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C++ Software Engineer (AI modernization)

Doran Jones

Salary not specified
Dec 23, 2025
Dallas, TX, US
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Modernize a legacy C++ application into a modular, maintainable, and scalable product by integrating Generative AI to reverse-engineer complex codebases and define strategies for forward-engineering into modern languages.

Requirements

  • 5+ years of experience with C++, including Modern C++ (C++11/14/17; C++20 preferred).
  • Proven track record of modernizing large, tightly-coupled codebases.
  • Strong mastery of OOP, SOLID principles, and clean architecture.
  • Advanced skills using gdb, lldb, or Visual Studio debugger for crash analysis and core dumps.
  • Proficiency with CMake is strongly preferred.
  • Firm grasp of data structures, algorithms, and performance optimization.

Responsibilities

  • Partner with GenAI teams to trace execution paths, uncover implicit behaviors, and identify side effects within large legacy monoliths.
  • Build comprehensive system documentation, including component diagrams, sequence flows, dependency maps, and API contracts derived from existing code.
  • Define the target architecture and migration phases, using patterns such as the Strangler Fig Pattern for incremental re-platforming.
  • Create and refine LLM prompts and retrieval contexts to accelerate code understanding, while validating GenAI outputs to ensure functional parity.
  • Convert legacy C++ constructs (memory handling, concurrency, state management) into modern equivalents in the target language.
  • Identify hidden dependencies and concurrency hazards.
  • Drive characterization testing and build regression suites and "golden datasets" to verify behavior during migration.

Other

  • We are looking for an experienced C++ Engineer to lead the modernization of a legacy C++ application into a modular, maintainable, and scalable product.
  • This role is unique in its integration of Generative AI.
  • You will partner with a GenAI engineering team to reverse-engineer complex codebases and define strategies for forward-engineering into modern languages.
  • Ensure the new system meets SLAs for performance, security, and observability.
  • McLaren is a certified minority owned business through the NMSDC and has a mission to place more people from non-traditional backgrounds into sustainable technology careers.