246 hours total (up to 14 weeks) fully remote.
Duration:
Phase I: Primary Adapter Build - 188 hrs | wks 3 - 8 of the project | 30 - 40 hrs / wk
Phase II: Retainer & QA Bug Fix Support - 76 hrs | wks 9 - 14 of the project | hrs likely to vary based on QA''s findings
Capacity: 264 hrs
Conversion: Moderate - Client has expressed interest in converting this individual if they are a solid C++/Swift engineer
Location: Remote, working Eastern Daylight hours preferred
Eligibility: Must be a Authorised to work in US without any sponsorship .
Equipment: Contractor will use their personal equipment; required software will be provided via cloud access
Required Skills
Strong modern C++ (C++17, which is the pinned dialect for this project): comfortable with templates, the STL, RAII, smart pointers, concurrency primitives, and exception-safe design
Shipped at least one iOS framework, library, or app that integrates a C++ codebase. You have seen an Xcode project with mixed .cpp, .hpp, .mm, and .h files and understand how they link together.
Comfortable with Objective-C++ (.mm) or willing to pick it up quickly. If you know C++ and can read Objective-C message-send syntax, you can write .mm productively within a day or two.
Xcode build system proficiency: cross-compilation targets, static library linking, framework packaging, build settings for C++ standard and ARC
Familiarity with Apple''s Automatic Reference Counting (ARC) and how it interacts with C++ object lifetimes inside .mm files
Debugging experience in constrained environments: iOS app extensions, embedded systems, browser sandboxes, or similar places where standard debugging tools are limited
Highly Valued (Not Required)
Direct experience with the OpenVPN 3 client library, or with other C++ VPN or tunneling libraries (WireGuard, strongSwan, OpenConnect)
Hands-on work with Apple''s Network Extension framework, particularly NEPacketTunnelProvider and NEPacketTunnelFlow
Experience cross-compiling C++ dependencies for iOS arm64 (mbedTLS, OpenSSL, Boost, ASIO, FFmpeg, OpenCV, or similar)
Prior work on iOS VPN, network security, packet processing, or protocol implementation products
Familiarity with ASIO (standalone or Boost.Asio) and its event loop model
Knowledge of the OpenVPN protocol (control channel, data channel, TLS handshake, push/pull options)
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