Api & Platform Engineer - 12 Month Fixed Term Contract

Rest; Sydney; Hybrid; AUD 140,000 - 160,000; Full time

Job summary

Rest in Sydney is seeking an experienced API Engineer to support a major Australian banking and financial services project on a 12-month fixed-term contract. This hands-on role focuses on delivering scalable API solutions, integrating diverse systems, and applying microservices design in an Agile environment.

You will work with stakeholders and technical teams, define requirements, document interfaces, and mentor junior consultants while writing clean, test-driven Java code using Spring Boot,

Qualifications

• Experience delivering API frameworks and integration solutions.

Responsibilities

• Contribute to the end‑to‑end delivery of the API programme.

Skills

API development

Microservices design

Java 8+

Spring Framework

JUnit 5

Mockito

Postman

IDE tooling

DevOps familiarity

Tools

Postman

Swagger

Git

Maven

Splunk

Bamboo

Job description

API Engineer – 12 Month Fixed Term Contract (Sydney, Hybrid)

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 programme.
• 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

• 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.

Contractual Details

Salary: $140,000–$160,000 base + super + bonus
Contract: 12 month fixed term

Equality and Inclusion
We welcome applications from all backgrounds and experiences, especially those who bring unique perspectives to our team.