Security Engineer (.NET Software Development)

Job Description

The Security Engineer is responsible for ensuring that software solutions are designed, developed, tested, and deployed in accordance with secure development practices and organisational security standards. Working closely with software engineers, architects, DevOps teams, and client stakeholders, the role focuses on identifying security risks, implementing security controls, and embedding security throughout the software development lifecycle. The Security Engineer combines hands-on application security expertise with secure coding knowledge within the Microsoft.NET ecosystem.


Responsibilities

• Embed security best practices throughout the software development lifecycle (SDLC).
  
• Conduct security reviews of application designs, architecture, and codebases.
  
• Identify, assess, and remediate application security vulnerabilities and risks.
  
• Perform secure code reviews for .NET applications and provide remediation guidance to development teams.
  
• Support the implementation of authentication, authorisation, encryption, and secure communication mechanisms.
  
• Configure and maintain application security tooling, including static and dynamic security testing solutions.
  
• Collaborate with development teams to address vulnerabilities identified through security assessments and penetration testing.
  
• Support threat modelling activities and security risk assessments for new and existing solutions.
  
• Develop and maintain security standards, guidelines, and secure coding practices.
  
• Assist with security incident investigation, root cause analysis, and remediation activities.
  
• Ensure solutions comply with security, privacy, governance, and regulatory requirements applicable to client environments.
  
• Contribute to security awareness and secure development knowledge sharing within engineering teams.
  

Requirements

Technical Skills

• Languages & Frameworks: C#, ASP.NET Core, .NET Framework, EF Core, SQL, TypeScript, HTML/CSS, Python Flask, Python
  
• Application Security: Secure SDLC, threat modelling, secure code reviews, vulnerability management
  
• DevOps & CI/CD: Azure DevOps, Git, Docker, security scanning tools
  
• Cloud & Infrastructure: Microsoft Azure, Azure App Services, Azure Key Vault, Azure Storage, Virtual Machines
  
• Testing & QA: SonarQube, OWASP ZAP, Burp Suite, Postman, security testing frameworks
  
• Identity & Access Management: OAuth2, OpenID Connect, JWT, Microsoft Entra ID
  
• Security Standards: OWASP Top 10, CWE, CVSS, secure coding standards
  
• Monitoring & Logging: Microsoft Sentinel, Application Insights, Azure Monitor (advantageous)
  

Knowledge & Attributes

• Strong understanding of application security principles and secure software design.
  
• Ability to identify security risks and communicate mitigation approaches effectively.
  
• Strong analytical and problem-solving skills.
  
• Ability to work collaboratively with development, architecture, infrastructure, and operational teams.
  
• Attention to detail and commitment to delivering secure, high-quality solutions.
  
• Strong written and verbal communication skills.
  
• Ability to balance security requirements with business and delivery objectives.
  

Qualifications

• Bachelor's degree in Computer Science, Information Security, Engineering, or a related field (advantageous), or equivalent practical experience.
  
• Relevant Microsoft Azure security certifications are advantageous.
  
• Industry-recognised security certifications such as Security+, SSCP, CEH, AZ-500, CSSLP, or equivalent are advantageous.
  

Experience

• 5+ years of experience in software engineering, application security, or secure solution delivery.
  
• Hands-on experience securing.NET and cloud-based applications.
  
• .NET vs Python Flask Experience
  
• Experience using security testing, code scanning, and vulnerability management tools.
  
• Experience working with Azure-based environments and DevSecOps practices.
  
• Understanding of regulatory, compliance, and governance requirements within enterprise environments.
  
• Experience supporting remediation activities arising from security assessments and penetration testing exercises.