Senior .NET Engineer

.NET Engineer (Microsoft Teams / Voice Platform)

We are looking for a .NET Engineer to join a long-term product project focused on voice communication and Microsoft Teams integrations.

The platform works with calls, meetings, recordings, and communication data. You’ll develop backend services and integrations connecting the product with the Microsoft Teams ecosystem.

Responsibilities

Develop and maintain backend services using C# / .NET and ASP.NET Core

Build and support Microsoft Teams integrations

Work with Microsoft Graph API and Teams communication APIs

Implement functionality related to calls, meetings, recordings, and communication data

Develop and maintain REST APIs and third-party integrations

Troubleshoot production issues related to Teams and voice functionality

Improve backend performance, stability, and scalability

Contribute to architecture and technical decisions

Requirements

5+ years of commercial C# / .NET development experience

Strong experience with ASP.NET Core and backend development

Commercial experience with Microsoft Teams integrations

Hands-on experience with Microsoft Graph API

Experience with APIs related to Teams calls, meetings, recordings, or communications

Experience integrating third-party services and APIs

Good knowledge of SQL and relational databases

Ability to independently investigate and solve technical issues

English: B2+

Will be a plus

Experience with Microsoft Graph Communications APIs

Teams compliance recording or call-recording solutions

Experience with VoIP, telephony, UCaaS/CCaaS, or contact center platforms

Real-time audio/media processing experience

Knowledge of WebRTC, SIP, or RTP

Experience with SignalR / WebSockets

Experience with Azure

What We Offer

Long-term product project

Transparent compensation

Paid vacation and sick leave

Learning and professional development support

High-quality equipment

Paid office lunches

Anniversary gifts and baby bonus

Important: practical commercial experience with Microsoft Teams integrations and Microsoft Graph API is a key requirement for this role.