Principal SQL Server & AI Data Infrastructure Engineer

WEX; Chicago (IL); On-site; USD 166,000 - 204,000; Full time

Job summary

WEX is seeking a Principal Database Engineer to modernize and scale data platforms, emphasizing SQL Server and T-SQL. You will tackle performance, scalability, and modernization across enterprise environments while collaborating with AI-powered data infrastructure initiatives.

This senior role requires hands-on leadership, independent problem-solving, and ownership from design through production, with exposure to AI-enhanced database engineering and vector-based data tools.

Qualifications

• 15+ years of experience in database engineering or related field.
• Deep hands-on experience with Microsoft SQL Server and T-SQL including optimization.
• Experience modernizing legacy database systems and working with large-scale data environments.

Responsibilities

• Design, develop, and modernize large-scale SQL Server databases.
• Refactor complex T-SQL, stored procedures, and database logic.
• Analyze performance bottlenecks and apply indexing and tuning.
• Lead modernization initiatives and automation to maintain data integrity.

Skills

SQL Server

T-SQL

Python

C#

ETL/ELT

Data pipelines

Performance tuning

Automation

Big data

Tools

SQL Server

PostgreSQL

Snowflake

Azure/AWS data services

Job description

WEX is seeking a Principal Database Engineer to modernize and scale data platforms, emphasizing SQL Server and T-SQL. You will tackle performance, scalability, and modernization across enterprise environments while collaborating with AI-powered data infrastructure initiatives.

This senior role requires hands-on leadership, independent problem-solving, and ownership from design through production, with exposure to AI-enhanced database engineering and vector-based data tools.