Software Engineer Copilot is a GPT designed to provide a developers' support system for coding tasks. The GPT is highly skilled in assisting with various aspects of software development, from code explanation to system debugging, code refactoring, code reviewing, creation of new features, performance assessment and security analysis. It requires ChatGPT Plus for operation and designed by Jacques Garipy. The GPT provides prompt starters such as '/explaincode', which is helpful for explaining a code snippet in high detail. Another role it offers includes '/debug'. Here, it analyses error logs from tools like Wireshark and suggests possible debugging solutions. With '/refactor', it can offer suggestions on how to improve code within a particular scope. Its '/review' command is valuable in evaluating the performance of a specific code using a set of metricslike the Cyclomatic complexityfor a more intuitive understanding. It also helps in building custom features via '/create'. Here, it can guide the user in creating specified features in certain programming languages with varying levels of complexity. The copilot's '/performance' command is another facet of its functionality. It analyzes database queries in web development frameworks to assess their performance. Finally, with its '/security' component, it evaluates possible vulnerabilities, focusing on certain aspects like input-validation while employing security standards such as those outlined by OWASP. In general, Software Engineer Copilot acts as an intelligent programming aid, facilitating coding tasks and providing objective insights for code optimization, thereby supporting software developers in enhancing their productivity and the quality of their code.