Java, Performance Tuning, shell scripting, Python, latency optimisation, electronic trading platforms, Linux Unix environments, q programming language, time-series databases, high-performance data processing, real-time market data feeds, low-latency high-throughput distributed systems, Profiling

System Design, Data Modeling, Application Architecture, Performance Tuning, time-series data processing, data management principles, ingestion and storage strategies, q language, high-availability architectures