Worked on enhancing the JAX backend by enabling new operations within the Pallas fuser component in the jax-ml/jax repository. Focused on compiler design and Python, the work involved adding support for not equal and absolute value operations, broadening the range of operations handled during compilation and transformation passes. These additions were carefully registered and integrated into the fuser pipeline to ensure correct dispatch and optimization of fused kernels. By increasing the operation coverage, the changes improved the correctness and reliability of kernel fusion, laying groundwork for future performance improvements in JAX’s compilation and transformation workflows.