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Case studies from production, with the numbers and how they were measured

From a regulator's audit to a factory floor to a client ledger. Clients are described by type. Each page covers the context and what it cost, the constraints, the build from 0 to 100, a system drawing, the safeguards, the results and what stayed behind.

DWG AC-101Live in production 10 daysfirst commit to live production
Accountancy firm: AI service line from zero, platform live in 10 days
An Irish chartered accountancy and audit firm offered no AI. Adrian built the service line and runs it: a 20-module client platform live in 10 days, EU-only AI processing enforced in code, an AML gate, Irish statute as software, and AI training for the whole firm.M.A. Whately & Co., Irish chartered accountancy and audit firm 99.8%AI bills field accuracy, synthetic test corpus Stack: TypeScript, Vercel, Supabase (PostgreSQL, RLS), Gemini via Vertex AI EU
Data path
1. Client uploads a bill or receipt
2. Two EU-hosted models extract every field and must agree
3. VAT number checked against VIES
4. Bill drafted in Xero for review
5. Approved payments exported as a SEPA file
Case 01 / 07Read case
DWG AC-102Licensed ECSP operator Mar 2024ECSP licence granted by the ASF
HighCrowd: EU crowdfunding licence, as COO
Three years as COO of a regulated real-estate crowdfunding platform. Adrian was the lead on the authorisation and audit with the ASF, built automated KYC and AML onboarding and the investor-protection flows, and the platform received its EU crowdfunding (ECSP) licence in March 2024.HighCrowd, real-estate crowdfunding platform for retail investors 45 to 8minutes to onboard an investor Stack: ECSP, Regulation (EU) 2020/1503, LemonWay (PSD2), KYC and AML, Penetration testing
Data path
1. Investor registers
2. Identity and AML checks at the payment partner
3. Entry knowledge test and loss-bearing simulation
4. Key investment information sheet and reflection period
5. Investment through segregated fund flows
Case 02 / 07Read case
DWG AC-103Operating and growing x65turnover in three years, 57% net margin
3Descu: factory, platform and MCP server
A 0-to-100 story. An EU start-up grant and 5 printers in 2022; today an ISO 9001:2015 certified company with 200+ printers, buyers in 26 of the 27 EU member states, a 57% net margin with no outside equity, its own quoting platform in four languages, and one of the first manufacturing MCP servers.3Descu (TREIDESCUPRINT SRL), on-demand 3D printing for engineering buyers 200+printers, from 5 in an apartment Stack: React, TypeScript, Supabase (PostgreSQL, Edge Functions), Stripe
Data path
1. Engineer uploads a CAD file, or asks an AI assistant
2. Mesh analysed in the browser
3. Price from the calibrated pricing engine
4. Payment and order confirmation
5. Production, shipping and portal tracking
Case 03 / 07Read case
DWG AC-104Live in production 3 entities4 currencies, live since April 2026
HubSpot to Xero, multi-entity invoicing
Automation that moves real money: closed deals become approved Xero invoices in the right legal entity and currency, emailed to the customer and chased until paid. Live since April 2026, about 52 invoices a month under signed approvals.Multi-entity B2B software reseller (US, UK and EU companies), delivered through M.A. Whately & Co. 212+invoices processed by September 2026 Stack: n8n, HubSpot API, Xero API (3 tenants, OAuth2), Supabase (PostgreSQL)
Data path
1. Deal marked Closed Won in HubSpot
2. Routed to the right legal entity and currency
3. Draft invoice created in that Xero organisation
4. Finance approves through a signed link
5. Customer emailed, then reminded until paid
Case 04 / 07Read case
DWG AC-105Reporting checked live on demo data 5/5isolation policies caught by mutation tests
EU-sovereign financial reporting platform
An EU-sovereign financial reporting platform with no US-owned service in the stack: self-hosted in the Netherlands, Microsoft sign-in, Exact Online ledgers turned into board-ready reports for education organisations, and tenant isolation proven by tests.Dutch education-sector finance platform 52/52sign-in end-to-end tests pass Stack: Next.js 15, Supabase (self-hosted PostgreSQL, RLS), n8n (self-hosted), Docker Compose
Data path
1. Ledger data read from Exact Online
2. Synced into each tenant's isolated space
3. Structured by the client's chart-of-accounts workbook
4. Reports with drill-down to transactions
5. Plain-language explanation for the board
Case 05 / 07Read case
DWG AC-106Live 107/107match against the bookkeeper's manual entries
Tour-operator Xero prepayments, 107/107
Supplier bills read, coded and moved from prepayments to expense by arrival month, as draft journals the bookkeeper approves. Matched the bookkeeper's own entries 107 of 107 before go-live.Irish tour operator, delivered through M.A. Whately & Co. 10/10daily production runs green Stack: Python 3.12, Xero Accounting API (OAuth2), GitHub Actions, pypdf
Data path
1. Supplier bill arrives in Xero
2. Fields read and VAT arithmetic checked
3. Reference and description written to the bill
4. Draft prepayment journal updated by arrival month
5. Bookkeeper reviews and posts at month end
Case 06 / 07Read case
DWG AC-107Delivered 5 hotelsmatched to accounting, cell by cell
5-hotel daily revenue reporting
Six daily reports for five hotels, built from the property-management and point-of-sale exports and matched to the accounting team's own figures, cell by cell, for every hotel.Hospitality group operating in Spain and Romania 100%point-of-sale match on three test days Stack: Python, n8n, Google Cloud Run, Google Cloud Storage
Data path
1. Property and point-of-sale exports arrive by email
2. Pipeline checks every expected document is present
3. Source rules applied row by row
4. Reports written into the accounting templates
5. Accountants review; missing inputs raise an alert
Case 07 / 07Read case

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