Senior Java Developer – Fintech Payments

About the role

DigiCash is building modern financial infrastructure for Africa and needs a senior Java engineer to design, develop, and maintain high‑performance payment processing systems. You will work on core backend services that handle large‑scale, low‑latency transactions for banks, mobile‑money operators, and government payment platforms.

Key responsibilities

• Build low‑latency, high‑availability applications using Java and Spring Boot.
• Design and implement robust services for the payment gateway, transaction ledgers, and financial reconciliation.
• Develop scalable distributed systems and micro‑services capable of handling high transaction volumes.
• Write clean, testable, maintainable, and well‑documented code.
• Ensure compliance with strict financial security standards.
• Conduct peer code reviews and contribute to architecture discussions.
• Troubleshoot production incidents and improve reliability, performance, and observability.
• Collaborate with product, operations, and leadership to shape technical solutions.
• Mentor mid‑level and junior engineers on best practices.

Required profile

• 5+ years of hands‑on Java development experience.
• Strong expertise in Spring Boot, Spring Security, Spring Data, and RESTful API design.
• Experience designing and maintaining distributed systems or micro‑service architectures.
• Background in Fintech, banking, payments, or other high‑availability transactional environments.
• Proficiency with PostgreSQL, complex query optimization, and database design.
• Understanding of asynchronous processing and event‑driven architectures.

Required skills

• Java
• Spring Boot
• Spring Security
• Spring Data
• RESTful APIs
• PostgreSQL
• Micro‑services
• Distributed systems
• Asynchronous processing
• Event‑driven architecture
• RabbitMQ or Kafka (nice to have)
• Golang (nice to have)
• Docker
• Kubernetes
• AWS or other cloud platforms
• Observability and monitoring tools