The Evidence

Professional Portrait — The Nurse Who Codes

Official portrait of Chifen Sama Nduma, software engineer and registered nurse, Buea, South West Region, Cameroon.

Field Engagement & Regional Overview

Chifen in the field exploring terrain and rural infrastructure conditions in the South West Region of Cameroon.

Research Context & Rural Clinical Exploration

Grounding technology design within local geographic and environmental realities in the South West Region.

Ayodah Blood Donor Search Interface

The Ayodah mobile web search portal displaying donor matching by blood group across participating hospitals in Cameroon.

✓ From operational Ayodah server deployment (2021).

The Ayodah Mobile App on Android Home Screen

Ayodah app installed on an Android device: "The app that won a national challenge and died at the install screen, leading directly to WhatsApp-first LifeDrop."

Clinical Data Modelling — Maternal Health Risk Distribution

Figure 1: Risk level distribution across 1,014 maternal clinical records, analyzing low, mid, and high maternal complications using machine learning classifiers.

✓ Generated from validated scikit-learn risk pipeline evaluation.

Blood Sugar Histogram & Pregnancy Complications

Figure 4: Histogram distribution of maternal blood sugar readings across gestational stages, identifying critical pre-eclamptic risk thresholds.

Clinical Feature Correlation Heatmap

Figure 5: Correlation matrix across maternal systolic BP, diastolic BP, blood sugar, heart rate, and body temperature against risk classifications.

LockedIn — Mobile Productivity & Deep Work System

React Native & Expo interface for LockedIn, featuring offline timer tracking and session telemetry.

LockedIn — Mobile Dashboard & Metrics

LockedIn session review interface with offline SQLite local state persistence.

Personal Calligraphy & Creative Verification Signature

Original hand-drawn verification mark by Chifen Sama Nduma, symbolizing accountability across all published research and code.

Wireless Air Sanitizer — National TV & Radio Broadcasts

Public broadcast and official demonstration of the alcohol-based wireless air sanitiser prototype during the COVID-19 pandemic.

✓ Publicly documented proposal and broadcast records (2020).

HATS Agrobot at Cameroon Presidential ICT Week Finals

The HATS Agrobot autonomous agricultural tractor prototype advancing to the national finals of Presidential ICT Week, winning 3rd Place.

✓ Awarded 3rd place in Cameroon Presidential ICT Week Finals 2022.

Genius Academy — 700+ Students Connected Across Cameroon

Remote study groups and micro-tuition classes organized during COVID-19 school shutdowns connecting over 700 secondary science students.

✓ Genius Academy administrative logs (2020).

MAST Living Room Laboratory Experiments

Early electronics, physical chemistry, and mechanical fabrication experiments under the MAST umbrella with fellow community builders.

✓ Innovative Engineering archive records (2019).

PyCon & UbuCon Cameroon 2026 Keynote Presentation

Speaking on building resilient health technology in low-bandwidth African environments and open-source clinical data pipelines.

✓ Verified speaker schedule at PyCon & UbuCon Cameroon 2026.