Worked on the ecmwf/eccodes repository to enhance data processing workflows by improving missing value handling in GRIB file geopotential conversions and complex spatial differencing. Applied C++ and shell scripting skills to update core components, specifically refining DataG22OrderPacking.cc for more accurate geopotential data and addressing edge cases in grib_complex_spatial_differencing. Introduced targeted tests to guard against non-existent accessors, reducing runtime errors and increasing reliability. Focused on robust file handling and comprehensive testing, these contributions improved data integrity for downstream analytics and forecasting. The work demonstrated a methodical approach to stability, traceability, and maintainability in critical scientific data pipelines.