"internally built" is a correct and usable phrase in written English.
It is used to describe something that was created or constructed within a certain system or organization. For example, you could say, "The company has developed an internally built system for tracking customer orders."
The whole site is powered by an internally built custom CMS designed for scalability.
An example of a hybrid cloud solution is the merging of an internally built or private cloud infrastructure with a security vendor's public network of threat intelligence.
"We've had it internally built and in testing for quite a while," Dropbox product head ChenLi Wang said.
He added that the platform is something that makes the company different, with "all three technology stacks internally built".
Although for the performance tests we send messages composed of 8-bit ASCII characters, CMQ is internally built with polymorphic functions and can transfer arbitrary Haskell Data Types under the condition that they can be serialized.
That was part of the reason that it pulled support for Apple's internally built YouTube app, and created its own version.
He says "We know we're already late" and "Instead of buying an existing social networking destination…the decision was made to internally build the platform grounds up".
Sion said that the company is trying to internally build a system that allows the company to quickly integrate new forms of transportation, like bike-sharing, at a technical and product level.
Instead of buying an existing social networking destination (Digital Media evaluated some candidates back in the summer before I joined the team), the decision was made to internally build the platform grounds up – we do have a few 3rd party partners to give us a jump start.
During the first phase, an agent internally builds up a single bundle containing all the tasks it plans to complete and updates it as the assignment process progresses.
If you deal with something internally, it builds up and explodes.
