experience across regulated environments. Most of my work has been inside financial services and healthcare where security needed to improve without slowing delivery down.

I have worked across payments, infrastructure, encryption, access control, security reviews, and hardening work. That includes roles at Belvo and N26, as well as independent consulting for companies that needed help finding risks and fixing them. I also deliver end-to-end software and security work in regulated environments across financial services and healthcare.

More recently, I have been leading AI hardening work and internal AI enablement. I also implement AI systems end-to-end when teams need hands-on support, with clearer guardrails, safer defaults, and better decision-making built in from the start.

01

Built payments and security foundations.

02

Worked on hardening projects and engineering security programs.

03

Leading AI hardening and secure adoption initiatives org-wide.

04

Experience across regulated environments, including financial services and healthcare.

Start here

Need help strengthening security or implementing AI?

Tell me what your team is building, what is worrying you, and where you need support.

hello@sergiodn.com