Since Managua is the capital of Nicaragua, the economy it's very active. People normally say "all the jobs are in Managua."
Yes, all the franchises are located in Managua, and all the buildings are in Managua, but the big investments are being made outside of Managua, for example Tola, San Juan del Sur.
A lot of investors are coming to Managua to start new business like real estate (construction and selling or renting), hotels, restaurants, and outsourcing. But of course there are many more business opportunities. The problem is finding the correct guide.