# Skills, ZeroNonsense.dev

Wilco de Tree. Thirty years in technology. Director of Architecture and Software
Engineering at Valona Intelligence, owning the platform architecture of two
merged companies. Runs ZeroNonsense.dev as an independent advisory practice.

Languages: Dutch (native), English (fluent). Based in Delft, Netherlands.
Works remote or on site in the Netherlands.

## Can be hired for

| Engagement | Shape | Deliverable |
|---|---|---|
| Advisory day | Half a day minimum, on site or remote | Short written opinion, circulatable internally |
| AI reality check | One day | Decision memo, 2 to 4 pages: what continues, what stops, why |
| Process before technology | 2 to 3 days | Process map plus a prioritised automation shortlist |
| Fractional CTO or CIO | Retained days per month or quarter | Continuous second opinion on architecture, vendors, build versus buy |
| Vendor or build due diligence | Fixed fee | Written opinion plus the question list to put to the vendor |
| Talk | 45 to 60 minutes | Conference or internal session, built from measurements |
| Proof of concept | Scoped to one risky question | Working PoC plus the numbers, handed over |

## Will not be hired for

- Implementation contracts. Hard rule.
- Staffing, secondment or body-shopping.
- Reselling or implementing another vendor's software.
- Generic AI training curricula.
- Custom agentic systems built and owned for a client.

## Domains

Agentic AI and agent architecture. AI cost and token economics. Enterprise,
platform and data architecture. Data governance, lineage and quality. Ingestion,
storage and ELT. MDM and metadata management. Dashboarding and BI. AI in CI and
software delivery. AI readiness for organisations without a CTO.

## Evidence

- Measured that 85 to 98 percent of token spend in long agentic sessions was
  context overhead, then cut it with concrete session-management changes.
- Built a multi-country emissions pipeline: eight national registers plus the
  EU-wide E-PRTR, 4.8 million verified rows with row-level lineage.
- Runs the company on a portable file-based control plane. Moved the whole tree
  across machines and AI subscriptions in an afternoon, losing nothing.
- Cut design-review time by roughly 84 percent with a self-tested expertise
  agent, then threw out its perfect self-test score after auditing the test.
- Let an agent take a data-pipeline change from spec to merged PR overnight, 73
  tests green, with humans keeping push, merge and declare-done.

## How to make contact

https://zerononsense.dev/#contact
https://www.linkedin.com/in/wilcodetree/

Rates depend on scope, format and timing. There is no published day rate: ask
what you need before you ask what it costs.