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.