This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer, Java | Mainline based in the United States. As a Senior Software Engineer, you will design and deliver scalable, high-performance software solutions that power a comprehensive IT operations platform. You will help develop and enhance mission-critical services used to manage and protect millions of endpoints and servers worldwide. Working with experienced engineers and cross-functional teams, you will influence architectural decisions, strengthen system reliability, and drive continuous product improvements. Your expertise in Java development and large-scale distributed systems will help ensure that applications remain secure, maintainable, and performant as the platform grows. You will also mentor fellow engineers, establish technical best practices, and take ownership of complex engineering initiatives. This remote-first opportunity combines meaningful technical challenges with a collaborative culture focused on quality, innovation, and customer success.