[Hiring] Senior C# / .NET Engineer @Software Engineering Firm

Role Description

We are looking for a skilled Senior C# / .NET Engineer to support a critical platform security and modernization initiative. This role focuses on backend/API enhancements, security implementation, and system reliability improvements in alignment with Azure-based infrastructure and data protection standards.

Key Responsibilities

• Design and develop secure backend services and APIs using C# / .NET.
• Implement authentication and authorization mechanisms (SSO, RBAC, OAuth, JWT).
• Integrate applications with Azure Active Directory (Entra ID).
• Remove hardcoded secrets and integrate with Azure Key Vault.
• Implement audit logging and monitoring hooks across services.
• Build and enforce secure API communication standards.
• Implement PII masking and secure data handling logic in applications.
• Secure and optimize third-party integrations (Stripe, SendGrid, Twilio, etc.).
• Support environment separation and deployment improvements.
• Collaborate with DevOps and DB teams on security, DR, and compliance initiatives.
• Participate in debugging, incident resolution, and root cause analysis.

Qualifications

• 4+ years of experience in C# / .NET development.
• Strong experience with ASP.NET Core, Web APIs, and microservices architecture.
• Experience implementing authentication & authorization (OAuth, JWT, SSO).
• Hands-on experience with Azure services, especially Azure AD (Entra ID).
• Experience with secure coding practices and data protection.
• Familiarity with API integrations (Stripe, SendGrid, etc.).
• Experience with logging frameworks and monitoring tools.
• Understanding of CI/CD pipelines and cloud deployments.
• Strong debugging, problem-solving, and communication skills.

Requirements

• Good to Have: Experience with containerization (Docker, Kubernetes).