Depth in distributed systems: consensus, partitioning, replication, fault tolerance Experience with columnar formats such as Parquet or ORC and low-level encoding strategies Understanding of metadata-driven architectures and adaptive query planning Production experience with Spark, Flink, or custom distributed engines on cloud object storage Proficiency in Java, Rust, Go, or C++ with an emphasis on clarity and quality Curiosity about theory of the mathematics of compression, entropy, and learning efficiency A builder’s mindset: pragmatic, rigorous, and grounded in long-term systems thinking