Senior Data Engineer — Secure AI Data & RAG Workflows

Expression; Arlington (VA); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

401k matching

PPO/HDHP medical/dental/vision

Education reimbursement up to $10,000/

Life insurance

Generous PTO and holidays

Commuter Benefits Plan

Job summary

Expression is seeking a Senior Data Engineer to design, develop, and integrate secure enterprise data services supporting AI and LLM capabilities for DHS. The role focuses on governed data integrations with Palantir, Databricks, and Elasticsearch to enable secure AI agents and RAG workflows.

The ideal candidate will be hands-on with data integration, API development, data modeling, and secure data access. You will work with AI engineers and Government stakeholders to ensure reliable,

Qualifications

• Bachelor's degree or equivalent professional experience in a technical field.
• 7+ years in data engineering or enterprise data integration, with 3+ years hands-on pipeline/API work.
• Strong SQL and Python with data querying, transformation, and automated testing.
• Experience designing secure data exchanges and RESTful APIs between apps.
• Hands-on experience with Palantir, Databricks, or Elasticsearch.

Responsibilities

• Design, develop, and maintain secure data integrations connecting data platforms with AI workflows.
• Develop APIs, data connectors, and retrieval services for enterprise data sources.
• Implement data access controls, provenance, and lineage across data pipelines.
• Support RAG workflows, intelligent search, and source-grounded AI applications.
• Collaborate with AI engineers, platform owners, and stakeholders to ensure secure data access.

Skills

SQL

Python

Security & governance

Data integration

API development

Data modeling

Data quality

Cloud experience

Collaboration with AI engineers

Education

Bachelor's degree in Computer Science, Information Systems, Data Engineering, Software Engineering, Data Science, or related field

Tools

Palantir

Databricks

Elasticsearch

Git

Job description

Expression is seeking a Senior Data Engineer to design, develop, and integrate secure enterprise data services supporting AI and LLM capabilities for DHS. The role focuses on governed data integrations with Palantir, Databricks, and Elasticsearch to enable secure AI agents and RAG workflows.

The ideal candidate will be hands-on with data integration, API development, data modeling, and secure data access. You will work with AI engineers and Government stakeholders to ensure reliable,