Database Engineer

Harbinger Systems; United States; Remote; USD 110,000 - 140,000; Full time

Job summary

Harbinger Systems is seeking a skilled Database Administrator/Developer to design, optimize, and maintain robust database solutions across PostgreSQL, SQL Server, Oracle, MySQL, and MongoDB. You will collaborate with development and infrastructure teams to ensure performance, security, and data integrity.

The role involves tuning, backup/recovery planning, and implementing automation and monitoring tools to support smooth deployments and migrations.

Qualifications

• Experience designing robust database solutions and optimizing performance.
• Proficient with PostgreSQL and PL/pgSQL programming.
• Strong knowledge of SQL Server, Oracle, MySQL or MongoDB is a plus.

Responsibilities

• Design, develop, and maintain robust database solutions.
• Manage and administer databases such as SQL Server, Oracle, MySQL, PostgreSQL, or MongoDB.
• Monitor performance and implement tuning strategies.
• Backup, recovery, replication, and disaster recovery planning.
• Ensure security, compliance, and data integrity.
• Troubleshoot issues and analyze root causes.
• Develop and optimize complex SQL queries, procedures, and triggers.
• Support deployments and migrations.
• Implement monitoring and automation solutions.
• Collaborate with development, infrastructure, and business teams.
• Create and maintain technical documentation and procedures.

Skills

PostgreSQL PL/pgSQL

C# / .NET

ADO.NET / Npgsql

Query tools

Version control

Deployment IIS

Migration tools

Monitoring

AI-assisted SQL tools

Tools

pgAdmin

DBeaver

SQL Profiler

EXPLAIN ANALYZE

Flyway

Liquibase

Git

SVN

TFS

Copilot / Claude Code

Job description

Job Description:

• Design, develop, and maintain robust database solutions.
• Manage and administer databases such as SQL Server, Oracle, MySQL, PostgreSQL, or MongoDB.
• Monitor database performance and implement tuning strategies to improve efficiency.
• Perform database backup, recovery, replication, and disaster recovery planning.
• Ensure database security, compliance, and data integrity.
• Troubleshoot database issues and provide root cause analysis.
• Develop and optimize complex SQL queries, stored procedures, functions, and triggers.
• Support application teams during deployments and database migrations.
• Implement database monitoring and automation solutions.
• Collaborate with development, infrastructure, and business teams to meet data requirements.
• Create and maintain technical documentation and operational procedures.

Skills Required:

• Database: PostgreSQL (PL/pgSQL) stored procedures, functions, triggers, views, query optimization
• Backend: C# / .NET Framework (ASP.NET Web Forms) — for procedure integration with application layer
• Data Access: ADO.NET / Npgsql (PostgreSQL .NET driver)
• Tools: pgAdmin / DBeaver (query & schema management), SQL Profiler / EXPLAIN ANALYZE (performance tuning)
• Version Control: Git / SVN / TFS (for SQL script & procedure versioning)
• Deployment: IIS (Windows hosting), Windows Server
• Database migration/versioning tools (e.g., Flyway, Liquibase, or custom scripts)
• Monitoring: pg_stat_statements, log-based query analysis
• AI-assisted SQL tools (Copilot/Claude Code) for procedure debugging & optimization