Senior Application Developer Consultant – Inline SQL Remediation

HIKINEX

Senior Application Developer Consultant focusing on Inline SQL Remediation for a government client. Emphasis on full-stack .NET development and PostgreSQL migration.

Posted 7/2/2026contractRemote • Maryland • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

Entity Framework.NETPostgresSQL

About the role

Key responsibilities & impact

Develop and maintain enterprise applications using C# and .NET technologies.
Refactor embedded and inline SQL within application code to support PostgreSQL compatibility.
Modernize data access layers using ADO.NET, Entity Framework, and Dapper.
Migrate SQL Server-based applications and database integrations to PostgreSQL.
Convert T-SQL queries and database logic to PostgreSQL-compatible syntax.
Update connection strings, credentials, and database access configurations.
Perform application testing, debugging, and performance optimization throughout migration efforts.
Collaborate with cross-functional teams to deliver scalable, secure, and high-quality application modernization solutions.

Requirements

What you’ll need

5+ years of full-stack .NET development experience.
Strong hands-on experience with:
C# and .NET application development
ADO.NET / System.Data.SqlClient and Npgsql
Entity Framework (EF6 and EF Core)
Dapper and data access layer development
SQL Server and PostgreSQL database integration
Refactoring embedded and inline SQL within application code
Experience migrating or converting:
SQL Server-based applications to PostgreSQL
Connection strings, credentials, and database access layers
T-SQL queries to PostgreSQL-compatible syntax
Strong understanding of application-to-database interactions, testing, troubleshooting, and performance optimization.

Benefits

Comp & perks

Candidates must be U.S. Citizens or U.S. Permanent Residents (Green Card holders) authorized to work in the United States without current or future visa sponsorship.
Willing to support and work with a government client.
Willing to undergo fingerprinting as part of the onboarding process.
Must successfully complete a government background investigation (CJIS-type clearance).

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C#.NETADO.NETEntity FrameworkDapperPostgreSQLSQL ServerT-SQLDatabase MigrationPerformance Optimization

Soft Skills

CollaborationTroubleshooting