.Net Developer

Recruitment.ai; San Jose (CA); On-site; USD 120,000 - 170,000; Full time

Job summary

Recruitment.ai in San Jose, CA seeks a SQL/EF performance engineer to identify slow queries and optimize EF to generate efficient SQL. You will diagnose database performance, tune queries and indexes, and work with AWS RDS/SQL Server to improve reliability. This role emphasizes building, testing, and deploying performance improvements across the stack.

Candidates have 4-6+ years of C#/.NET, strong EF expertise, and proven SQL Server/T-SQL skills. AWS RDS experience is preferred.

Qualifications

• 4-6+ years of C# / .NET Framework experience.
• Strong Entity Framework expertise.
• Advanced SQL Server / T-SQL skills.
• Proven experience diagnosing and improving database performance.
• Experience with query optimization, execution plans, and indexing.
• AWS RDS for SQL Server experience preferred.

Responsibilities

• Identify slow or high-impact SQL queries and trace them back to C# / Entity Framework code.
• Optimize Entity Framework implementations and convert to efficient SQL where appropriate.
• Tune SQL queries and database indexes.
• Investigate database timeouts and performance issues.
• Assess AWS RDS / SQL Server performance.
• Build, test, and deploy performance improvements.

Skills

C# / .NET

Entity Framework

SQL Server / T-SQL

Database performance

Query optimization

AWS RDS for SQL Server

Job description

Responsibilities

• Identify slow or high-impact SQL queries and trace them back to C# / Entity Framework code.
• Optimize Entity Framework implementations and convert to efficient SQL where appropriate.
• Tune SQL queries and database indexes.
• Investigate database timeouts and performance issues.
• Assess AWS RDS / SQL Server performance.
• Build, test, and deploy performance improvements.

Requirements

• 4-6+ years of C# / .NET Framework experience.
• Strong Entity Framework expertise.
• Advanced SQL Server / T-SQL skills.
• Proven experience diagnosing and improving database performance.
• Experience with query optimization, execution plans, and indexing.
• AWS RDS for SQL Server experience preferred.