Writing
What I learned building the thing, written down while it is still fresh enough to be honest about.
26 September 2026
Inside LifeDrop: How We Match Blood Donors on WhatsApp in Under 15 Minutes
When a hospital in Cameroon runs out of blood, the search falls on the family. Here is the clinical triage logic, ABO compatibility matrix, and automated WhatsApp dispatch engine behind LifeDrop.
- health-tech
- algorithms
- product
- Cameroon
- LifeDrop
25 September 2026
Resolving Google Apps Script "This App Is Blocked" When Deploying Web Apps
A step-by-step guide to bypassing Google's strict OAuth block by scoping manifests with @OnlyCurrentDoc and configuring container-bound scripts.
- google-apps-script
- web-dev
- troubleshooting
- bug-fix
22 September 2026
Production Reverse Proxying with Nginx and Automated SSL in Docker
Configuring hardened Nginx reverse proxy headers, rate-limiting rules, and certbot auto-renewals for containerised microservices.
- nginx
- docker
- devops
- ssl
20 September 2026
Debugging Offline-First SQLite Sync in React Native
Solving race conditions and schema migrations when syncing local SQLite databases with cloud endpoints on intermittent mobile networks.
- react-native
- sqlite
- offline-first
- bug-fix
14 August 2026
Bridging FHIR HL7 Clinical Records Over Low-Bandwidth WhatsApp Webhooks
How we map fast WhatsApp triage replies from rural health clinics into compliant FHIR Observation and Patient JSON resources without dropping clinical payload integrity on edge networks.
- health-tech
- fhir
- hl7
- interoperability
- typescript
29 July 2026
What 240 people taught me about health chatbots
Four months of running two WhatsApp health bots in Cameroon, and the one user behaviour that changed how I think about building them.
- health-tech
- AI
28 May 2026
Why Standard Floating-Point Arithmetic Kills in Pediatric Dosage: Building a Zero-Loss Decimal Engine
In adult nursing, a 0.05ml rounding error is negligible. In neonatal intensive care, it is fatal. Why JavaScript IEEE 754 floats fail clinical safety checks and how we wrote a deterministic dosage calculator in TypeScript and Python.
- clinical-nursing
- algorithms
- safety-critical
- typescript
- python
12 March 2026
Edge AI on Limbe's Coast: Deploying Quantized YOLO Models on $35 Hardware for Marine Plastic Tracking
Deploying heavy PyTorch models on battery-constrained Raspberry Pi 4 units in tropical humidity fails within hours. How CoastClear quantizes models into INT8 ONNX runtimes for real-time beach debris classification.
- edge-ai
- computer-vision
- onnx
- python
- CoastClear
20 November 2025
Notes from PyCon Cameroon 2026: Architecting Resilient Message Queues When the National Grid Blinks
When your server datacenter in Douala loses grid power twice a day, in-memory task queues disappear. Here is the Redis AOF persistence and Celery ACK acknowledgment pattern we presented at PyCon.
- python
- pycon
- celery
- redis
- distributed-systems
5 August 2025
Wrangling 14,000 Handwritten Ward Records: Lessons in Clinical Data Cleaning at COLTECH
Real medical data in Cameroon does not arrive in tidy Parquet files. It arrives as smudged paper ledger transcriptions with 19 different spellings of 'Typhoid'. How we built an automated fuzzy normalization pipeline.
- data-science
- coltech
- python
- nlp
- health-informatics
Published elsewhere
Writing for clients, through Inkwave. Some under my own name, some ghostwritten and credited here by agreement rather than by public byline.
Tech Chantier
Blog, under my own byline →DELC Foundation
Blog, ghostwritten →