Sheet 01 / 04Four patterns · no client names

Engagement patterns

The shape of the work.

Four patterns most engagements follow. As delivered systems go live, this page becomes case studies — written with the client, or not at all.

No client names, no invented outcome figures, no testimonials. What follows is the structure of the work, drawn rather than described.

Sheet 02 / 04Four patterns

01
Pillars 01 / 03
The operational core
ERP, CRM, and BI for a business run on spreadsheets and tribal knowledge.
Commercial model
Fixed price against written spec
Representative stack
Postgres · TypeScript · Next.js · .NET
Read the pattern
Fig. 01 — The lattice, collapsed into one record
Fixed price against written spec
02
Pillar 02
The customer-facing replatform
Commerce or portal rebuilds where revenue can't pause during migration.
Commercial model
Fixed price against written spec
Representative stack
Next.js · TypeScript · Postgres · Redis
Read the pattern
Fig. 02 — Strangler cutover, route by route
Fixed price against written spec
03
Pillar 03
The modernization
Moving off a legacy system the business can't afford to stop.
Commercial model
Fixed-fee discovery, then fixed price per phase
Representative stack
Go · Postgres · Kafka · Terraform
Read the pattern
Fig. 03 — Fenced, then extracted one phase at a time
Fixed-fee discovery, then fixed price per phase
04
Pillar 04
The AI question
"Should we build this AI thing?" — the engagement where discovery most often ends in don't.
Commercial model
Fixed-fee discovery, then fixed price if building
Representative stack
Python · PyTorch · LangChain · pgvector
Read the pattern
Fig. 04 — Two exits, one fee
Fixed-fee discovery, then fixed price if building

Rusted metal curves forming an abstract interior — Fig. 03 — Every pattern runs the same five gatesSheet 03 / 04

Next — Start with discovery

Bring us the raw idea

Discovery is a fixed fee. The recommendation is honest — even when it's “don't build.”

Start discovery

info@archxoft.com

What follows

01: Reply within 2 business days
02: 45-min scoping call
03: Fixed discovery quote