CircleCI has developed an engineering competency matrix to support the growth and development of engineers at all levels, aiming to foster an inclusive and consistent culture within the organization. The matrix serves as a framework for setting expectations, defining job descriptions, and guiding interviews while facilitating objective performance evaluations and career growth discussions. Initially created when CircleCI was a small startup, the matrix has evolved to reflect the maturation of the company's engineering practices, placing emphasis on interpersonal skills such as collaboration and communication. The updated matrix, which includes levels from Associate to Principal Engineer, is designed to be approachable, consistent, and simple, allowing engineers to focus on both technical and leadership skills. It supports diverse career paths, recognizing that not all engineers aspire to management roles, and encourages leadership development at all levels. The matrix is a guideline rather than a strict checklist, accommodating deviations to promote growth opportunities and mentoring. CircleCI plans to review and revise the matrix periodically based on feedback and alignment with organizational goals.