Contratar vs. emplear

In Spanish, both 'contratar' and 'emplear' can be translated as 'to hire' when referring to workers. However, they have subtle differences in usage and connotation.

Contratar

'Contratar' is used more commonly in formal contexts to indicate the act of hiring someone for a job or a specific service. It often implies a contractual agreement.
La empresa decidió contratar a un nuevo gerente.
(The company decided to hire a new manager.)
Vamos a contratar a una agencia de publicidad para la campaña.
(We are going to hire an advertising agency for the campaign.)
Han contratado a varios desarrolladores de software este mes.
(They have hired several software developers this month.)

Emplear

'Emplear' is also used in the context of hiring but has a broader application. It not only means to hire someone but can also mean to utilize or employ methods, tools, or effort.
Decidieron emplear a más trabajadores temporales para el proyecto.
(They decided to employ more temporary workers for the project.)
Para resolver el problema, empleamos métodos innovadores.
(To solve the problem, we employed innovative methods.)
La fábrica emplea a más de 500 personas.
(The factory employs more than 500 people.)

Summary

'Contratar' and 'emplear' both refer to the act of hiring workers in Spanish, but 'contratar' is generally used in more formal contexts and often implies an official contract. 'Emplear', on the other hand, has a broader use that includes not just hiring someone but also using or utilizing resources like methods or tools.