Functional testing
A system does not go in front of users until each function has been checked against what that user expects it to do.
Software consultancy
Software testing
A picture of quality you can act on: each function does what the user expects, and the infrastructure still stands on the day the load is nothing like an average Tuesday.
Performance testing
Stress testing finds the point where the system stops behaving. Load testing supports capacity planning, so you do not buy hardware the current architecture does not need. Endurance tests then run those loads across different user-behaviour scenarios to see what breaks slowly.
Isolation testing
A performance problem is usually one slow part hiding among many fast ones. We isolate components and test them on their own until the bottleneck has nowhere left to hide.
System and server monitoring
Servers and databases have a daily load shape. Watching queries and host metrics finds memory leaks and drops, and gives you a profile of what the current kit can actually do. That is operations work, and we do it. A penetration test of a live network belongs with a specialist firm.