Building PropTech for East Africa: M-Pesa Rent Automation

brian ambeyi — Tue, 30 Jun 2026 13:44:08 +0000

The Problem

In Kenya, over 90% of rent payments happen via M-Pesa (mobile money). But most landlords still reconcile these payments manually — downloading M-Pesa statements, matching transactions to tenants in Excel, and spending 8-12 hours/month on what should be automated.

I'm building HomeManager to solve this.

The Technical Stack

Backend: Django + Django REST Framework
Frontend: React (web) + React Native (mobile)
Payments: Safaricom M-Pesa Daraja API (STK Push + C2B)
Infrastructure: AWS (ECS, RDS, S3, CloudFront)
Task Queue: Celery + Redis
AI: Claude API + AWS Bedrock for natural language queries

M-Pesa Integration Architecture

The most interesting technical challenge: automatic payment reconciliation.

When a tenant pays rent via M-Pesa Paybill:

Safaricom sends a C2B callback to our API
We extract the account number from the transaction
Match it to a tenant's unit
Apply payment to their oldest unpaid invoice
Send SMS receipt instantly
Update the dashboard in real-time

The tricky part? Account numbers. Tenants type them inconsistently — "A12", "a12", "A 12", "Apt 12" should all match to the same unit. We built fuzzy matching logic that handles this.

Automated Invoice Generation

Every 1st of the month, a Celery beat task:

Queries all active leases
Generates invoices with rent + utilities (water, garbage)
Calculates water charges from meter readings
Applies any carried-forward balances
Sends SMS/email notifications to tenants

Late Fee Automation

The system:

Checks daily for invoices past grace period
Calculates fee (percentage, fixed, or both)
Adds as a line item on the invoice
Respects configurable caps (tenant protection)
Won't double-charge (idempotent)

This removes the landlord from the "bad guy" equation — it's the system enforcing what the lease says.

Lessons Building SaaS in East Africa

SMS > Email. Most tenant communication is SMS. Email open rates are <20% in this market.
Mobile-first everything. Property managers do meter readings on-site from phones.
Offline matters. Internet isn't always reliable. Cache critical data.
M-Pesa is not Stripe. Powerful API but inconsistent documentation.
Multi-currency from day one. We support KES, UGX, TZS, RWF.

What's Next

WhatsApp Business API integration
Smart meter reading via OCR
Predictive analytics for vacancy forecasting

If you're building fintech or proptech for emerging markets, I'd love to connect.

Platform: homemanager.buniva.co.ke
Company: buniva.co.ke
Full comparison of property management software in Kenya: buniva.co.ke/blog/best-property-management-software-kenya.html

DEV Community: brian ambeyi