Contact person: Business Client

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Location: São Paulo, Brazil

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I am looking for a C++ Developer with experience in VoIP (PJSIP stack) and Visual Studio to create a fully configured, compilable development environment for MicroSIP version 3.21.6.0.

The goal is to receive a complete source package that I can open in Visual Studio and build immediately ("out-of-the-box") without hunting for missing dependencies or fixing linker errors.

Technical Requirements
Source Code: Use MicroSIP version 3.21.6.0 (source available at [login to view URL]).

OpenSSL Integration: Full integration of OpenSSL for secure signaling and media (TLS/SRTP).

Core Features:

Functional Make/Receive Calls.

Opus Codec support enabled and tested.

MP3 Recording functionality fully operational.

Dependencies: All necessary libraries (PJSIP, FFmpeg, OpenSSL, etc.) must be included and properly linked with relative paths.

Deliverables (Acceptance Criteria)
The project will be delivered as a single ZIP file containing:

Full Source Tree: All MicroSIP source files plus all required third-party libraries (headers and .lib files).

Compilable Solution: A Visual Studio Solution (.sln) that compiles successfully in both Debug and Release modes.

Windows Setup Project: A functional installer project (e.g., InnoSetup or VS Installer) to generate the Windows executable.

Functional Verification: The compiled binary must successfully register to a SIP server, handle calls using the Opus codec, and record calls to MP3 files.

Preferred Skills
Strong experience with C++ and Win32 API.

Deep understanding of the PJSIP stack.

Experience compiling OpenSSL and Mp3 libs for Windows.

Familiarity with Visual Studio build tools and project configurations." (client-provided description)