I will write a complete unit testing suite for your codebase, mutation tested

Most test suites prove the code runs. They do not prove it is right. I write tests that fail when the behaviour breaks, which is a different and harder thing.

Premium includes a mutation testing report: I deliberately break your code in hundreds of small ways and show you which breaks your tests caught and which slipped through. That tells you something a coverage percentage cannot. You can have 90% coverage and tests that would not notice a bug.

I run agent swarms to generate and check these, so you get a full suite in days rather than weeks, and the mutation report is the evidence it is worth having.

Eight years of backend and data engineering at an enterprise data company, where I resolved 107 production incidents, 34 of them at P1 or P2, with none left open. Every fix shipped with a test that failed before it and passed after.

Java, TypeScript, Python. You get the suite, a CI config to run it, and a short note on what is covered and what deliberately is not.

Tell me your language and roughly how big the codebase is, and I will tell you honestly what is worth testing first.