A Senior SQL Developer is responsible for designing, developing, and optimizing database solutions to support applications and business processes. They write complex SQL queries, create stored procedures, and ensure database performance and security. Additionally, they collaborate with developers, analysts, and business teams to translate requirements into efficient database solutions. Experience with database management systems like SQL Server, MySQL, or PostgreSQL is essential. They may also be involved in data modeling, ETL processes, and automation tasks to improve data handling efficiency.