Senior Engineer, API & Middleware Development (Java / WSO2)

About the role

OCBC, Singapore's oldest bank, is looking for a Senior API & Middleware Engineer to lead the design, development and maintenance of enterprise-grade APIs and microservices using Java, Spring Boot and WSO2 technologies, across on-premises and AWS cloud environments. The role also covers payment services, technical leadership of a team of engineers and integration of internal and external systems.

Key responsibilities

• Design, develop and maintain APIs and microservices, and lead payment services covering initiation, validation, clearing, settlement, reconciliation and reporting.
• Provide technical leadership and guidance to a team of engineers, and partner with Product Owners, Business Analysts and Solution Architects to turn business requirements into secure, scalable API solutions.
• Drive architecture, implementation and governance of RESTful APIs, microservices and integrations, including Kafka and IBM MQ.
• Ensure compliance with API governance, security and lifecycle standards (OAuth2, JWT, mTLS, authentication, authorization, API versioning).
• Oversee observability, logging, alerting, performance tuning, capacity planning and disaster recovery, and conduct code and solution reviews.
• Lead root cause analysis, production support and maintain technical artifacts such as architecture diagrams, API specifications and runbooks.
• Use AI-assisted engineering tools to speed up development, testing and troubleshooting, and champion AI-enabled automation across API development, quality engineering and monitoring.

Required profile

• Bachelor's degree in Computer Science, Information Technology, Engineering or a related discipline.
• 8+ years of hands-on software engineering experience, including enterprise-scale applications and integration solutions.
• Proven experience leading technical teams and mentoring engineers.
• Minimum 5 years of experience in the payments domain (initiation, processing, clearing, settlement, reconciliation, payment operations).

Required skills

• Java, Spring Boot, Spring Cloud and API/microservices development.
• WSO2 API Manager, WSO2 Enterprise Integrator / Micro Integrator and API Gateway.
• RESTful and SOAP services with JSON, XML, OpenAPI/Swagger.
• AWS, Docker and Kubernetes; Kafka and IBM MQ; ISO 20022, SWIFT and real-time payment frameworks.
• DevSecOps, CI/CD (Jenkins, Bitbucket, Jira, Confluence, SonarQube) and automated testing.
• Good to have: banking or payments experience, knowledge of SWIFT, FAST, PayNow, GIRO, ACH, RTGS, relevant certifications, and experience with AI-assisted development.

What we offer

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