Alex Oltean focused on improving the correctness and stability of the proof trace writer in the runtimeverification/llvm-backend repository. During this period, Alex addressed a critical bug by introducing a pending rewrite callback flag and implementing conditional callback invocation based on event arity. This approach ensured that side_condition_event_callback was triggered only when appropriate, while rewrite_event_callback handled other cases, reducing erroneous rewrite events. Working primarily in C++ and leveraging strong bug fixing and software development skills, Alex’s contributions enhanced the reliability of proof traces. The work reflected a deep understanding of maintainability and correctness, aligning with the team’s engineering priorities.