Portfolio

Systems we have built.
Systems that are still running.

A curated selection of production systems from our engineering practice. Each one shipped, deployed and is still in daily use. The oldest has been in production for over two years without a rewrite.

Enterprise ERP Web Financial services Machine learning

By the numbers

Nine years. Production systems.

Years operating

Modules in Smart BI

Automated workflows

Subcontractors

Featured case studies

Four production systems,
each still in daily use.

Enterprise ERP

In-house flagship

AandA Smart BI Platform

Client: In-house flagship
Category: Enterprise ERP
Date: 2024 – present
Stack: Django · AI · Analytics · Real-time

A production Django ERP running the entire operation of A and A Computers and Technologies. Twenty-one integrated modules, hash-chained audit log, real-time analytics, three Telegram bots and 25+ automated workflows. Continuously deployed since 2024.

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Corporate website

In-house

aandatech.com.ng — corporate website

Client: In-house
Category: Corporate website
Date: 2023 – present
Stack: Django · Web · CMS

The AandA public marketing site. Custom Django backend, admin-editable CMS, capability statement generator, customer portal integration. Built end-to-end in-house as the customer-facing entry point for every AandA engagement.

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Financial services

Multiple deployments

Nigerian payment integrations suite

Client: Multiple deployments
Category: Financial services
Date: 2024 – ongoing
Stack: Flutterwave · Moniepoint · Africa's Talking

Production integrations with Flutterwave (card + virtual account transfers), Moniepoint (POS reconciliation) and Africa's Talking (SMS + retention). Webhook verification, reconciliation ledgers, refund flows — reusable across every client we build for.

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Machine learning

In-house Smart BI module

AI fraud detection in production

Client: In-house Smart BI module
Category: Machine learning
Date: 2025 – present
Stack: Isolation Forest · Anomaly detection · Python

Live anomaly-detection pipeline flagging cash-variance and inventory-shrinkage patterns for CEO review via Telegram. Trained on eighteen months of operational data. Alert threshold self-tunes against seasonal baselines.

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ayofemimelehon.com — personal branding site

Personal branding · Web

Ayoolumi Oluwafemi Melehon

ayofemimelehon.com — personal branding site

Client: Ayoolumi Oluwafemi Melehon
Category: Personal branding · Web
Date: 2025 – present
Stack: Next.js · Tailwind · MDX · OG images

A polished Next.js personal-branding site for a Scottish healthcare AI specialist. Portfolio of 9+ real ML projects, MDX-managed content, server-rendered OG previews, and Lighthouse 89 after the animation layer. Delivered end-to-end by AandA.

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Why clients trust us

Six commitments we never break.

CAC Registered

Since 2017

In-House

Engineering

9+ Years

Operating

24/7 Systems

In production

UK & Nigeria

Incorporated

Zero

Subcontractors

Ayoolumi Oluwafemi Melehon, Founder and Principal Engineer, AandA

A note from the founder

“The measure of the work isn’t the launch. It’s the first Monday of every month, when your team logs in and finds the system still doing the job. That’s the discipline we bring.”

Ayoolumi Oluwafemi Melehon

Founder & Principal Engineer · MSc AI, CompTIA Data+

ayofemimelehon.com

Let’s work together

Have a project
in mind?

Tell us what you need. We come back with a written scope and quote within 48 hours.

Let’s Talk Book a discovery call

Systems we have built. Systems that are still running.

Nine years. Production systems.

Four production systems, each still in daily use.

AandA Smart BI Platform

aandatech.com.ng — corporate website

Nigerian payment integrations suite

AI fraud detection in production

ayofemimelehon.com — personal branding site

Six commitments we never break.

Have a project in mind?

Systems we have built.
Systems that are still running.

Four production systems,
each still in daily use.

Have a project
in mind?