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I am a Microsoft Certified Senior Database Administrator with 13+ years of hands-on experience designing, deploying, and optimizing Microsoft SQL Server (2008–2022, all editions) in mission-critical enterprise environments. I specialize in: - End-to-end SQL Server architecture & environment setup - High availability & disaster recovery solutions (Always On Availability Groups, Failover Clustering, Replication) - Advanced database performance tuning for high-volume and high-concurrency systems - Large-scale data platforms handling millions to billions of rows - Production troubleshooting, capacity planning, and optimization I have delivered reliable, high-performance database solutions across banking, financial services, and enterprise IT, working in senior and advisory roles where uptime, data integrity, and performance are non-negotiable. My approach is practical, performance-driven, and business-focused — ensuring databases are not only stable, but optimized for growth, scalability, and long-term success.

I have 17+ years of IT experience in the area Application Development, Systems Integration, Production Support, Application Maintenance and QA projects. I have played the role of Project Manager, Project Lead, Business Analyst, Developer and QA. I have managed complete SDLC for medium sized development projects. I have business domain knowledge in the area of Automotive on-board telematics and IT systems, Pharma Relationship Marketing, Manufacturing Execution Systems and Work and Asset Management. I have actively implemented LEAN practices in Production support projects. My technical skills in Database consultancy/administration/development are as follows 1. Design and development of relational and NoSQL databases (Mysql, Oracle, MongoDB). Production support of Mysql and MongoDB databases. 2. Migrating existing databases to Mysql, Oracle and MongoDB. 3. Configuring monitoring and alerts for database servers. 4. Develop business layer applications in PL/SQL / Mysql procedures and UNIX. 5. Setup and support Mysql HA database cluster in single primary or multi primary mode without changes to your data or tables. 6. Setup and support Mysql master-slave replication for backups and failover. 7. Automated Point-in-time recovery of Mysql databases. 8. Performance tune databases like Mysql and Oracle. My programming language skills include 1. PHP 2. C 3. PL/SQL 4. Mysql stored procedures 5. UNIX Shell scripting My technical skills in REST API/Web Services consultancy/development are as follows 1. Creating high performance, scabale, standards compliant and secure RESTful API for backend and business logic processing as microservices or in monolithic service architecture. My technical skills in System/Devops consultancy/administration are as follows 1. Create solution architecture for Cloud and On-Premise infrastructure based on free and open source software stack. 2. Containerize Mysql and other servers using Docker and/or LXC. 3. Deploying LXC containers to create extremely lightweight and tightly packed virtualized environments to isolate, secure and streamline your IT operations. Running LXC containers have near zero performance penalty. 4. Install and configure QEMU-KVM virtual machines with full inter VM and external networking support, 3D graphics acceleration for GUI based administration. 5. Performance tune and secure your LAMP/LEMP and other application stack. 6. Deploying directory servers like OpenLDAP, designing DIT, configuring LDAP access control, indexing, replication and single sign-on. 7. Setup in-memory databases like Memcached or a persistent in-memory database Mysql Memcached plugin for caching or sessions. 8. Setup and maintain secure Email servers using Postfix, Dovecot, Courier IMAP, maildrop, Spamassasin, ClamAV, milters, DKIM, SPF, DMARC and Roundcube webmail. 9. Maintenance and administration of Linux servers like setting up firewall, webservers, mail servers, ldap servers, imap servers, automating system admin tasks using shell scripts, applying security updates, install and uninstall of software packages. 10. Setup of Jenkins for CI/CD of complex project workflows. 11. VPN setup ( IKE/IPSec and OpenVPN )

I am MongoDB SI certified DBA and Developer with 100% job success ratio. I have 10+ years of experience including MongoDB Atlas, Query optimisation, Index, Schema, MongoDB Cluster, DB Version Update, Sharding, replication, security, backup restore and query design.

SQL Server & Database Expert | 25+ Years of IT Experience Data Modeling | Design & Development | Data Analytics | Performance Tuning | Data Visualization With over 25 years of extensive IT experience, I specialize in SQL Server environments (from SQL Server 2005 to 2019). I deliver high-quality, scalable database solutions that ensure optimal performance, data integrity, and seamless integration. My expertise spans design, modeling, development, implementation, and support of SQL Server systems, with a focus on performance and efficiency. Key Skills & Expertise: T-SQL Proficiency: Creating complex triggers, tables, stored procedures, functions, and views to ensure seamless data management and integrity. Database Management: Extensive experience with normalization and RDBMS, optimizing structure and performance. SQL Server Services: Hands-on with SSIS, SSAS, and SSRS for integration, analysis, and reporting. Performance Tuning: Optimizing performance and query tuning for efficient database operation under heavy load. Data Modeling: Specializing in logical and physical modeling, using tools like Erwin for effective database design. Data Warehousing & ETL: Expertise in data warehouse design, SSIS, Azure Data Factory, and building star schema dimensional models. Business Intelligence & Reporting: Skilled in SSRS and Power BI for interactive dashboards, reports, and visualizations that turn data into actionable insights. Optimization Tools: Familiar with Index Tuning Wizard, SQL Profiler, and Performance Monitor to resolve bottlenecks. Database Administration: Proficient in MySQL and PostgreSQL database development, configuration, troubleshooting, and administration. Additional Expertise: DBA Tasks: Server maintenance, fail-over clustering, replication, backup/restoration, job scheduling, and error handling. Performance Monitoring Tools: SQL Sentry One, Grafana, and Spotlight for SQL Server. Collaboration & Teamwork: Strong in cross-functional collaboration to meet business objectives. Adaptability & Multitasking: Ability to handle multiple projects while adapting to new technologies and client needs. Quick Learner: Fast to pick up new technologies and deliver impactful solutions. Let’s Build Scalable & High-Performing Solutions Together! If you're looking for a results-driven database expert to optimize your SQL Server environment, design robust data models, or create effective BI reports, let’s connect. I'm passionate about helping clients achieve their goals through high-performance database solutions.

Database Development : ****************************************** Oracle Sql, Plsql, Data Export from Oracle DB to excel MSSQL PostgreSQL AWS Redshift, Glue, S3 GCP BigQuery Snowflake Oracle Forms(D2k) Expertise in Entities like : ------------------------------- Tables, Views, Sql Queries, All Types of JOINS, Cursor, Procedure, Function, Packages, Triggers, Collection, Bulk Collect, Analytical/Window Function, Dynamic Sqls, Pipelined Functions, Sql Loader, External Table, Hints, Bug Fixing , Debugging, Impact Analysis etc. DBA ************** * Having 10+years of experience as an Oracle, MICROSOFT SQL server and Golden Gate administrations in Banking, finance, Healthcare, Multimedia and currently working in Telecom domain. Working in 24x7 environments and providing support. * 6 +Month experience on AWS RDS and EC2 instances. Experience in RAC Implementation, maintenance of Clustered Databases, CRS upgrade, ASM implementation and maintenance. * Hands on knowledge of Golden gate replication and online Migrations tool. * Migration from 11g and 2c to 19c using DBUA Experience in installation & configuration oracle 10g, 11g, 12c and 19c RAC. * Implementation MICROSOFT SQL server 2008, 2012, 2014 and 2016 in development, test, and production environment. Always on replication. * Monitoring MSSLQL Server clustering, Log shipping, mirroring * Having dept knowledge about Oracle and MICROSOFT SQL server patching. * Tested and Implemented different physical and logical backup and recovery methods like point in time, Media recovery, RMAN and EXPDP and IMPDP utility. * Experience in designing Data guard solution and implementation and in managing physical standby. * Experience in monitoring and optimizing the Database performances through tuning using stats pack, AWR, ADDM, explain plan, Backup timings of databases. Having hands-on knowledge Oracle Table Partitions and Materialized Views. * Upgraded/ Migrated MICROSOFT SQL server Instances/Databases from older version MICROSOFT SQL server to new version of SQL Server. Apply SP (Service Pack)/ hot fixes on MSSQL server Instances to address security and upgraded related issues. * Performance Tuning and schedule jobs to automate different database related activities including backup, monitoring database health, disk space, and backup verification. * Extensive knowledge of oracle architecture SGA, PGA, Listener, tns names. * Developed Different Maintenance Plans for database monitoring. Setup Jobs, Maintenance plans for backups. Rebuilding indexes, check server health, alert, notifications Manual, on demand and setup jobs for Database Backup, and design backup strategy. * Experience in Mirroring and Log shipping and managing Standby Databases. * Creating File groups & managing File groups. Creating users and providing proper privileges for Database access. * Memory monitoring and optimizing the Database Performances through Tuning Explain Plan. Experience in Oracle RMAN backup (Full, incremental and cumulative) and recovery, Incomplete recovery and disaster recovery. * Experience in, Maintenance plans for backups, Rebuilding indexes, check server health, alert, notifications Manual, on Demand and setup jobs for Database Backup, and design backup strategy. * Hands-on experience in configuring MSSQL server and Windows system event log entries for warnings. Language : ********************* Python (Pandas, Numpy, Matplotlib, AI/ML, PySpark) Java (Java, Spring MVC, Spring boot, Microservices, Rest-api, React, Angular old version Javascript) ETL: Informatica,ODI **************** 1. Proficient in data integration and ETL processes using Informatica PowerCenter. 2. Extensive experience in designing, developing, and implementing ETL solutions with a focus on Informatica PowerCenter. 3. Demonstrated expertise in creating complex mappings, workflows, and transformations in Informatica PowerCenter to optimize data flow. 4.Proven track record of troubleshooting Informatica PowerCenter workflows. 5. In-depth knowledge of working with various databases and sources like oracle , terafata, flat files to extract, transform, and load data using Informatica PowerCenter. 6. Implemented and maintained data warehouses utilizing Informatica PowerCenter as a key component of the ETL architecture. 7. Proficient in utilizing Informatica PowerCenter for handling large volumes of data. Excel : ************* Advanced Excel Formula, Macro Data Visualization : ************************** Power BI, As a Trainer to Train in SQL Help Students in their SQL Assignments ####################################### Having over 14 Years of experience mainly as a Database Development Expert. Also having hands on experience in above mentioned skill set. Just give a faith for your development activities, I assure you will not be disappointed. Note : Pay after only the satisfaction of work only. Thanks DK Raju

🏆 TOP RATED UPWORK PROFESSIONAL | 16+ YEARS IN DATA & ANALYTICS Need help with Snowflake migration, data engineering, data architecture, SQL optimization, or Databricks? I help businesses build, modernize, migrate, and optimize scalable data platforms using Snowflake, Databricks, SQL, Python, and cloud technologies. I bring 16+ years of experience across data architecture, data engineering, database modernization, data warehousing, business intelligence, and cloud data platforms. 🚀 WHAT I CAN HELP YOU WITH • Snowflake architecture, development, migration, and optimization • SQL Server to Snowflake database migration • Data engineering and ETL/ELT pipeline development • Databricks and Apache Spark solutions • Data warehouse and lakehouse architecture • Data modeling and database design • SQL development and performance optimization • Data integration and data quality • Database modernization and cloud migration • Python-based data engineering and automation • Azure data solutions • Power BI and analytics data platforms 📊 PROVEN EXPERIENCE • Migrated 29+ databases from SQL-based platforms to Snowflake, covering migration planning, architecture, data validation, performance optimization, and production deployment. • Worked with data environments exceeding 15 TB and designed scalable data platforms, pipelines, warehouses, and integration solutions. • Led teams of 18+ engineers across data engineering, database modernization, migration, and analytics initiatives. • Supported 25+ critical projects running in production for enterprise clients. 🗄️ DEEP SQL & DATABASE EXPERIENCE I also bring 12+ years of hands-on SQL Server experience across database development, administration, performance tuning, migration, high availability, backup and recovery, replication, clustering, SSIS, SSRS, T-SQL, and database troubleshooting. This combination of deep database experience and modern cloud data expertise allows me to understand both your existing environment and the target architecture before recommending a solution. ☁️ TECHNOLOGIES Snowflake | Databricks | Apache Spark | SQL | SQL Server | PostgreSQL | Python | Azure | Power BI | ETL/ELT | Data Warehousing | Data Modeling | Hadoop | Hive | MongoDB 🤖 AI & MODERN DATA I also have experience with Python, R, machine learning, NLP, pandas, NumPy, Matplotlib, scikit-learn, Hadoop, Hive, Spark, MongoDB, and modern AI/data concepts. 🎯 WHY WORK WITH ME? I focus on solving the actual business problem—not simply writing code. My approach is straightforward: 1. Understand your current environment and requirements 2. Design the right technical approach 3. Build or migrate the solution 4. Validate data quality and performance 5. Deliver a reliable, scalable, production-ready platform I value clear communication, ownership, quality delivery, and long-term client relationships. If you need a Snowflake Data Architect, Data Engineer, Databricks specialist, SQL expert, or database migration professional, let's discuss your project.