WSO2 API Microservices Engineer

About the role

OCBC, Singapore's oldest bank, is looking for a Software Engineer who designs, develops and maintains microservices-based APIs using Java and WSO2 API Manager. The role supports business capabilities across on-premises and AWS cloud environments, with a focus on payment processing workflows.

Key responsibilities

• Design, develop and maintain microservices-based APIs with Java and WSO2 API Manager for on-premises and AWS environments.
• Partner with Product Owners, Business Analysts, Tech Architects and engineering teams to turn business requirements into scalable, secure API solutions.
• Build, deploy and manage RESTful APIs, integrations and microservices following enterprise architecture standards and API governance.
• Develop APIs for end-to-end payment processing: initiation, clearing, settlement, reconciliation and reporting.
• Implement API security standards such as OAuth2, JWT, mutual TLS and API lifecycle management with WSO2 platforms.
• Ensure reliability through monitoring, logging, alerting, performance tuning and disaster recovery.
• Build integrations with internal and external systems using messaging, event-driven and middleware technologies.
• Maintain technical documentation, take part in Agile ceremonies, code reviews and architecture reviews, and provide production support for payment applications.
• Use AI tools to speed up API design, code generation, integration and troubleshooting, and explore AI-assisted automation in development, testing and operations.

Required profile

• More than 5 years of hands-on software engineering experience in enterprise application development.
• At least 5 years of end-to-end payments experience (initiation, processing, clearing, settlement, reconciliation).
• Proven experience with WSO2 API Manager and WSO2 Enterprise Integrator.
• Experience with cloud platforms, preferably AWS, and containerized deployments.
• Good knowledge of payment standards such as ISO 20022, SWIFT and real-time payments; preferred: experience in banking, transaction banking or financial services.

Required skills

• Java, Spring Boot, Spring Cloud, RESTful APIs, JSON, XML, OpenAPI/Swagger, SOAP.
• Kafka, IBM MQ or similar messaging and event-driven architectures.
• Monitoring, logging, observability and resiliency; CI/CD toolchains such as Jenkins, Bitbucket, Jira, Confluence, SonarQube.
• Preferred: knowledge of payment schemes such as SWIFT, FAST, PayNow, GIRO, ACH, RTGS and instant payment platforms.

What we offer

• Competitive base salary.
• Holistic, flexible benefits and community initiatives.
• Learning and professional development opportunities.