Lead Systems Developer Location: Canberra, ACT duration: 6 months About the Opportunity Our government client is seeking a highly experienced Lead Systems Developer to support the maintenance, enhancement, and stabilisation of a complex, business-critical legacy system. Key Responsibilities Lead development, maintenance, troubleshooting, and enhancement of a legacy .NET application and associated components Design and develop solutions using C#, .NET/.NET Core, ASP.NET, APIs, and batch processing frameworks Develop and maintain database components including SQL scripts, stored procedures, views, functions, and reporting datasets Diagnose and resolve complex production issues, including system defects, performance problems, integration failures, and data inconsistencies Develop, maintain, and support system integrations such as APIs, scheduled jobs, and data exchange processes Participate in vendor knowledge transfer by reviewing code, documentation, and operational procedures, and applying this knowledge through hands-on work Produce and maintain technical documentation including deployment guides, troubleshooting materials, and operational runbooks Implement technical changes in line with architecture standards, security requirements, and release management processes Support controlled software releases using Azure DevOps or similar tools, including source control, branching strategies, and deployment pipelines Contribute to team capability through mentoring, knowledge sharing, and establishing repeatable development and support practices Skills and Experience Extensive experience with Microsoft .NET technologies, including .NET/.NET Core, C#, ASP.NET, and Web APIs Strong experience supporting and enhancing legacy or mission-critical systems Proven expertise in SQL and relational database development, including performance optimisation and data integrity management Experience with system integration, including APIs, batch processing, and data exchanges Solid understanding of modern development practices including Git-based source control, CI/CD, testing, and Azure DevOps Experience diagnosing and resolving production issues across application, database, and integration layers Ability to analyse and work with complex existing codebases and manage technical debt effectively Behavioural Capabilities Ability to work independently with limited direction while managing competing priorities Strong communication skills, with the ability to translate technical concepts for diverse stakeholders Proactive in identifying risks, issues, and opportunities for improvement Committed to delivering high-quality, reliable, and user-focused outcomes Collaborative team player who contributes to a positive and high-performing work environment Desirable Requirements Tertiary qualifications in Information Technology, Software Engineering, or related discipline Microsoft certifications (e.g. .NET, Azure, DevOps, database development) Familiarity with IT service management frameworks (e.g. ITIL) Experience in public sector or large enterprise environments How to Apply: To apply, click the Apply Now button and send your up-to-date resume, for a confidential discussion call us now on 02 5119 3133. Applications received after submission may be considered for similar roles. If this job isn't quite right for you but you are looking for a new position, please contact us for a confidential discussion on your career. Reference number: 1726208 Profession:Government, Emergency Services & DefenceState Government Company: Onpoint 365 Date posted: 5th Jun, 2026
