Solving the hardest security problems in payments
since 2013.
Yinkozi works with the institutions where the consequences of failure are largest — tier-1 banks, payment providers, government bodies, hardware labs. Thirteen years of that fieldwork produced YinkoShield, our infrastructure layer for execution evidence.
Concentrated. Long-running. Rarely one-off.
Our engagements are deliberately small in number and deep in scope. Below: a glimpse of the shape of the work — sanitized to respect non-disclosure.
- 01Tier-1 bank · Multi-year, ongoing
Hardware-to-process security audit
Continuous coverage of every layer of the bank's surface — embedded firmware, mobile and web applications, network and identity, branch operations, internal process. Rotating multi-year scope rather than point-in-time.
- 02Government · Custom engineering build
DevSecOps automation at sovereign scale
Engineered the full security automation toolchain — CI/CD policy, scanning orchestration, threat-model integration, reporting. The customer's surface was too large and too sovereign for commercial SaaS to fit.
- 03Critical infrastructure · Massive scale
Portfolio-wide review where commercial tools fail
Global review of a critical-infrastructure portfolio across continents. Custom assessment methodology and tooling — the customer's footprint was beyond what off-the-shelf scanners can address.
A security engineering practice — and the product it built.
Three workstreams, one continuous body of work. The services and engineering that ship into customer environments are the same field that produced YinkoShield.
Where the consequences are largest.
We do not serve the long tail. Our customer base is small, deliberate, and concentrated in environments where security failures are existential.
Banks. Payments. Energy. Government. The places where a 4 am incident is not an inconvenience — it is the front page.
Multi-year engagements across Africa, Europe, North America.
Acquirers, processors, scheme-adjacent. Mobile, POS, SST estates.
National identity, payments, citizen-services. Sovereign posture.
Critical-infrastructure operators. SCADA and ICS exposure.
Mobile money, agent banking, device estates.
Device, terminal, embedded — the depth most consultancies do not maintain.
We build what we know.
Most security firms run a service-only business model. Yinkozi runs both — the engineering practice produces the product line. YinkoShield exists because thirteen years of fieldwork showed us where the gap was.
Every methodology has been pressure-tested in real production environments at tier-1 scale. We do not theorise.
We do not resell commercial tools. Where existing tooling is insufficient, we build. Several builds graduated into YinkoShield.
Customer data does not leave customer infrastructure. We support operator-side verification — not vendor-cloud dependency.
Working with the institutions where security must hold.
If your organisation operates payments, identity, or critical infrastructure at scale, we are open to a briefing.
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