ELETECH Solutions
Insights

Notes from systems we shipped.

Notes published
3
Topics covered
7

Written up because the constraint was interesting, not to hit a publishing schedule. Everything here comes out of work we delivered.

Latest note

7 min read

Multi-tenant when every tenant wants a different schema

Serving many schools from one platform means no two of them track the same fields — and the permission model has to follow relationships, not role names.

  • SaaS
  • Multi-tenancy
  • Access Control
Read the note

In this note

  1. 01Dynamic entities instead of migrations
  2. 02Roles are not the permission model

Every school we onboarded wanted to track something the last one did not. House colours. Bus routes. A second guardian with different pickup rights. Individually trivial; collectively, the thing that turns one product into a fork per client.

Earlier notes

  1. 5 min read

    Offline-first is an architecture, not a feature

    You cannot add offline support at the end. It decides where your data lives and who is allowed to be authoritative — which means it decides almost everything.

    • Architecture
    • Offline-First
  2. 6 min read

    Enforcing quotas on a 10 kbps link

    When the connection is too slow and too intermittent to ask permission, the decision has to move to the device. What that changes about the rest of the system.

    • Edge
    • IoT
    • Architecture
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