C# Software Engineer

An enterprise authentication and credential-management platform used worldwide across industries including healthcare, government, and enterprise environments-is looking for a full-time C# Software Engineer. This is an onsite position - 5 days a week at their headquarters in Greenbelt, MD.

They are modernizing and expanding their entire ecosystem from the Windows Credential Provider to their multi-tenant cloud infrastructure, native Windows services, secure communication layers, BLE/NFC token management, passkey support, browser extension integration, and high-performance Azure back-end services.

This person will need to be comfortable working independently in a fast paced environment and a team player who can wear multiple hats, adapt quickly and wants to solve complex problems.

Required Skills & Experience

• Strong experience with C# and .NET Framework (4.7 )
• Expertise with async/await, multithreading, and concurrent execution
• Experience building Windows Services
• Solid understanding of WPF
• Strong debugging skills (WinDbg, ETW, memory dumps, event logs, performance profiling)
• Ability to design clean APIs and modular architectures
• Comfort working with encryption, security protocols, or OS-level features
• Windows Credential Provider / LSA / authentication packages
• Named Pipes, RPC, or custom IPC
• Kerberos / MSV1_0 / NTLM logon flows
• SQLite, LiteDB, or encrypted local databases
• Azure (App Service, SQL MI, Redis, App Gateway, VMSS)
• BLE/NFC device communication
• Browser extension integrations (Chrome, Edge)
• Xamarin / .NET MAUI for Android & iOS

Desired Skills & Experience

• FIDO2 / passkeys
• Native code (C/C , P/Invoke, unsafe contexts)
• Security-sensitive products used in regulated environments
• Authentication or identity-management products
• Enterprise software used by thousands of endpoints

The Offer You will receive the following benefits:

• Medical, Dental, and Vision Insurance
• 3 weeks PTO
• Weekly catered lunches, team activities, etc.
• 401K w/ Company Match
• Parental Leave Policy
• 12 Company Paid Holidays

Applicants must be currently authorized to work in the US on a full-time basis now and in the future.

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.