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J&M Group Linkedin · Posted 1mo ago

Sr. Windows API & Browser Extension Developer

Canada

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Indexed description

Key Responsibilities

  • Develop secure Microsoft Edge Manifest V3 extensions for data capture and API workflows.
  • Build Windows integration components using C#, .NET Core, Win32 APIs, Windows Services, and Native Messaging.
  • Integrate secure REST APIs using TLS/mTLS, API keys, certificates, and secure authentication.
  • Implement secure in-memory data processing with no sensitive data stored in logs or files.
  • Support Windows Server 2019/2022 and RDS/Terminal Services environments.
  • Manage DPAPI, Windows Certificate Store, service accounts, permissions, and secrets.
  • Implement testing, error handling, retries, timeouts, monitoring, and resilience.
  • Follow Secure SDLC, OWASP, vulnerability management, code reviews, and secure coding practices.
  • Prepare technical documentation, deployment guides, release packages, and support runbooks.
  • Collaborate with architects, security, infrastructure, and customer teams.

Mandatory Skills

  • 8+ years software development experience.
  • 5+ years Windows Server, Windows Platform, and .NET/C# development.
  • 3+ years Edge/Chromium Extension and API integration experience.
  • Manifest V3, Native Messaging, Win32, ASP.NET Core, REST APIs.
  • TLS/mTLS, PKI, Certificate Store, DPAPI.
  • Windows Server 2019/2022 and RDS.
  • Git/GitHub, CI/CD, testing, Secure SDLC, OWASP.
  • Strong troubleshooting, documentation, and customer-facing communication skills.
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