Senior Java Integration Lead — Onsite Sydney (Clearance)

Experis Australia Pty Ltd.; Sydney; On-site; AUD 207,000 - 289,000; Full time

Job summary

Experis Australia Pty Ltd. is seeking a Senior Java Integration Developer to lead the design and delivery of secure integration services for government-grade platforms in Sydney.

This hands-on technical leadership role requires building and maintaining a complex integration layer that connects enterprise applications with government backend systems, handling high‑volume, sensitive data onsite. You will collaborate with architects, DevOps and testing teams to ensure secure, scalable and compliant

Qualifications

• Active Baseline Clearance or higher required.
• Immediate availability by 1 November 2026.
• 12+ years of commercial Java development experience.
• Experience delivering enterprise integration at senior/lead level.
• Strong expertise designing and building SOAP/XML web services.
• Proven experience with WSDL, XSD, schema transformations and JAXB.
• Hands-on delivery of certificate-based authentication, mTLS and message signing.
• Experience building high-volume, resilient integration platforms.
• Strong knowledge of asynchronous processing, queuing and error handling patterns.
• Kubernetes and containerised microservices expertise.
• Excellent troubleshooting and diagnostic skills across application, infrastructure and networking layers.
• Strong stakeholder engagement and communication skills.

Responsibilities

• Lead the technical design of enterprise integration solutions
• Develop and maintain Java-based integration microservices
• Design and implement JSON to SOAP/XML transformations
• Build asynchronous processing capabilities including queuing, retries and failure management
• Deliver secure integrations using mutual TLS, PKI and digital message signing
• Define and maintain interface contracts and schema mappings
• Build test harnesses and integration stubs to accelerate delivery
• Support integration, performance and security testing activities
• Troubleshoot complex issues within secure environments
• Assist with deployment planning, cutover activities, go-live support and hypercare
• Mentor developers and provide technical leadership across integration initiatives
• Collaborate with architecture, DevOps, testing and business stakeholders

Skills

Baseline Clearance

Java expert

Enterprise integration

WSDL/XSD/JAXB

mTLS

Kubernetes

Security leadership

Tools

Spring Boot

Spring Integration

PostgreSQL

Job description

Experis Australia Pty Ltd. is seeking a Senior Java Integration Developer to lead the design and delivery of secure integration services for government-grade platforms in Sydney.

This hands-on technical leadership role requires building and maintaining a complex integration layer that connects enterprise applications with government backend systems, handling high‑volume, sensitive data onsite. You will collaborate with architects, DevOps and testing teams to ensure secure, scalable and compliant