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Senior Windows Developer

1 month ago

Gurgaon, Haryana, India Espire Infolabs Full time

Job Description:

We are seeking a highly skilled Senior Windows Developer with expertise in authentication mechanisms, low-level Windows internals, and secure credential management. The ideal candidate should have 7+ years of experience and should have extensive experience in developing authentication-based software and a deep understanding of Windows security architecture, authentication protocols, and driver-level programming.

Key Responsibilities:

  • Develop and maintain authentication-based software, focusing on secure credential management and Windows authentication mechanisms.
  • Design and implement Windows authentication components such as Local Authentication Subsystem (LSA), Credential Providers, and Security Support Provider Interface (SSPI).
  • Work with Windows authentication protocols, including Kerberos, NTLM, OAuth, SAML, and Smart Card authentication.
  • Develop and modify Windows Credential Providers to extend authentication functionality for login and enterprise security.
  • Enhance and integrate authentication mechanisms with enterprise environments, including Active Directory (AD) and Azure AD.
  • Utilize Windows API, LSA, and Win32 APIs to create robust authentication solutions.
  • Develop and maintain Windows services, drivers, and system-level components to support authentication workflows.
  • Perform security analysis and debugging of authentication mechanisms, working with debugging tools like WinDbg and Sysinternals Suite.
  • Optimize authentication performance and security by implementing best practices in Windows security and cryptography.
  • Ensure compatibility across various Windows versions and architectures, including 32-bit and 64-bit environments.
  • Collaborate with security teams to ensure compliance with enterprise security standards and policies.

Essential Skills & Experience:

  • Extensive experience in Windows system programming, including knowledge of Windows internals and authentication subsystems.
  • Strong proficiency in C, C++, C#, and .NET for Windows application and system development.
  • In-depth understanding of Windows authentication mechanisms, including:
  • LSASS (Local Security Authority Subsystem Service)
  • Credential Providers (V1 & V2)
  • Security Support Provider Interface (SSPI)
  • Windows Biometric Framework (WBF)
  • Expertise in authentication protocols:
  • Kerberos
  • NTLM
  • OAuth
  • SAML
  • LDAP
  • RADIUS
  • FIDO2/WebAuthn
  • Experience with Windows system security tools, including debugging and forensic analysis using WinDbg, Process Monitor, and Event Tracing for Windows (ETW).
  • Experience in developing and troubleshooting Windows services, DLLs, and drivers.
  • Knowledge of Windows security policies, encryption, and certificate-based authentication (PKI, Smart Cards, TPM, BitLocker).
  • Familiarity with Active Directory, Group Policy, and enterprise security best practices.
  • Ability to analyze and reverse engineer security vulnerabilities in authentication workflows.

Preferred Qualifications:

  • Experience with Windows Kernel Development and Windows Filtering Platform (WFP).
  • Prior experience in developing Windows security products such as endpoint protection, identity management, or authentication solutions.
  • Knowledge of PowerShell scripting and automation for security and system management.