Engineering notes
Clear, evidence-led case studies from Mapify, Henri, AxIT and Aimi—how a vague requirement became a concrete problem, which trade-offs shaped the architecture, where AI accelerated the work, what changed in production and what I would carry into the next system.
11 articles · newest first
Mapify · Henri · AxIT · Architecture map
The operating system around the coding agent
How I moved from Cursor pairing to Claude Code and Codex agent teams by treating AI as a capable engineering team member: explicit behaviour, architecture, design rules, reusable workflows and evidence—not prompts alone.
AxIT · Architecture map
One quality system, two different questions
How I designed a two-phase quality process: AxLib focuses scarce domain-expert time on production-sample evidence and version differences, then SBN Testing lets app testers validate exact-build behaviour without rechecking the maths. Developers fix reported bugs while that testing continues, instead of waiting for a finished pass to be handed over.
AxIT · Architecture map
One recording, one meaning, three places it is used
How raw AxIT force traces become consistent metrics across mobile, controlled backend backfills, benchmark generation and browser-based algorithm review.
Mapify · Henri · AxIT · Architecture map
From a likely fix to a reproducible debugging loop
How I evolved AI-assisted debugging from code inspection and likely fixes into a reproducible workflow: exact bug data, real product paths, layered observability, regression tests, computer-use verification and physical-device evidence where the boundary requires it.
Henri · Architecture map
One lesson, asked in a way the app can trust
The tools, provider chain and API call behind one Henri lesson: a quiz, a chapter move and a picture travel with the conversation, and the next provider can answer when the first one does not.
Mapify · Architecture map
Search the ideas without making people wait for a migration
How I designed full-text mind-map search and moved index ownership from S3 to PostgreSQL with fallback, background migration and user-transparent rollout.
Mapify · Measured change
Measured before and after
A performance and reliability programme spanning web vitals, streaming memory leaks, embedding memory and Prometheus monitoring.
Mapify · Architecture map
One message, two questions before it leaves
Newsletters and account notifications leave from two domains. Each language and audience has its own list, and a template engine replaced a day of hand-built email.
Mapify · Architecture map
From a spreadsheet to a settlement record
Affiliate settlement used to be a shared Excel sheet. I replaced it with four records and a job that settles a paid invoice after seven days, unless a staff member has already changed it.
Mapify · Architecture map
Many ways in, one mind map out
Mind-map generation lived in the browser page. I moved that work into one shared generator so the website, the backend and automation produce the same map, including when no page is open. The move took more than a month.
Aimi · Outcome snapshot
Outcomes that travelled with the architecture
How I led Aimi’s shared playback architecture, founded the Android team and improved startup performance while keeping quality measurable.