About the Client
NexBank is a UK-based digital bank serving 500K+ customers with mobile-first banking, lending, and investment products.
The Challenge
Regulators flagged gaps in their security posture. They needed a full audit, penetration testing, and a real-time fraud detection system before their next FCA review.
The Solution
We conducted a comprehensive security audit, implemented zero-trust architecture, and deployed ML-powered fraud detection that analyzes transactions in under 50ms.
Key Features
Security Audit
Full infrastructure, application, and code-level security review
200+ vulnerabilities identified and patched
Real-time Fraud Detection
ML model analyzing transaction patterns in real-time
Blocked £4.2M in fraudulent transactions
Zero-Trust Architecture
Network segmentation and continuous authentication
Passed FCA audit with zero findings
Compliance Dashboard
Real-time compliance status across all regulations
Audit-ready at any moment
The Results
Passed FCA audit with zero findings. Blocked £4.2M in fraud in first quarter.
200+
Vulnerabilities patched
£4.2M
Fraud blocked
0
FCA audit findings
<50ms
Detection latency
Our Process
Audit
3 weeksPenetration testing, code review, infrastructure assessment
Architecture
2 weeksZero-trust design, network segmentation planning
Implementation
4 weeksSecurity hardening, fraud model training, dashboard
Validation
1 weekRed team exercise, compliance verification
"CiroStack turned our biggest regulatory risk into our strongest competitive advantage. The fraud detection system paid for itself in the first month."
James Whitfield
CISO, NexBank
What the Client Loved
- The depth of the audit report — nothing was overlooked
- Fraud detection ROI was immediate
- We were audit-ready within weeks
Challenges We Overcame
- Implementing zero-trust without disrupting live banking — phased rollout
- Training fraud models with limited historical data — synthetic data augmentation
Technology Stack
Security
AI/ML
Infrastructure
Monitoring
