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

OCBC; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Flexible benefits

Professional development

Community initiatives

Equal opportunity

Job summary

OCBC is seeking an experienced API & Middleware Engineer to lead design, development, and governance of enterprise APIs and microservices using Java, Spring Boot, and WSO2 across on‑premises and AWS.

You will guide a team of engineers, collaborate with Product Owners and Architects, and own end-to-end payment services development from initiation to settlement while ensuring security and reliability in a cloud-enabled environment.

Qualifications

• Bachelor’s degree in Computer Science, IT, or related field.
• 8+ years of hands-on software engineering experience in enterprise apps.
• Experience leading technical teams and delivering complex projects.
• Minimum 5 years in payments domain covering initiation, processing, clearing, settlement, reconciliation.

Responsibilities

• Lead design, development, and maintenance of APIs and microservices using Java, Spring Boot, and WSO2.
• Provide technical leadership to engineers, promoting engineering excellence.
• Collaborate with Product Owners, BAs, and Architects to translate requirements into scalable API solutions.
• Drive architecture, implementation, and governance of RESTful APIs and system integrations.
• Lead development of payment services for end-to-end processing.
• Design highly available, fault-tolerant services meeting business and regulatory requirements.
• Ensure API governance, security, and lifecycle practices (OAuth2, JWT, mTLS).
• Oversee integrations using API, middleware, messaging, and Kafka/IBM MQ.
• Champion reliability with monitoring, observability, and disaster recovery.
• Conduct code reviews, architecture assessments, and RCA with production support.
• Prepare architecture diagrams, API specs, runbooks, and support procedures.
• Identify opportunities to enhance scalability, resilience, and developer productivity.
• Leverage AI-assisted tools to accelerate API design and development.
• Collaborate with leadership to drive AI-enabled automation across API development and ops.
• Ensure AI deliverables comply with security and governance standards.

Skills

Java

Spring Boot

WSO2

AWS

Kafka

IBM MQ

API Design

Docker

Kubernetes

Security

DevOps

Education

Bachelor's degree in Computer Science

Tools

WSO2 API Manager

Spring Cloud

Jenkins

Git

Job description

WHO WE ARE:

As Singapore’s longest established bank, we have been dedicated to enabling individuals and businesses to achieve their aspirations since 1932. How? By taking the time to truly understand people. From there, we provide support, services, solutions, and career paths that meet their individual needs and desires.

Today, we’re on a journey of transformation. Leveraging technology and creativity to become a future-ready learning organisation. But for all that change, our strategic ambition is consistently clear and bold, which is to be Asia’s leading financial services partner for a sustainable future.

We invite you to build the bank of the future. Innovate the way we deliver financial services. Work in friendly, supportive teams. Build lasting value in your community. Help people grow their assets, business, and investments. Take your learning as far as you can. Or simply enjoy a vibrant, future-ready career.

Your Opportunity Starts Here.

Why Join
Imagine being part of a team that builds innovative digital solutions for one of Asia’s leading banks. As an API & Middleware Engineer at OCBC, you’ll have the opportunity to work on cutting-edge projects that transform the way we deliver financial services. You’ll be part of a collaborative team that values creativity, innovation, and continuous learning.

How you succeed
To succeed in this role, you’ll need to be passionate about software development and committed to delivering high-quality solutions. You’ll work closely with cross-functional teams to understand business requirements, design and develop software applications, and ensure seamless integration with existing systems. Your ability to collaborate, innovate, and adapt to changing requirements will be key to your success.

What you do

• 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.

• Provide technical leadership and guidance to a team of engineers, promoting engineering excellence, best practices, and continuous improvement.

• Partner with Product Owners, Business Analysts, Solution Architects, and cross-functional teams to translate business requirements into scalable, secure, and resilient API solutions.

• Drive the architecture, implementation, and governance of RESTful APIs, microservices, and system integrations in alignment with enterprise standards and platform strategies.

• Lead the development of payment services supporting end-to-end payment processing capabilities, including payment initiation, validation, clearing, settlement, reconciliation, and reporting.

• Design and implement highly available, fault‑tolerant, and performance‑optimized services that meet business, operational, and regulatory requirements.

• Ensure adherence to API governance, security, and lifecycle management standards, including OAuth2, JWT, Mutual TLS (mTLS), authentication, authorization, and API versioning practices.

• Oversee integration initiatives involving internal and external systems using API, middleware, messaging, and event‑driven technologies such as Kafka and IBM MQ.

• Champion application reliability through robust monitoring, observability, logging, alerting, performance tuning, capacity planning, and disaster recovery practices.

• Conduct code reviews, solution reviews, and technical assessments to maintain high standards of code quality, security, maintainability, and performance.

• Lead root cause analysis, problem resolution, and production support activities.

• Prepare and maintain technical artifacts, including architecture diagrams, API specifications, design documents, operational runbooks, and support procedures.

• Identify opportunities to enhance platform scalability, resilience, security, maintainability, and developer productivity through continuous improvement initiatives.

• Leverage AI‑assisted engineering tools to accelerate API design, software development, testing, troubleshooting, root cause analysis, and performance optimization while maintaining enterprise engineering standards.

• Work closely with architecture and engineering leadership to drive AI‑enabled automation across API development, quality engineering, monitoring, and operational support functions.

• Ensure all AI‑generated deliverables comply with enterprise security, governance, regulatory, risk, and coding standards prior to production deployment.

Who you are

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related discipline.

• 8+ years of hands‑on software engineering experience, including the design and delivery of enterprise‑scale applications and integration solutions.

• Proven experience leading technical teams, mentoring engineers, and driving successful project delivery.

• Minimum 5 years of experience in the payments domain, covering payment initiation, processing, clearing, settlement, reconciliation, and payment operations.

• Strong expertise in API and microservices development using Java, Spring Boot, Spring Cloud, and related technologies.

• Hands‑on experience with WSO2 API Manager, WSO2 Enterprise Integrator (EI) / Micro Integrator, and API Gateway implementations.

• Deep understanding of API lifecycle management, API governance, service design, and API security best practices.

• Experience developing and integrating RESTful and SOAP services using JSON, XML, OpenAPI/Swagger, and related standards.

• Strong experience with cloud‑native application development and deployment, preferably on AWS, leveraging containerization technologies such as Docker and Kubernetes.

• Experience designing and implementing event‑driven and messaging‑based architectures using Kafka, IBM MQ, or similar platforms.

• Solid understanding of payment industry standards and messaging protocols, including ISO 20022, SWIFT, and real‑time payment frameworks.

• Experience implementing observability, monitoring, logging, performance management, and resiliency frameworks for mission‑critical systems.

• Familiarity with DevSecOps practices and CI/CD toolchains, including Jenkins, Bitbucket, Jira, Confluence, SonarQube, and automated testing frameworks.

Good to have experiences:

• Experience working within banking, transaction banking, payments, or financial services organizations.

• Knowledge of regional and global payment schemes, including SWIFT, FAST, PayNow, GIRO, ACH, RTGS, and instant payment platforms.

• Experience supporting high‑volume, highly available payment processing platforms with stringent SLAs and regulatory requirements.

• Exposure to cloud architecture, platform modernization, and digital transformation initiatives.

• Relevant certifications in AWS, Java, WSO2, API Management, or Payments‑related domains.

• Experience driving engineering transformation initiatives, including adoption of AI‑assisted software development and automation practices.

• Demonstrates strong ownership and accountability for technical outcomes and delivery commitments.

• Leads by example through hands‑on technical contribution, innovation, and operational excellence.

• Builds high‑performing engineering teams through mentoring, coaching, and knowledge sharing.

• Influences architectural decisions and engineering standards across teams and initiatives.

• Effectively manages competing priorities while ensuring solution quality, resilience, and security.

Who we are
As Singapore’s longest established bank, we have been dedicated to enabling individuals and businesses to achieve their aspirations since 1932. How? By taking the time to truly understand people. From there, we provide support, services, solutions, and career paths that meet their individual needs and desires.

Today, we’re on a journey of transformation. Leveraging technology and creativity to become a future‑ready learning organisation.
But for all that change, our strategic ambition is consistently clear and bold, which is to be Asia’s leading financial services partner for a sustainable future.

We invite you to build the bank of the future. Innovate the way we deliver financial services. Work in friendly, supportive teams. Build lasting value in your community. Help people grow their assets, business, and investments. Take your learning as far as you can. Or simply enjoy a vibrant, future‑ready career. Your Opportunity Starts Here.

What we offer
Competitive base salary. A suite of holistic, flexible benefits to suit every lifestyle. Community initiatives. Industry‑leading learning and professional development opportunities. Equal opportunity. Fair employment. Selection based on ability and fit with our culture and values. Your wellbeing, growth and aspirations are every bit as cared for as the needs of our customers.

What we offer:

Competitive base salary. A suite of holistic, flexible benefits to suit every lifestyle. Community initiatives. Industry‑leading learning and professional development opportunities. Your wellbeing, growth and aspirations are every bit as cared for as the needs of our customers.