Rastislav Kisel

Senior Software Engineer @Abnormal AI

London, GB

When I started, my focus was on building a storage layer for our custom ML feature store. Then I was a core engineer on the data integration platform team. I led the design, implementation, and migration to a new version of a platform for ingesting data that is powering several core company products. I am currently working for the Advanced Technologies Group team where I build out the infrastructure components for new company-wide projects. Cross-company cost optimizations: Spearheaded code optimization initiatives that reduced AWSoperational costs by millions of $ annually through strategic refactoring and infrastructure improvements. Email Integration with AWS: Led the company-wide initiative to standardize our email-relatedtechnologies, and subsequent implementation of a comprehensive platform solution for inbound andoutbound email. Data Ingestion Pipelines: Led the design and implementation of new data ingestion pipelines. Also spearheaded the migration of the old scheduling and ingestion processing to the new system. This layer handles 15k+ events per second and powers multiple downstream products, including account takeover detection and posture management. Feature implementation for ML models: Led the implementation of features for behavioral account takeover ML models. These features are the cornerstone of the logic for detecting account takeover attempts. ML feature store backend: Designed and implemented core storage layer for our custom ML features store. This storage layer currently handles 20k+ write and read requests per second. The features store is a foundational platform product for the entire company used by multiple ML teams.