Technical skills: Java, Python, Gradle, JSON, XML, CSV, custom data formats, MongoDB (development and administration), MongoDB Java/Python drivers, Linux (system administration and shell scripting), RPM-based package management (yum, dnf, rpm), service management (systemd), Git (branching, pull requests, code reviews). Key responsibilities include designing and implementing data ingestion and transformation logic, creating and maintaining shared libraries for common data formats, ensuring performance and scalability, and contributing to architectural decisions around data modeling and integration patterns.