API Engineer

Whizdom; Sydney; Hybrid; AUD 110,000 - 145,000; Full time

Job summary

Whizdom is seeking an experienced API Engineer in Sydney with a hybrid working model. You will contribute to end-to-end API program delivery, working with business stakeholders, developers, and delivery teams to define requirements, document API solutions, and build robust integrations.

The role focuses on API design, microservices, and DevOps practices in a banking/financial services environment. You will mentor junior consultants and collaborate across workshops and delivery engagements.

Qualifications

• Experience delivering API frameworks and integrations.
• Strong API design and functional specification skills.
• Understanding of microservices design principles.
• Experience in banking/financial services projects (advantageous).

Responsibilities

• Contribute to end-to-end delivery of the API program.
• Participate in requirements discussions with stakeholders.
• Finalize functional specifications and interface documentation.
• Define functional requirements for new services with business teams.
• Collaborate with leads and stakeholders during reviews and sign-offs.
• Document changes within an Agile delivery environment.
• Produce API requirements, designs and specifications.
• Apply microservices design to API and integration solutions.
• Design and develop interfaces that integrate systems and technologies.
• Collaborate with development teams on technical ideas and applications.
• Support workshops and delivery engagements for consultants.
• Mentor junior consultants.
• Remediate code quality, security and design-pattern issues.

Skills

API design

Microservices

Agile methods

Test-driven development

Troubleshooting

Tools

Postman

Maven

Git

Swagger

JUnit 5

Mockito

IDEs

Job description

API Engineer

Location: Sydney/Hybrid Working

About the Opportunity

A leading global technology consultancy is seeking an experienced API Engineer to support a major Australian organisation operating in the banking and financial services sector.

This hands-on role will contribute to the end-to-end delivery of an API-focused program. You will work with business stakeholders, technical specialists, developers, and delivery teams to define requirements, document API solutions, and build robust, scalable integrations.

Key Responsibilities

• Contribute to the end-to-end delivery of the API program.
• Participate in requirements discussions with business stakeholders.
• Help finalise functional specifications and interface documentation.
• Work with business teams to define functional requirements for new services.
• Collaborate with technical leads and business stakeholders during reviews and sign-offs.
• Document and communicate changes within an Agile delivery environment.
• Produce API requirements, designs, and functional specifications.
• Apply microservices design principles to API and integration solutions.
• Design and develop robust interfaces that integrate different systems and technologies.
• Collaborate with development teams on technical ideas and applications.
• Support internal and external consultants across workshops and delivery engagements.
• Assist with the mentoring of junior consultants.
• Help remediate software issues relating to code quality, security, frameworks, and design patterns. ,

Required Skills and Experience

• Previous experience delivering API frameworks and integration solutions.
• Strong understanding of microservices design principles.
• Commercial development experience with:
  • Java 8 or later
  • Spring Framework 5.x
  • Spring Boot 2.x
  • JUnit 5
  • Mockito
  • Java-based logging frameworks
  • Postman
  • Modern integrated development environments
• Experience with infrastructure or DevOps design.
• Strong API requirements, design, and functional-specification documentation skills.
• Previous experience delivering technology projects within banking.
• Strong debugging and problem-solving skills.
• Ability to produce clean, efficient code using test-driven development.
• Experience addressing code-quality and application-security issues. ,

Desirable Experience

Knowledge or practical experience with the following would be advantageous:

• Maven
• Git
• Splunk
• Bamboo
• Swagger
• Software design patterns and standards

What’s on Offer

• A hands-on API engineering position based in Sydney.
• Exposure to a complex banking technology environment.
• The opportunity to contribute across API design, development, integration, testing, and delivery.
• Collaboration with business stakeholders, developers, technical specialists, and experienced consultants.
• Opportunities to support and mentor junior consultants.