Hemant is available for hire
Hire HemantHemant Sajnani
Verified Expert in Engineering
Software Developer
New Delhi, Delhi, India
Toptal member since November 27, 2019
Bio
Hemant is a back-end developer with expertise in database management systems including SQL Server, Oracle, MySQL, and others. He has over 17 years of experience in database design, writing complex queries, optimization, performance monitoring, tuning, high availability, and disaster recovery.
Portfolio
Associated Broadcasting Company Private Limited
AWS Certified SysOps Administrator, AWS Certified Solution Architect...
NDTV
Oracle, Microsoft SQL Server, Python, APIs, AWS Certified Solution Architect...
Aurea Software
Microsoft SQL Server, Oracle, SQL, Data Engineering, ETL, PL/SQL...
Experience
- SQL - 20 years
- SQL Server DBA - 15 years
- Oracle DBA - 15 years
- Performance Tuning - 12 years
- SQL Performance - 10 years
- AWS Certified Solution Architect - 5 years
- MySQL - 4 years
- Oracle Cloud - 2 years
Work Experience
Chief Technology Officer
2020 - PRESENT
Associated Broadcasting Company Private Limited
- Transformed the digital presence of TV9 digital business by introducing modern architecture, which led to the TV9 digital business growing by 200% on Comscore in six months and crossing 100 million unique visitors per month in June 2021.
- Implemented new ways to connect TV audiences to digital platforms, including introducing a second screen like a mobile phone for TV viewers.
- Led a digital innovation team that connected Indian election data in real-time on digital platforms. Created a robust serverless back end in Python and Node.js to stream real-time data to over a million concurrent users.
- Created different data-driven dashboards to capture various analytics, including Google and YouTube; also helped with SQL development for COVID-19 reports.
Technologies: AWS Certified SysOps Administrator, AWS Certified Solution Architect, Oracle Cloud, XML, Amazon RDS, Amazon Web Services (AWS), Analytics, Data Strategy
Senior Vice President
2004 - 2020
NDTV
- Handled Oracle RAC and SQL clusters for broadcast data management and iNews (a newsroom center) archiving. Provided various automated tools to ease out daily activities that require manual attention.
- Headed election programming and Indian and foreign stock market data.
- Modified existing databases to meet unique needs; these databases handled around 2,000 transactions per second.
- Served as the technology lead for EPG (electronic programming guide) business vertical for NDTV. There are now over 100 clients on board.
Technologies: Oracle, Microsoft SQL Server, Python, APIs, AWS Certified Solution Architect, AWS Certified SysOps Administrator, MySQL, Amazon RDS, Data Strategy, Database Backups, SQL Server DBA, Oracle DBA, Performance Tuning
SaaS Ops Architect
2015 - 2016
Aurea Software
- Supported Oracle and SQL Server databases for the ISTA international/Aurea energy solutions project.
- Migrated on-premise databases of Oracle and SQL Server to AWS Cloud.
- Oversaw database performance, replicated issues for troubleshooting, and automated tasks.
Technologies: Microsoft SQL Server, Oracle, SQL, Data Engineering, ETL, PL/SQL, SQL Performance, Performance Tuning, Database Replication, SQL DDL
Database Manager
2012 - 2014
Triology
- Started as a database administrator and promoted to the database manager and lead a team of DBAs from all over the world.
- Upgraded and migrated the stack (OS, JVM, app server, and DBMS) that runs business applications using AWS.
- Interviewed, hired, and managed global DBAs. This included weekly meetings, assigning tasks, and reviewing completed tasks.
Technologies: MySQL, PostgreSQL, Sybase, Microsoft SQL Server, Oracle, Data Engineering, Data Architecture, ETL, Oracle PL/SQL, Python 2, Performance Tuning, Database Replication, SQL DDL
Project History
Elections In India
To power broadcast graphics for elections, I was mainly responsible for capturing data from data providers like AC Nielsen and crunching the data in database structure designed to suit the development needs. Our company has had the best election coverage for many years because of fast and accurate information.
Stock Market Data
I worked to capture data for Indian and foreign stock markets including Forex from Reuters, Bloomberg, and Cogensis data providers. I led the back-end development of Oracle database. I also configured a 2-node real application Ccuster to ensure high database availability.
EPG Provider
The only company in India to provide an electronic programming guide for more than 1,000 TV channels in India. Led the back-end development team to write Python APIs to get data from SQL RDS instance and power Elasticsearch Index to distribute it to clients. Created an Android app as well called UREQA.
Education
2001 - 2003
A Level (Advanced Diploma Equivalent) in Computer Science
Department of Electronics and Accreditation of Computer Classes, New Delhi - New Delhi, India
1998 - 2000
Bachelor of Science Degree in Science
Maharshi Dayanand Sarswati University - Rajasthan, India
Certifications
OCTOBER 2025 - PRESENT
ClickHouse Database Associate
ClickHouse
JULY 2020 - JULY 2023
AWS Certified Solutions Architect - Associate
Amazon Web Services (AWS)
JUNE 2020 - JUNE 2023
AWS Certified SysOps Administrator Associate
Amazon Web Services (AWS)
JULY 2019 - PRESENT
Python for Applied Data Science
Coursera
JULY 2019 - PRESENT
Databases and SQL for Data Science
Coursera
JUNE 2005 - PRESENT
Microsoft Certified Professional — SQL Server
Microsoft
Skills
Tools
Microsoft Access
Languages
SQL, Transact-SQL (T-SQL), Python, Python 2, SQL DDL, XML
Storage
SQL Server DBA, Oracle DBA, Oracle PL/SQL, SQL Performance, MySQL, Oracle Cloud, Database Backups, Microsoft SQL Server, Sybase, PostgreSQL, Database Replication, PL/SQL, ClickHouse
Paradigms
ETL
Platforms
Oracle, Amazon Web Services (AWS)
Other
Performance Tuning, AWS Certified Solution Architect, Data-driven Dashboards, Solution Architecture, Data Strategy, AWS Certified SysOps Administrator, APIs, Amazon RDS, Analytics, Back-end, Data Engineering, Data Architecture, Biology, Chemistry
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