Senior SQL Developer

Harmonia Holdings Group LLC; McLean (VA); On-site; USD 100,000 - 130,000; Full time

Job summary

A leading company in federal government contracting seeks a Senior SQL Developer to enhance database systems supporting critical applications. This role involves advanced SQL development, cloud migration to AWS, and ensuring compliance with federal standards. Ideal candidates will have extensive experience in SQL and a strong background in government regulations.

Benefits

Innovative work environment

Employee satisfaction initiatives

Qualifications

• Minimum of 8 years in SQL development with progressive responsibilities.
• Deep expertise in complex SQL query design, optimization, and debugging.
• Experience in government or highly regulated sectors.

Responsibilities

• Craft efficient and optimized SQL queries and stored procedures.
• Collaborate with application developers for system integration.
• Lead efforts in moving legacy systems to AWS cloud databases.

Skills

SQL Development

Performance Tuning

Cloud Migration

Database Security

Documentation

Tools

AWS RDS

Aurora PostgreSQL

Oracle

SQL Server

MySQL

Job description

Harmonia Holdings Group, LLC

Harmonia Holdings Group, LLC is an award-winning, rapidly growing federal government contractor committed to providing innovative, high-performing solutions to our government clients. We focus on fostering a workplace that encourages growth, initiative, creativity, and employee satisfaction.

The Senior SQL Developer will play a key role in building and maintaining secure, high-performing database systems that support mission-critical government applications. Operating within a remote, clearance-sensitive environment, this individual will drive database modernization efforts—including cloud migration to AWS RDS and Aurora PostgreSQL—while ensuring compliance with federal security and data governance standards.

Responsibilities

1. Advanced SQL Development: Craft efficient and optimized SQL queries, stored procedures, functions, and views tailored to complex data processing needs.
2. System Integration: Collaborate with application developers to embed database logic seamlessly into applications.
3. Performance Tuning: Analyze and resolve performance bottlenecks across development, testing, and production stages.
4. Cloud Migration: Support and lead efforts in moving legacy systems to AWS cloud databases like RDS or Aurora PostgreSQL.
5. Compliance & Security: Ensure all development aligns with federal data governance, access control, and security standards.
6. Documentation: Create and update comprehensive documentation such as data dictionaries, SOPs, and runbooks.
7. Mentorship: Provide technical guidance and mentorship to junior database developers and enforce best practices.

Minimum Qualifications

• Minimum of 8 years in SQL development with progressive responsibilities.
• Deep expertise in complex SQL query design, optimization, and debugging.
• Experience working in government or highly regulated sectors.
• Ability to collaborate across development, infrastructure, and security teams.
• Strong knowledge of database security, access control, and regulatory compliance.
• Analytical mindset for diagnosing and resolving issues under pressure.
• Excellent skills in creating detailed documentation for auditing, training, and operational continuity.

Preferred/Bonus Skills

• Proven success in migrating systems to AWS RDS or Aurora PostgreSQL.
• Familiarity with Oracle, SQL Server, MySQL, or similar platforms.
• Exposure to DevOps practices and CI/CD tools for managing database changes.
• Experience with ticketing and reporting tools like ServiceNow and generating audit-ready documentation.
• Understanding of Agile or Scrum methodologies.

About Harmonia

We are proud of our outstanding work culture and numerous recognitions, including:

• Top 20