During May 2025, this developer delivered a VHDL testbench for the InvSubBytes module in the Matziaz/TE2002B repository, focusing on establishing early verification coverage before synthesis. Their approach involved designing a stimulus-driven environment using clock and enable signals, validating the module’s functional behavior with a targeted test case. By integrating the testbench into version control, they laid the groundwork for automated regression and future feature verification. The work demonstrated proficiency in digital design, hardware description languages, and testbench development, reducing integration risk and enabling faster verification cycles. No major bug fixes were required, reflecting a focused and foundational engineering contribution.