Cybersecurity for businesses

Business decisions,
backed by solid technical evidence.

I help businesses close security gaps before they become a problem, with audits, pentesting and incident response backed by documented methodology.

Available now Remote service, all of Spain 24h response
€400–€4,500
Cost of a preventive audit
€100,000+
Average cost of an incident for an SME (INCIBE)
1–4 weeks
Timeline depending on service scope
100%
Fixed quote, no surprises
The real risk

Most companies discover their vulnerabilities when it's already too late

65% of serious incidents in Spanish SMEs happen on systems with already-known, avoidable vulnerabilities.

🛡️
Do you know what a real attacker could see in your system today?

Most vulnerabilities exploited in real incidents had been exposed for months before anyone noticed. I see it constantly in audits.

🔓

Unauthorized access

Forms, admin panels or APIs without proper protection, open to anyone.

📂

Exposed data

Customer information accessible due to a simple server misconfiguration.

⚖️

GDPR non-compliance

Fines of up to €20 million for lack of adequate technical measures.

🦠

Silent malware

Malicious code installed on your site, stealing data without anyone noticing.

📉

Compromised reputation

A public incident can destroy customer trust within days.

🔑

Leaked passwords & credentials

Reused or previously breached credentials, the most common entry point.

Services

What I can do for your business

Competitive, transparent pricing, without the overhead of a large consultancy. Fixed quote before starting, always. Prices excl. VAT.

See full details for each service →
How I work

Simple, transparent, actionable

1

Free consultation

Tell me about your situation by email or video call. I assess feasibility at no cost.

2

Fixed quote

You receive a proposal with a fixed price, scope and timeline. No surprises later.

3

Technical work

Manual analysis using professional tools and internationally recognized methodology.

4

Report + support

Delivered within the agreed timeline. Technical and executive versions. Post-delivery support included.

About me

Nieves Casquero

Offensive security specialist based in La Línea de la Concepción, available remotely across Spain.

Active vulnerability hunter on HackerOne and Bugcrowd — the same technical rigor I apply to every audit.

See my full background →

Verifiable activity

LinkedInNieves Casquero1,027 followers · 500+ connections
Instagram@nieves.casqueroActive
FacebookNieves CasqueroActive
CoverageAll of SpainRemote
Blog

Resources for businesses

Practical cybersecurity articles, without unnecessary jargon.

Public Tenders

Cybersecurity and GDPR requirements in Spanish public tenders

What cybersecurity, GDPR and ENS clauses actually appear in Spanish municipal tenders, with real examples.

Read article →
Incident Response

What to do in the first hours after a security incident

The steps that make the difference between containing an incident and letting it become a crisis.

Read article →
Web Security · Business

When does your business need a web security audit?

The warning signs that your website has vulnerabilities you don't know about — and what to do before an attacker finds them.

Read article →
Digital Forensics

Why you should preserve digital evidence after an incident

The logs, screenshots and access records that disappear in the first hours — and why acting fast changes everything.

Read article →
FAQ

Before you write in, this might already answer it

Why hire a freelancer instead of a big consultancy?

No sales layers or middle management: you talk to me from the first email through report delivery, which means a tighter price without losing technical rigor.

How is confidentiality of my data guaranteed?

We sign an NDA before any work begins. All findings and evidence are handled under GDPR and deleted at project close if you request it.

What if you don't find any vulnerabilities?

You still receive a report with the methodology applied and scope covered — useful as evidence of due diligence for clients, insurers or compliance audits.

When and how do I pay?

Typically 50% when confirming the engagement and 50% on report delivery. For smaller projects, a single payment on delivery. No surprises: the price is fixed before starting.

Do you only work in Cádiz, or across Spain?

100% remote across Spain. The initial consultation and results presentation are done by video call, no travel required.

Do you also fix the vulnerabilities you find?

The service covers detecting, documenting and prioritizing. Your technical team implements the fix, but I can support the process and validate that the fix closes the issue.

Contact

Do you have a business or website to protect?

First consultation free, by video call or email, no obligation. Tell me about your situation and I'll tell you exactly what I can do and how much it would cost.