. NET Full-Stack Engineer - Microsoft Teams Bots & Communications

We’re looking for an experienced . NET Full-Stack Engineer to join a long-term product team working within the Microsoft Teams ecosystem.

The role is primarily backend-focused and combines Microsoft Teams bots, Microsoft Graph integrations, real-time activity processing, notifications, and communication-related functionality.

You’ll work on production features inside Microsoft Teams, including bot interactions, activity feeds, communication events, and integration with Microsoft 365 services.

What you’ll work on
Design, develop, and maintain Microsoft Teams bots that process user and system activity in real time.
Build and improve a real-time activity feed bot that sends timely notifications to users’ Teams activity feed through Microsoft Graph.
Develop integrations with Microsoft Graph API, Microsoft Teams APIs, and Microsoft 365 services.
Work with Teams-related functionality such as calls, meetings, participants, recordings, call records, notifications, and communication data.
Build backend services for collecting, processing, and exposing Teams activity and communication data.
Implement real-time functionality using SignalR / WebSockets where applicable.
Set up and manage bot authentication and permissions with Microsoft Entra ID (Azure AD).
Contribute to frontend functionality using React / Angular / TypeScript when needed.
Troubleshoot application-level integration issues and improve reliability and performance.

Core stack
C# / . NET / ASP. NET Core
Microsoft Graph API
Microsoft Teams APIs
Microsoft Graph Communications / Cloud Communications APIs
Microsoft Bot Framework / Teams bots
Microsoft Entra ID
SignalR / WebSockets
SQL
REST APIs
React / Angular / TypeScript

Requirements

5+ years of commercial experience with C# / . NET
Strong backend experience with ASP. NET Core
Commercial experience with Microsoft Graph API
Hands-on experience with Microsoft Teams integrations
Experience developing or supporting Teams bots
Understanding of Teams activity feed notifications, Graph permissions, authentication, and event-driven integrations
Experience with Microsoft Entra ID / Azure AD authentication and permissions
Experience with SQL and REST APIs
Ability to independently deliver integrations and troubleshoot production issues
English B2+

Strong advantage
Microsoft Graph Communications / Cloud Communications APIs
Teams calls / online meetings / call records / recordings / participants
Real-time audio/media
VoIP / telephony
WebRTC
SIP / RTP
Direct Routing
Azure Communication Services
High-load or distributed systems

About the project
This is a long-term product, not a short-term integration project. You’ll join a stable development team with an ongoing roadmap and deep involvement in the Microsoft Teams ecosystem.
The role combines backend engineering, cloud infrastructure, Microsoft Graph integrations, Teams bot development, and real-time communication functionality.

What we offer

Long-term cooperation
Full-time engagement
Stable US-based client
Predictable workload
Paid vacation and sick leave
Professional development support
Equipment provided
Office lunches
Anniversary and baby bonuses