Databricks Migration Engineer

Overview - Tier One Technologies is seeking a Databricks Migration Engineer to support our US Government client. - This remote Contract-to-Hire position will be originated in Rosslyn, VA. Washington DC area and East Coast time zone candidates preferred. - Must be a US Citizen. - SELECTED CANDIDATES WITHOUT REQUIRED CLEARANCE WILL BE SUBJECT TO A FEDERAL GOVERNMENT BACKGROUND INVESTIGATION TO RECEIVE IT. Responsibilities - Lead the technical migration from legacy SQL Server stored procedures and ADF pipelines to Databricks Lakehouse (Delta Lake), ensuring best practice Lakehouse design. - Translate traditional relational data warehousing paradigms into scalable, distributed Lakehouse frameworks (Bronze, Silver, Gold). - Design robust, reusable ETL/ELT frameworks using PySpark, Delta Live Tables (DLT), and Databricks Workflows. - Architect and refine the Gold Layer (dimensional models, star schemas) specifically to maximize Power BI performance. - Optimize Databricks SQL Warehouses to support high-concurrency, low-latency Power BI queries (DirectQuery and Import modes). - Implement advanced optimization techniques, including Z-Ordering, data skipping, liquid clustering, and materialized views. - Define and enforce governance standards for cluster sizing, auto-scaling policies, and serverless SQL compute to balance performance with cost. - Implement proactive monitoring dashboards to track Databricks Unit (DBU) consumption and identify cost-saving opportunities. - Establish best practices for partition strategies and file size management within Delta Lake. - Design and implement a robust data security model using Unity Catalog for centralized governance. - Enforce row-level and column-level security policies to ensure compliant data access for Power BI consumers and internal analysts. - Align the Lakehouse security architecture with existing enterprise Azure Active Directory (Microsoft Entra ID) and RBAC standards. - Act as the primary technical lead, conducting dedicated pair-programming sessions, workshops, and code reviews to transition the team from SQL-centric to Spark-centric thinking. - Create comprehensive technical documentation, including architecture diagrams, design patterns, and optimization playbooks. - Build a foundational knowledge transfer framework to ensure the internal team is fully self-sufficient post-migration. - Communicate effectively verbally and in written form to both technical and non-technical audience - Work in an organized fashion, completing tasks timely while paying close attention to details Qualifications - Bachelor's degree or higher from an accredited college or university in Computer Science, Engineering, or a related technical field. - 5+ years of experience in Data Engineering, Data System Development or related roles. - 5+ years of experience with Cloud platforms (e.g. Azure, AWS, GCP). - 1+ year leading complex, cross-functional data projects and technical teams. - Experience with Databricks Lakehouse, Apache Spark, Delta Lake, cloud-native databases, storage solutions, and distributed compute platforms. - Experience with data warehousing, dimensional modeling, enterprise data lakes, incremental data loads, and metadata-driven ingestion and data quality frameworks using PySpark. - Excellent communication skills. - Must be a US Citizen and be able to obtain a Position of Public Trust Clearance. - Must have resided in the US for the last 5 years and not have traveled outside the US for a combined total of 6 months or more in last 5 years.

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