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Adesanya Samuel

@adesanyasamuel

Backend Software Engineer at BanffPay Ltd who built a multi-country bill payment engine and resilient payment orchestration systems.

Nigeria

Message

At BanffPay Ltd, I architected a multi-country bill payment microservice engine with Java and Spring Boot, and built a transaction orchestration backend for UBA Liberia agent networks.

I also implemented a webhook payout platform connecting Zoho payment triggers with Rubies and MTN MoMo Liberia rails, including failure recovery, routing, and transaction reconciliation.

At eTranzact PLC, I developed a reporting ecosystem of four Spring Boot microservices and improved query execution latency by 99% using Redis caching and SQL optimization.

At Centric Gateway / SeerBit, I engineered GTBank Ghana payout infrastructure and asynchronous wallet processing. I also optimized MySQL and Redis persistence and supported a zero-downtime wallet database migration.

Experience

Work history, roles, and key accomplishments

Current

Back-End Software Engineer

Current

BanffPay Ltd

Mar 2026 - Present (7 months)

Architected a resilient multi-country bill payment microservice engine using Java and Spring Boot, and engineered low-latency transaction orchestration for UBA Liberia agent networks. Designed a high-availability webhook payout platform and decoupled monolithic workflows into event-driven topologies with Kafka and RabbitMQ.

Java Spring Boot Spring WebFlux (Reactive)Kafka RabbitMQ REST APIs SOAP AWS Docker PostgreSQL MySQL Redis OAuth JWT RBAC OWASP Top 10 PCI DSS ISO 27001

Back-End Software Engineer

eTranzact PLC

Mar 2025 - Mar 2026 (1 year)

Overhauled and parallelized processing workflows across the high-volume PayOutlet collection grid using Spring Boot, and designed a distributed reporting ecosystem of 4 microservices. Compressed query execution latency by 99% through Redis caching and SQL optimization, and hardened security with RBAC schemas.

Java Spring Boot Microservices Redis SQL MySQL PostgreSQL RBAC OWASP Top 10 PCI DSS ISO 27001

Back-End Software Engineer

Centric Gateway / SeerBit

Feb 2023 - Aug 2024 (1 year 6 months)

Engineered the core GTBank Ghana automated payout infrastructure using Spring Boot microservices, and developed non-blocking asynchronous request processing with Amazon SQS. Optimized multi-tenant MySQL persistence and orchestrated a zero-downtime production database migration for a wallet engine.