Extended career log: https://michal.piekarczyk.xyz/bragdoc/
Senior ML Platform Engineer (internal title: Senior Cognitive Machine Learning Professional), humana.com, 2021-Present
Member of a 10 person ML Platform team supporting dozens of Databricks predictive model use cases. Partner with data scientists from onboarding through production, reviewing models for reproducibility, bias, readability, stability, observability, memory footprint, and performance, and helping resolve production issues during on-call rotations.
Spend roughly half my time improving the platform to make onboarding and operating models simpler.
Engineer, part time, enjoyapp.io, 2024
Built the restaurant dish data model and successive generations of semantic dish search combining vector similarity and geospatial ranking. Evaluated embedding models, developed search quality benchmarks, and iterated on retrieval approaches across PostgreSQL/pgvector and hosted search infrastructure.
Senior Data Scientist, katapult.com, 2014 - 2021
Joining as 2nd Engineering hire, then moving to the data science team. Built and upgraded ML infrastructure, through various growth phases of the company.
Refactored underwriting into a separate API consumed by the application, containerized systems for reproducibility, split parts of the pipeline into independently deployable services, replicated infrastructure across availability zones after holiday retail outages, and introduced data drift detection and monitoring.
Wore multiple hats, from retraining a core model when major business changes arose to simplifying models and code paths when operational speed and reliability became the priority.
VP and Software Lead, Cortix Systems Inc, 2011 - 2014
Lead system and software engineer responsible for taking initial search engine for data company concept into a Python code base (with a demo helping us secure a $720,000 contract) and iterating it through several subsequent stages of customer validation.
Security Event Handler, City of New York, 2009 - 2011
Student, NYU Polytechnic School of Engineering, 2003 - 2008
Earning Bachelor of Science magna cum laude in Computer Engineering, as well as Master of Science in Electrical Engineering.
Study abroad student, University of Sheffield, UK, Spring 2005
Global Engineering Education Exchange (Study Abroad Program)