Jesenko Mehmedbašić is a pragmatic software developer with 11 years of experience building reliable systems across Rust, Java, TypeScript and JVM tooling, currently contributing at CrowdStrike after seven years working on blockchain, cryptography and MPC at Partisia. He combines deep backend and test-automation chops—evidenced by contributions to the widely used pitest mutation-testing project where he developed and validated a BigInteger mutator—with practical web and full-stack experience from roles at QIAGEN and Rambøll. Jesenko’s academic background in information science and computer science underpins a methodical approach to complex problems, where he prefers elegant, simple solutions. Based in Aarhus and originally from Yugoslavia, he brings broad cultural insight, an offbeat sense of humor, and unusual hobbies from electronics to carpentry that fuel his creativity and persistence.
11 years of coding experience
14 years of employment as a software developer
High School, High School at Langkær Gymnasium
Master of Science (MSc), Information Science/Studies, Master of Science (MSc), Information Science/Studies at Aarhus Universitet
State of the art mutation testing system for the JVM
Role in this project:
Back-end Developer & Test Automation Engineer
Contributions:18 commits, 1 PR, 3 comments in 19 days
Contributions summary:Jesenko primarily focused on developing and testing a BigInteger mutator for the pitest mutation testing system. Their work involved creating tests for various BigInteger methods like add, subtract, multiply, and modulo, ensuring the correct mutation behavior. The user implemented new test cases to cover additional BigInteger methods, including shiftLeft, shiftRight, and bit manipulation operations. This involved modifications to existing code and the addition of test classes to validate the mutation logic of the BigInteger mutator.
Contributions:1 release, 25 commits, 16 pushes in 6 months
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Jesenko Mehmedbašić - Software Developer at CrowdStrike