Hiring both manual and automated testing developers brings a balance of human intuition and machine efficiency to your testing process.
Manual testing developers can understand application behavior, provide user perspective, and adapt to changes in real-time. They can handle exploratory, usability, and ad-hoc testing, which are hard to automate. They also play a crucial role in identifying visual and layout issues, understanding the context, and providing immediate feedback.
On the other hand, automated testing developers can significantly speed up the testing process, reduce human error, and increase repeatability. They can easily handle repetitive tasks, regression tests, load tests, and performance benchmarks. Automated tests can be run during non-working hours, ensuring / productivity. Moreover, they can also help in maintaining software quality by ensuring that new changes don't break existing functionalities.
In essence, having both manual and automated testing developers allows you to maximize test coverage, efficiency, and reliability. They complement each other in a way that manual testers can handle tasks requiring human judgment and creativity, while automated testers can handle tasks requiring speed, precision, and repeatability. This combination ensures that your software is thoroughly tested and of the highest quality.