Security-Cleared .NET Tech Lead for Secure Apps

Whizdom; Shire Of Laverton; On-site; AUD 110,000 - 150,000; Full time

Benefits offered by this job

Mission-critical platforms

Secure environment challenges

Collaborative team of professionals

Long-term contract potential

Job summary

Whizdom in Melbourne seeks a Senior .NET Developer (Technical Lead) to guide sustainment, enhancements, and support for mission-critical applications operating in a highly secure defence technology environment.

You will lead Level 3/4 support, design major enhancements, coordinate end-to-end releases, maintain security accreditation, and provide technical leadership across the full SDLC, onsite in Laverton (Melbourne).

Qualifications

• Strong expertise in .NET Framework, .NET Core, and C# development.
• Extensive experience with Microsoft technology environments.
• Knowledge of IIS and Windows Server hosting.
• Experience across the full Software Development Lifecycle (SDLC).
• Experience working within structured Waterfall delivery frameworks.
• Excellent problem-solving, troubleshooting and stakeholder engagement skills.
• Experience supporting business-critical systems in secure or regulated environments.

Responsibilities

• Lead Level 3 and Level 4 application support activities, including code-level troubleshooting and root cause analysis.
• Design and deliver major application enhancements within a structured Waterfall development methodology.
• Maintain application security accreditation and configuration in line with Information Security Manual (ISM) requirements.
• Coordinate end-to-end software releases, ensuring appropriate testing, approval, and deployment controls are followed.
• Manage high-priority incidents and provide timely resolution of critical production issues.
• Maintain and update technical documentation, including architecture and system design artefacts.
• Provide technical leadership and guidance across application lifecycle activities.

Skills

.NET Framework

.NET Core

C#

IIS

Windows Server

SDLC

Waterfall

Security environments

Stakeholder engagement

Job description

Whizdom in Melbourne seeks a Senior .NET Developer (Technical Lead) to guide sustainment, enhancements, and support for mission-critical applications operating in a highly secure defence technology environment.

You will lead Level 3/4 support, design major enhancements, coordinate end-to-end releases, maintain security accreditation, and provide technical leadership across the full SDLC, onsite in Laverton (Melbourne).