I'm Immanuel Justice Mac-Arthur — a software developer crafting performant, secure interfaces for banks, payment networks and mission-driven organisations across Africa.
Years building UIs
Production systems
Cross-border payments
Inclusive finance
I'm Immanuel Justice Mac-Arthur, a Software Developer with deep experience shipping robust web applications for the fintech sector and NGOs. From cross-border payment rails to inclusive-finance platforms, I focus on systems where reliability, security and clarity are non-negotiable.
My work spans architecture, design systems, and production deployment — bridging beautiful frontends with hardened backend services in C#, Java and PostgreSQL. I care about details: the weight of a button, the latency of a transaction, the integrity of a record.
SPA architecture
Design systems
Enterprise APIs
Service backbones
Transactional data
Scalable storage
A snapshot of recent engagements across fintech infrastructure and inclusive-finance platforms.
A premium, high-end landing experience for the Center for Inclusive Finance — designed for clarity, trust and institutional credibility.
Contributed to UI management and technical deployment for the Pan-African Payment and Settlement System — powering instant cross-border payments across Africa.
Secure banking UIs and payment systems for financial institutions. Hardened authentication, role-based dashboards and transactional flows.
I take on a small number of engagements each quarter — from greenfield platforms to performance and security overhauls.
Start a conversation