An Erlang Developer is a software engineer who specializes in using the Erlang programming language to build scalable, concurrent, and fault-tolerant systems. Erlang is commonly used in telecommunications, messaging platforms, distributed systems, and real-time applications. Developers in this role design, write, test, and maintain applications that require high availability and responsiveness. They also optimize system performance, debug issues, and collaborate with teams to implement architectural improvements. Typically, an Erlang Developer must have expertise in functional programming, OTP (Open Telecom Platform), and distributed computing principles.