// SYSTEM ARCHITECTURE & BACKEND ENGINEERING

I design systems that scale — end to end.

Nairobi, Kenya · Systems & Backend Engineer. Backends, distributed workers, mobile, payments (M-Pesa), and notifications (WhatsApp) — from schema to ship.

Open a ticket View work

George Ndirangu, Systems & Backend Engineer

live · github

Public repositories102live · github.com/Ndirangug
Building since2020production systems
Primary stacks.NET · TypeScript · Kotlincore
Flagship systems03shipped end-to-end

// SYSTEMS

Flagship systems

View all →

Multi-Tenant Scheduling SaaS

Operational

Schema-isolated multi-tenant appointment platform with async WhatsApp reminders and M-Pesa payments.

.NET
PostgreSQL
Redis
Hangfire
WhatsApp
M-Pesa

View case study →

Notitia — Observability Platform

Operational

Automated observability and PDF reporting service replacing manual spreadsheet workflows.

C#
.NET
QuestPDF
PostgreSQL
SMTP

View case study →

Matatu Digital Signage

Operational

IoT edge signage for Kenyan matatu fleets — offline-first Raspberry Pi clients managed over MQTT.

Raspberry Pi
MQTT
Python
Node.js
React

View case study →

// PROJECTS

Selected work

All projects →

dotnet_microservices

Production-grade .NET microservices reference architecture with service discovery, async messaging, and distributed tracing.

.NET
C#
Docker
RabbitMQ
PostgreSQL

valr-orderbook

High-throughput order book engine for a cryptocurrency exchange, implementing price-time priority matching.

Go
Redis
WebSocket
Finance

micro-erp-backend

Modular ERP backend with inventory, invoicing, and staff management modules built for small-to-medium enterprises.

.NET
PostgreSQL
REST
Docker

// CONTACT

Have a hard systems problem?

I work on complex backends, distributed systems, and integrations. If you have a hard engineering problem, I want to hear about it.

Open a ticket →