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Okoroafor Austine

@okoroaforaustine

Senior Java Consultant at Interswitch Group building enterprise banking platforms, including internet banking for 500K+ customers.

Nigeria

Message

At Interswitch Group, I led work on a scalable enterprise banking platform and developed secure high-value transactions. I also architected internet banking for 500K+ customers, with QR-enabled transfers, recurring payments, and airtime and data services.

Across fintech roles, I built payment and banking systems, including a KYC and identity verification system at FCMB Rova and a dispute resolution portal at Charistech Limited. My work has included cross-border payments, API integrations, and improving system performance and reliability.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Consultant

Current

Interswitch Group

Sep 2024 - Present (2 years 1 month)

Led scalable enterprise banking platform serving millions of users, developed secure high-value transactions, and architected internet banking for 500K+ customers. Reduced latency by 40% with JPA optimizations and maintained 99.99% uptime with Spring Boot microservices.

Java Spring Boot Kafka Redis Docker AWS OAuth Spring Security JPA Microservices

Software Engineer

FCMB Rova

Sep 2024 - Mar 2025 (6 months)

Built KYC and identity verification system with Onfido API, processing 15K+ verifications daily with 15% fraud detection. Developed RESTful banking APIs with caching optimization.

Java Spring Boot MySQL Redis Apache Pulsar Docker AWS REST APIs Caching

Software Engineer (Contract)

Charistech Limited

Sep 2022 - Sep 2024 (2 years)

Built dispute resolution portal, reducing chargeback time by 65%. Automated evidence collection and resolution workflows.

Java Spring Boot MongoDB Redis

Senior Software Engineer

eProcess (Ecobank)

Jan 2022 - Sep 2022 (8 months)

Developed PAPSS integration for cross-border payments across 12 countries and built monitoring for N800M+ remittance volumes. Mentored 3+ junior engineers.

Java Spring Boot Oracle DB Web Logic PAPSS Cross Border Payments

Software Engineer

3Line Card Management

Jul 2021 - Dec 2021 (5 months)

Developed agency banking app with 2.5M+ monthly transactions and built RBAC-enabled admin portal with real-time reports. Increased revenue by 30% via commission restructuring.

Java Spring Boot MySQL RBAC Real time Reporting

Software Engineer

eTranzact

Apr 2017 - Jul 2021 (4 years 3 months)

Boosted transactional reporting performance by 98% and reduced runtime by 75% by migrating to Spring Boot microservices. Established DevOps practices, reducing production incidents by 40%.

Java Spring Boot ELK Stack REST MySQL DevOps Microservices