VERIFIED ENGINEERING PORTFOLIO

Engineering case studies.

We engineer mission-critical systems that handle real financial transactions, sensitive medical data, and institutional operations daily. Here is how we break down complex challenges into robust software.

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Acadix: Kenyan CBC & 8-4-4 School Management Engine

LIVE PRODUCTION SECTOR: EDUCATION

OVERVIEW

Kenyan educational institutions are undergoing a historic transformation from the traditional 8-4-4 system to the Competency-Based Curriculum (CBC). Schools struggled with complex multi-strand rubric grading, fragmented fee ledgers prone to reconciliation error, and manual attendance tracking that consumed hundreds of administrative hours per term.

THE SYSTEM PROBLEM

— Manual M-Pesa Verification: Cashiers spent hours daily verifying parent SMS payment codes against bank slips, creating queues and accounting inaccuracies.

— CBC Assessment Complexity: Teachers faced four performance levels (Exceeding, Meeting, Approaching, Below Expectations) across dozens of specific learning strands, making paper report generation grueling.

ARCHITECTURAL SOLUTION

CodeCine architected Acadix around an event-driven core connecting real-time banking webhooks to student ledger state machines:

Parent triggers M-Pesa STK push → Safaricom Daraja Webhook → Acadix Transaction Worker verifies reference → Mongo fee balance debited atomically → Automated SMS confirmation sent to guardian within 1.8 seconds.

BACKEND Node.js / Express

DATABASE MongoDB / Redis

PAYMENTS Daraja C2B / STK

MESSAGING SMS Web Gateway

SYSTEM TELEMETRY METRICS

PAYMENT RECONCILIATION < 1.8s STK

REPORT CARD GENERATION 100% CBC Validated

ACTIVE SECURITY Granular Role-Based Access Control

Inspect Acadix Live Demo

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Swift POS: Offline-Resilient Multi-Store Architecture

LIVE PRODUCTION SECTOR: RETAIL COMMERCE

OVERVIEW

Retail operations in fast-paced commercial hubs face frequent network drops and power fluctuations. Cloud-only point-of-sale systems that freeze when fiber connections drop cause immediate revenue loss and angry checkout queues.

THE SYSTEM PROBLEM

— Network Vulnerability: When connectivity dips, cashiers are unable to scan barcodes, print receipts, or record transactions.

— Branch Inventory Desynchronisation: Multi-branch retailers struggle with stock discrepancies when sales at branch A aren't reflected in the central warehouse.

ARCHITECTURAL SOLUTION

We engineered Swift POS with a local-first operational paradigm:

Checkout terminals store the entire product catalogue and transaction queue in browser-level IndexedDB. Cashier scanning latency is under 15ms. When connectivity restores, a background sync service pushes cryptographically hashed batch transactions to the master server, ensuring zero double-entries and zero lost sales.

SYNC ENGINE WebSockets

LOCAL CACHE IndexedDB

PRINTER PROTOCOL ESC/POS Thermal

FINANCIAL HOOK Buy Goods Hook

SYSTEM TELEMETRY METRICS

OFFLINE LATENCY < 15ms Scan

OFFLINE DURABILITY 100% Offline Resilient

HARDWARE INTEGRATION USB • Bluetooth • Thermal ESC

Inquire About Swift POS

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Healthcare Information Systems: Clinical EHR & Dispensary

SPECIALIZED ARCHITECTURE SECTOR: HEALTHCARE

Clinics, consultation practices, and outpatient centres require bulletproof data integrity, patient confidentiality, and tight coupling between doctor consultations, pharmacy fulfillment, and billing reconciliation.

Doctor consultation notes and diagnostic histories are encrypted at rest with AES-256. Dispensary staff receive verified digital prescriptions directly inside their terminal without paper slips, preventing prescription duplication and ensuring real-time pharmacy stock drawdown.

ENCRYPTION AES-256 at Rest

AUDIT PIPELINE Immutable Logs

DATABASE PostgreSQL

ACCESS POLICY Strict RBAC

CLINICAL HIGHLIGHTS

• Strict role-based clinician & nursing access separation

• Automated prescription dispensing & expiry alerts

Discuss Clinical Systems

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