**Job Description:** We are seeking a seasoned Backend Engineer to develop and optimize our digital advertisement platform. The ideal candidate will have extensive experience in PHP, AWS, and Kafka, with a strong focus on developing high-performance server-side logic, defining and maintaining central databases and message buses, and ensuring optimal performance and responsiveness of ad delivery systems. As a key member of our cross-functional team, you will collaborate with developers, product owners, and stakeholders to design and integrate elements, develop high-performance applications, implement effective security protocols, and provide technical support. Required Skills and Qualifications: