Senior SQL Developer: Performance & Data Modeling

Quantum Technologies. LLC; Columbus (OH); On-site; USD 90,000 - 120,000; Full time

Job summary

Quantum Technologies LLC is seeking an experienced SQL Developer to design, develop, optimize, and maintain database solutions that support enterprise applications and business reporting. You will write complex SQL queries, develop stored procedures, and manage database performance to ensure data accuracy and availability.

The role requires strong SQL and relational database skills, familiarity with multiple platforms (SQL Server, Oracle, PostgreSQL, MySQL), and experience with BI reporting

Qualifications

• 4+ years of experience in SQL development or database engineering.
• Strong experience working with enterprise relational databases.
• Demonstrated ability to develop complex queries and troubleshoot performance issues.
• Understanding of database architecture and software development lifecycle practices.
• Strong analytical, debugging, and problem-solving skills.
• Ability to manage multiple development tasks and collaborate with technical teams.

Responsibilities

• Develop and maintain complex SQL queries, stored procedures, and database functions.
• Design and optimize database structures to support application requirements.
• Analyze query execution plans and improve database performance.
• Troubleshoot database issues and resolve data-related defects.
• Build and maintain data extraction, transformation, and loading processes.
• Perform data validation, reconciliation, and integrity checks.
• Support database migrations, upgrades, and application integrations.
• Collaborate with developers, data analysts, and business teams to understand data requirements.
• Maintain database documentation and follow established development standards.
• Ensure data security, consistency, and reliability across database environments.

Skills

SQL development

Relational databases

Query optimization

Stored procedures / functions

Data modeling

ETL processes

Reporting tools knowledge

Python / scripting

Education

Bachelor's degree in Computer Science / IT / related field

Master's degree preferred

Tools

Microsoft SQL Server

Oracle

PostgreSQL

MySQL

Power BI

SSRS

Tableau

Python

PowerShell

Job description

Quantum Technologies LLC is seeking an experienced SQL Developer to design, develop, optimize, and maintain database solutions that support enterprise applications and business reporting. You will write complex SQL queries, develop stored procedures, and manage database performance to ensure data accuracy and availability.

The role requires strong SQL and relational database skills, familiarity with multiple platforms (SQL Server, Oracle, PostgreSQL, MySQL), and experience with BI reporting