Hire the Best Relational Databases Specialists in Chennai, IN

I am a Senior SQL Developer with 13+ years of experience working with enterprise databases including SQL Server, Oracle, and MySQL. I specialize in database performance optimization, query tuning, stored procedure development, ETL pipelines, and data migration. I have worked on large-scale enterprise systems handling high-volume data and mission-critical applications. My expertise includes identifying slow queries, optimizing execution plans, implementing indexing strategies, and designing efficient database structures. Services I provide: • SQL query optimization and performance tuning • Stored procedure and PL/SQL development • Database troubleshooting and debugging • ETL pipeline development and data integration • Data migration and transformation • Database schema design and optimization I focus on delivering reliable, scalable, and high-performance database solutions that improve system efficiency and reduce processing time. If you are facing slow queries, database issues, or need help with data migration, I would be happy to help.

I am a Senior Database Administrator & Database Architect with 10+ years of hands-on experience in RDBMS and Graph Databases, specializing in large-scale database migration, cloud modernization, and performance optimization for mission-critical systems. I have successfully delivered end-to-end database migrations and modernization programs across FinTech, Logistics, Healthcare, and Enterprise platforms, supporting clients in Singapore, UK, UAE, and South America. My work focuses on building highly available, scalable, and performance-optimized database environments on AWS and Azure. What I Do Best • End-to-end database migration and modernization with zero or minimal downtime • Performance tuning and query optimization for large, high-volume databases • Cloud-native database architecture and HA/DR implementation • Graph database modeling and optimization using AWS Neptune • Automation-driven DBA operations to reduce risk and manual effort Key Services I Offer Database Migration & Modernization • SQL Server → PostgreSQL / MySQL / Aurora • Oracle → PostgreSQL • SQL Server → AWS Neptune (Graph Database) • IBM DB2 → Aurora PostgreSQL • On-premises → AWS / Azure cloud migrations • Checksum-validated, low-downtime migration strategies Database Performance Optimization • Query rewrite and execution plan optimization • Index strategy design and tuning • Bottleneck identification for large datasets • Achieved 5x–20x performance improvements on critical workloads Cloud Database Engineering (AWS & Azure) • Amazon RDS, Aurora, EC2-hosted databases • AWS DMS migration pipelines • High Availability, Multi-AZ, failover & DR design • Monitoring and optimization using CloudWatch and Performance Insights Graph Database Engineering • AWS Neptune setup, tuning, and scaling • Gremlin and Cypher query optimization • Graph data modeling for complex relationships • SQL-to-Graph data transformation and integration Scripting & Automation • Python automation for ETL, migration, validation, and reporting • PowerShell and Bash scripting for DBA operations • Environment refresh automation for Dev / QA / UAT / Prod Reporting & ETL • SSIS, SSRS, Azure Data Tools (ADT) • Data warehouse design and transformation pipelines Technical Expertise • Databases: SQL Server, MySQL, PostgreSQL, Oracle, MongoDB, AWS Neptune, IBM DB2 • Query Languages: T-SQL, PgSQL, PL/SQL, Gremlin, Cypher • Cloud: AWS (RDS, Aurora, EC2, DMS, Redshift, VPC, KMS), Azure (IaaS / PaaS) • Scripting: Python, PowerShell, Bash • Tools: SSIS, SSRS, CloudWatch, SQL Profiler, Query Store, Performance Monitor Why Clients Choose Me • Proven experience with complex, high-risk migrations • Strong focus on data integrity, performance, and reliability • Clear communication and ownership from planning to delivery • Solutions built for long-term stability and scalability If you need a reliable DBA, migration specialist, or performance expert who can take full ownership and deliver results with precision, I’m ready to help.

Extensive experience (16 years) in Oracle, MySQL, SQL Server, Postgres, Snowflake and Azure Data Lake methodically identifying and resolving complex underlying causes of problems, using a vast variety of techniques and tools. I have solved numerous show-stopping Performance problems, as well as often re-engineered immensely complex designs and code, providing significantly improved performance. Have designed data warehouse and implemented ETL pipeline strategies on AWS and Azure. Extensive experience as a Data Engineer with multiple work experience in data extraction, data transformation, data load, data protection, data cleansing, data migration, data mergers etc. Expert level ability with Data Architecture, Data Modelling and Data Analysis. I can conceptualize, design and develop long-term, automated, integrated solutions with a focus on increasing your competitive advantage. Have also held roles where I had to work with business end users to provide Solution Architecture and drive the solution from discussing with the users to delivering the final solution product to the end users. Have around 6 years of experience in Python (ETL and Data Analytics), 4 years in Tableau, 2.5 years in DBT and 2 years in Matillion (ETL). Domain expertise: Freights and Logistics (Quotation, Pricing, Booking, Reservation, Inventory management, Operations, Control products for Accenture Freights and Logistics Solutions) - 7 years Finance - Capital Market (Backend book-keeping for different instruments for BNP Paribas) - 3. years Digital Marketing (Generic product for Call Center and Website for a Digital Marketing company called Candid Maven) - 2 years Merchant Data Platform (Creating the automated framework from scratch to bring in data that was managed in Smartsheet to the centralized database using Python and PL/SQL to serve the analytic needs - for a company called Woflow that holds 96% of the market in this domain) - 6 months Pharmaceutical (Data Lake and Data Warehouse setup for Precision for Medicine - integrated systems like CRM (Saalesforce), ERP (Infor CloudSuite, PSA), HR (Greenhouse, ADP, PSA, SAP Success Factor), RM (Smartsheet, WorkFront), Clinical vendor data (Citeline, KMR) - 3 years At Precision for Medicine, I have worked on integrating the data of all the above mentioned disparate data platforms in 1 single dimension model (ERP, HR, RM, CRM) for creating the centralized enterprise analytics platform. I am eager to work with you, to provide reliable, consistent, and High-Level solutions to design/development challenges. Please contact me, so we can discuss how we can work together to FULLY meet your Business Needs!

✅ ♛ TOP-RATED 20+ years of database engineering experience, one goal: turning slow, fragile, or outdated databases into fast, secure, and scalable ones. I specialize in SQL programming, performance optimization, data migration, and automation, with a focus on tuning, modernization, and seamless data flow. RoHSen IT Services & Support — a team of IT and HR professionals who've worked together for over 10 years, bringing that same trust and consistency to every client. We deliver reliable, high-quality, and cost-effective consulting services, tailored to businesses of all sizes. Our Services * Application Development – Web, Mobile & Desktop (.NET, C#, ASP.NET, Web AP, PythonI) * Database & Data Engineering – SQL Development, DBA, ETL, Data Migration * Cloud Solutions – Azure, AWS, Databricks, PySpark, Snowflake * Business Intelligence – Power BI, Dashboards, Reporting & Data Visualization * AI Solutions & Automation – AI-assisted development, AI integration, chatbots, workflow automation, prompt engineering, and intelligent business solutions * HR Consulting – Recruitment, HR Business Partner To make our services accessible to startups, SMEs, and growing businesses, we offer competitive and flexible pricing without compromising on quality. . 💾 Database & SQL Expertise • Expert in MS SQL Server, PostgreSQL, MySQL, SQLite, SQL Azure, MongoDB, etc... • T-SQL Programming – Stored Procedures, Functions, Views, and Complex Queries • Query Optimization & Performance Tuning • ETL / SSIS / Data Migration • Database Architecture, Maintenance Plans, Backup & Recovery • Power BI, Crystal Reports, Data Analytics & Automation (VBA, Excel, C#) I also work with large structured datasets — contact databases, real estate listings, and investor directories — using cleansing, deduplication, and fuzzy matching to turn raw data into usable, structured output. ⚙️ Automation & Data Mining • SmartSheets ↔ SQL Integration • XML/JSON ↔ SQL Data Pipelines • Web Scraping • Fuzzy Matching • Excel/VBA Automation for Data Cleansing & Reporting • Data Mining & Preparation – Extracting, deduping, and cleaning large datasets for analytics and migration

Former Canadian corporate Data Analyst turned independent professional, I specialize in eliminating manual work by building automated reports, dashboards, and spreadsheet systems. With four years of in-house experience, my focus is on designing resilient data models that fix broken architecture, ensuring your reporting never breaks, even when your source files change. Based in India and available for 3–4 hours of overlap with US and Canadian business hours. I keep communication clear and timely, and work smoothly across time zones. Most of my work starts the same way. Someone is spending six hours a month rebuilding the same report by hand, and the numbers still don't tie out. I find where the data actually lives and model it properly, so the report refreshes on its own. Once the model is right, you can finally answer: why revenue moved, where customers drop off, and which channels actually pay back. What I do: · Power BI: Semantic models, DAX measures, and refresh-safe dashboards. · SQL: Pulling and shaping data straight from the database (no messy Excel exports). · Excel & Sheets: Automation via Visual Basic for Applications (VBA), Power Query, Power Pivot, Advanced Formulas, and templates non-analysts can maintain. · Power Automate: Cloud flows that connect apps and auto-refresh datasets. · Python: Cleaning and parsing massive datasets too heavy for spreadsheets. Background: Data Analyst at The Weather Network & NorthLake Financial. I live and breathe month-end cycles, and I know why "just add a column" is never just adding a column. Two ways I usually get pulled in: Either there's a report someone rebuilds every month, or there's a number nobody can explain. Send me the file or describe the problem, and I'll tell you which one you're dealing with. Invite me - I'm ready to start.

I am a software engineer with 26+ experience (18 years in corporate world and rest as freelancer). A data analytics, warehousing and BI specialist - as a freelancer, I have been building super efficient, cost effective and light weight solutions using data modeling, ETL, power bi, vba scripting (excel/word/powerpoint), sharepoint power apps, power query and SQL. I have been leveraging my knowledge in various technologies, process, problem redressal, transparent communication etc. to deliver solutions/implementations for customers. I have played roles of business analyst, architect, technocrat, project manager and a business user which helps me in gaining a 360 degree view of a problem. My technical skills helps me arrive at a problem that is viable and meaningful. Prior to freelancing i have worked for large companies like Texas Instruments, Microsoft, Apple, Intel, Boeing, Syngenta in technical and managerial capacities. Technically I have worked in Java, dotnet and PHP technologies with Oracle/MSSQL/MYSql as backend. I am very strong in the all web technologies as well as databases. I would be able to perform solution architecture, design and implementation. I Hold 2 patents in USA. I am very passionate about using my analytical and technical ability to comprehend the problem and design a solution that is accurate, easy to use, scalable and highly maintainable. There are many that do just what is told to you, but i like to own up the problem on my customer's behalf and define and implement a solution. I am very well versed with remote execution model having executed over 250 projects in technical and leadership roles from USA as well as from India.