Can you build a system like ClearBill (Automated Invoicing & Payment Engine) for my business?

Yes. ClearBill (Automated Invoicing & Payment Engine) is an example of the kind of system I build for Nigerian service businesses. Book a free consultation at demoladevop.com/booking and we can map out exactly what your business needs.

How long does it take to build a system like this?

Most systems take between 2 and 6 weeks depending on complexity. A straightforward booking or invoicing system typically takes 2–3 weeks. A full custom dashboard or multi-platform integration takes 4–6 weeks.

How much does this kind of system cost?

Every project is scoped individually because no two businesses have the same workflow. Book a free 30-minute call at demoladevop.com/booking to discuss your specific situation and get a clear estimate.

What happens if something breaks after you build it?

Every system I build comes with a handover session so you understand how it works. For ongoing support and maintenance, we can discuss a monthly retainer arrangement during the consultation.

Projects/ClearBill

PAYMENTS

Built For:

Professional Services

ClearBill

Automated Invoicing & Payment Engine

Overview

Lagos professional service firms lost track of invoices and payments. This system automates PDF generation, payment reconciliation, and overdue reminders. It runs in the background, ensuring owners get paid faster without manual follow-up.

System Highlights

✦A Lagos consulting firm was tracking partial payments in a WhatsApp group. This engine natively handles remaining balances and overpayments mathematically.
✦The system completely eliminates the 'I didn't see your email' excuse by tracking exactly when a client views their invoice online.
✦Nigerian service businesses lose money because owners hate following up. This engine sends automated overdue reminders without requiring new human headcount.
✦All PDF generation and email dispatches are pushed to a background queue that automatically retries if the office internet drops midway.

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The Core Problem

Every month-end, owners tracked partial payments in WhatsApp chats with their accountants. They constantly asked 'did Client X pay?'. Invoices went out as manual PDFs, with no way to tell if clients actually opened them. This manual follow-up destroyed their weekends.

Infrastructure & Reliability

Nigerian businesses need systems that work even with power cuts or bad internet. This system uses a secure database that protects financial data from corruption during network drops. Important tasks like sending invoices and emails run in the background. If the internet fails, they automatically retry when the connection returns. The system also separates client personal information from financial records, ensuring full NDPA 2023 compliance.

My Approach

This system takes over tasks usually done by human admin. When an invoice is created, it automatically generates a branded PDF and emails it to the client. If a client makes a partial payment, the system instantly recalculates the remaining balance. It updates the invoice status automatically. Every action, from sending payment confirmations to overdue reminders, runs in the background without the owner needing to do anything again.

System Capabilities & Impact

The system tracks and reconciles thousands of concurrent partial payments with zero math errors. It mathematically eliminates human follow-up by automatically dispatching overdue payment reminders based on exact days overdue. The view-tracking capability mathematically eliminates the 'I didn't see your email' excuse. This completely removes the need for an admin assistant to manually generate PDFs and match bank alerts to issued invoices.

Project Gallery

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What Powers This System

The infrastructure keeping this system fast, secure, and always on

FastAPIPythonSQLAlchemyAlembicPostgreSQLNeonDBUpstash RedisCeleryResendJinja2

Need this deployed in your business?

We install the exact engine, integrate your payments, and train your staff in 3 days. Zero technical skills required.