**Company Overview** NTT DATA strives to hire exceptional, innovative, and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now. NTT DATA's Client is currently seeking a professional to join their team in Addison, Texas (US-TX), United States (US). **Job Summary** We are seeking a highly experienced professional with deep expertise in query optimization, performance tuning, and refactoring complex database code, along with a strong understanding of how APIs interact with SQL Server stored procedures and databases. The ideal candidate will work closely with application, API, and DBA teams to ensure that database logic is efficient, scalable, and correctly consumed by upstream services. This role plays a key part in improving performance, reliability, and maintainability across database-driven applications. **Key Responsibilities** + **SQL Server Development & Optimization** + Analyze, optimize, and tune complex T-SQL queries for performance and scalability + Refactor and rewrite legacy stored procedures, views, functions, and triggers to improve execution efficiency and maintainability + Optimize database access patterns used by API-driven applications + Design and optimize indexing strategies (clustered, non-clustered, filtered as appropriate) + **Performance Tuning & API Interaction** + Identify performance bottlenecks caused by API call patterns, excessive round-trips, or inefficient parameter usage + Tune stored procedures consumed by RESTful or service-based APIs + **Code Quality & Standards** + Enforce T-SQL best practices and performance-focused coding standards + **Collaboration & Communication** + Collaborate with API and application developers + Provide guidance on best practices for calling stored procedures from APIs + Clearly communicate database performance findings and recommendations to both technical and non-technical stakeholders **Required Skills & Qualifications** + 5 yrs expertise in Microsoft SQL Server (2016–2022) + 5 yrs proficiency in T-SQL + 3 yrs experience in query optimization and performance tuning + 3 yrs hands-on experience rewriting complex stored procedures, views, functions, and triggers + 3 yrs solid understanding of API-to-database interaction patterns (e.g., REST APIs calling stored procedures) + Strong knowledge of execution plans, indexing strategies, statistics, and SQL Server optimizer behavior **Soft Skills** + Excellent communication skills, especially when working with application and API teams + Strong analytical and troubleshooting abilities + Ability to work independently while collaborating across teams + Proactive mindset toward performance and reliability improvements Where required by law, NTT DATA provides a reasonable range of compensation for specific roles. The starting hourly range for this role is **(HOURLY RATE $50 TO $60).** Actual compensation will depend on several factors, including the candidate’s relevant experience, technical skills, and other qualifications. This position is eligible for company benefits that will depend on the nature of the role offered. Company benefits may include medical, dental, and vision insurance, flexible spending or health savings account, life, and AD&D insurance, short-and long-term disability coverage, paid time off, employee assistance, participation in a 401k program with company match, and additional voluntary or legally required benefits \#LI-NorthAmerica **About NTT DATA** NTT DATA is a $30 billion trusted global innovator of business and technology services. We serve 75% of the Fortune Global 100 and are committed to helping clients innovate, optimize, and transform for long-term success. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation, and management of applications, infrastructure, and connectivity. We are one of the leading providers of digital and AI infrastructure in the world. NTT DATA is a part of NTT Group, which invests over $3.6 billion each year in R&D to help organizations and society move confidently and sustainably into the digital future. Visit us at us.nttdata.com NTT DATA endeavors to make https://us.nttdata.com accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us at https://us.nttdata.com/en/contact-us . This contact information is for accommodation requests only and cannot be used to inquire about the status of applications. NTT DATA is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status. For our EEO Policy Statement, please click here . If you'd like more information on your EEO rights under the law, please click here . For Pay Transparency information, please click here .