Open to opportunities

ArunKumar Kumaresan

@arunkumarkumaresan

Message

MS SQL Developer improving fintech databases with T-SQL, ETL optimization, and performance tuning.

India

Message

What I'm looking for

I’m looking for an opportunity to build and optimize SQL Server/ETL pipelines, improve performance using execution plans and indexing, and grow into cloud data engineering with AWS while delivering reliable, high-impact data workflows.

I’m an MS SQL Developer with 2.6 years of fintech experience, focused on T-SQL development, query optimization, stored procedure design, and SSIS-based ETL pipelines. At Razorpay, I improved database performance—delivering a 30% reduction in execution times and 25% faster data retrieval for high-frequency, large-scale workloads.

I specialize in execution plan analysis, index design, and database performance tuning on SQL Server 2019/2022, using CTEs, subqueries, and JOIN refactoring to boost readability, maintainability, and runtime performance. I also design and deploy end-to-end SSIS ETL packages across SQL Server, flat files, Excel, and REST API sources, and I’m currently pursuing AWS Data Engineering training with hands-on exposure to S3, Glue, and Redshift.

Experience

Work history, roles, and key accomplishments

Current

MS SQL Developer

Current

Mindeed Technologies and Services Pvt Ltd

Jul 2024 - Present (1 year 11 months)

Designed and optimized T-SQL stored procedures and indexed high-frequency tables for Razorpay, improving data retrieval speed by 25% and reducing execution times by 30% for critical ETL and reporting workloads. Built and deployed end-to-end SSIS ETL packages, and used execution plan analysis and statistics tuning to improve performance and stability across 10+ mission-critical reports.

T SQL Stored Procedures SQL Server Index Design Query Optimization Execution Plan Analysis Statistics

Business Associate

Altruist Technologies Pvt Ltd

Nov 2023 - Apr 2024 (5 months)

Managed and maintained structured Excel data repositories to support administrative and operational reporting. Used PivotTables, VLOOKUP/XLOOKUP, and conditional formatting to analyze survey and customer data and produce decision-support reports for management.

Advanced Excel XLOOKUP Conditional Formatting Power Query Data Modeling

Education

Degrees, certifications, and relevant coursework

Bishop Heber College

Master of Science, Bioinformatics

2018 - 2023

Completed an integrated 5-year Master of Science program in Bioinformatics, with SQL and data analysis as core curriculum topics including database management systems, biostatistics, and large-scale data processing.