A full stack engineer is a type of software engineer who works on both the front-end and back-end of software. They are focused on the entire software development process and are skilled across different software parts. Full-stack engineers are involved in each stage of software development, including data structure completion, architecture design, code review, performance evaluation, internal tool management, and updates. They write various high-level and low-level code, troubleshoot errors, help design the user experience (UX), resolve bugs, and improve the overall efficiency of the software. Full-stack engineers need excellent collaboration skills because they work with front- and back-end development team members. They are typically familiar with popular programming languages such as JavaScript, Node.JS, SQL, Express.JS, and React. However, full-stack engineers are not often a master of one part of the software, like a front-end engineer is with the user side or a security engineer is with the software’s cybersecurity solutions.