
Dmytro K.
Interactive Brokers API Developer and Python Trading Systems
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Algorithmic Trading Systems Developer
Freelance • Freiberufler
Jul 2025 - Present • 1 yr 1 mo
Design and operation of automated trading systems for US equities through the Interactive Brokers API, built to written specifications and run continuously on paper accounts. Responsibilities covered the full pipeline: broker connectivity and reconnect handling, market data collection and candle construction from tick streams, instrument screening across the full US equity universe, order execution with fill confirmation, position tracking, and monitoring dashboards. Also built a replay engine for testing trading logic against stored minute data using the same code that runs live, and a parameter sweep on top of it for validation across instrument groups and time periods. Deployment is self-hosted Linux with systemd services.