Toptal: Senior SQL Developer

Salary: Not specified

Location: Remote with 2-3 days in-office (Ramapo, New York, United States)

Introduction

Do you have a passion for optimizing SQL environments and improving system reliability? Are you an expert in diagnosing and resolving performance issues? If so, we have the perfect opportunity for you. Toptal, a well-established healthcare technology and services organization, is seeking a Senior SQL Developer to join their team. This is a remote position with the option to work in-office 2-3 days a week in Ramapo, New York.

About the Company

Toptal is a leading company in the healthcare industry, specializing in workforce management, payroll, and compliance solutions for regulated environments. With a focus on innovation and excellence, they have become a trusted partner for many organizations in the healthcare sector. As a company, Toptal values diversity, collaboration, and growth, creating a dynamic and inclusive work environment for its employees.

Key Responsibilities

• Conduct a full performance audit of existing SQL queries, stored procedures, and reporting pipelines
• Optimize slow-performing queries, multi-table joins, window functions, and Entity Framework-generated SQL
• Diagnose and resolve locking, blocking, and deadlock conditions
• Improve indexing strategy, query plans, and concurrency handling
• Optimize Entity Framework usage patterns and reduce unnecessary DB roundtrips
• Review and optimize SQL interactions within API calls and background jobs
• Implement monitoring to track query health, performance regressions, and long-running jobs
• Provide documentation and knowledge transfer to internal engineering leadership

Requirements

• Expert-level SQL skills with proven experience optimizing complex queries at scale
• Strong experience with locks, blocking, deadlocks, and concurrency patterns
• Hands-on experience tuning stored procedures, CTEs, and window functions
• Experience with C#/.NET and Entity Framework performance tuning
• Familiarity with high-concurrency systems and background job processing
• Experience working with SQL performance tools (Query Store, Profiler, Execution Plans)

Nice to Have

• Experience optimizing large reporting workloads
• Familiarity with Angular-based frontend environments
• Experience scaling systems with thousands of concurrent users
• Experience with ETL pipelines or job schedulers in .NET ecosystems

Perks and Benefits

• Competitive salary
• Remote work with the option to work in-office 2-3 days a week
• Opportunity to work with a leading company in the healthcare industry
• Collaborative and inclusive work environment
• Potential for contract extension after initial 3-6 month period

Apply here