Keeping critical databases available, fast and recoverable.
I'm Sayantan Chakraborty. For 11+ years I've run Oracle RAC, Data Guard, GoldenGate and EBS estates for enterprise, government and healthcare teams, with 24x7 operations and tested disaster recovery.
Protect.
Recover.
Observable systems, rehearsed recovery and calm incident response.
Deep Oracle expertise, with the whole platform in mind.
Oracle Database Administrator and Database Reliability Engineer with 11+ years of experience delivering high-availability solutions for enterprise, government and healthcare sectors, with deep experience in migration, patching and disaster recovery architecture.
Most recently I led cloud infrastructure services for Equifax production at UST, keeping GoldenGate replication within sub-second SLAs. Before that I ran Oracle and PostgreSQL platforms at IIT Delhi and Ndedge Informatics, and spent years implementing Oracle EBS for public-sector and manufacturing clients.
- Oracle 9i–19c
- Oracle RAC
- Data Guard
- RMAN
- ASM
- GoldenGate
- OEM 13c
- AWR / ASH
- Data Pump
- Oracle EBS 11i / R12
- PostgreSQL & Patroni
- Ansible
- Terraform
- Docker
- AWS
- Google Cloud
Built through real production challenges.
From Oracle EBS rollouts in 2010 to leading 24x7 database reliability for a global credit bureau.
Discuss my experience ↗Lead II, Cloud Infrastructure Services
UST (US Technology International), Bangalore- Directed Equifax production infrastructure across databases, servers and VMs.
- Resolved critical incidents across Oracle 11g/12c/19c, GoldenGate XAG and OEM 13c with sub-second replication SLAs.
- Mentored junior DBAs and coordinated vulnerability management with zero unplanned downtime.
Senior Subject-Matter Expert
Ndedge Informatics, Kolkata- Migrated production servers from Oracle Linux 7.9 to 8.2 hosting Oracle 19c.
- Quarterly CPU/PSU patching across HA environments with zero unplanned downtime.
Senior Project Scientist
Indian Institute of Technology Delhi- Containerised Linux infrastructure for 10+ research projects with 99.9% uptime.
- PostgreSQL 15/16 with etcd and Patroni; automated database builds in under 30 minutes.
Principal Consultant, Infrastructure Systems
Ndedge Informatics, Kolkata- Owned 15+ critical healthcare and manufacturing systems; led a team of 4 DBAs.
- Migrations with 35% efficiency gains; Terraform IaC on GCP and AWS.
Show earlier roles (2010 – 2023)
Project Consultant
NIEPA, DelhiOracle EBS Consultant
Wizertech Informatics, KolkataOracle Database Administrator
Magna Infotech, KolkataSoftware Engineer
Skilliantech India, KolkataDBA
Collebra Technologies, KolkataAssistant Officer
BIL Infratech, KolkataEBS Consultant
CSA Consulting, KolkataEarly roles in Oracle EBS, Linux and DBA work
Kolkata
Outcomes that hold up in production.
Client details stay confidential; the scale, the approach and the measured results are real.
- 01 / SCALE
Large-estate operations
Directed production infrastructure managing over 125 TB of data across 456 databases and 180 servers.
- 02 / PATCHING
250+ Oracle patches
Executed CPU/PSU and EBS patching across clustered environments spanning Oracle 10g to 19c.
- 03 / RECOVERY
Downtime cut by 35%
RMAN backup/recovery improvements and operational optimisation reduced downtime by 35%.
- 04 / DISASTER RECOVERY
DR objectives met
Enforced RTO under 4 hours and RPO under 1 hour across 20+ production systems.
- 05 / INCIDENT RESPONSE
Critical incidents resolved
Resolved 15+ critical production incidents involving HA configurations and database performance.
- 06 / AUTOMATION
Automated database builds
Standardised framework provisioning production-ready databases on VMs in under 30 minutes.
Organisations & engagements
A selection of employers and client engagements from my career. Names only; no endorsement implied.
- UST Employer
- Equifax Client engagement
- IIT Delhi Employer
- Ndedge Informatics Employer
- NIEPA Project engagement
What I bring to the team.
Grouped by the problems they solve rather than by tool lists.
High availability & DR
RAC, Data Guard and GoldenGate designs with tested DR drills and clear RTO/RPO targets.
- RAC
- Data Guard
- GoldenGate
- DR drills
Performance & operations
AWR/ASH analysis, SQL tuning, capacity planning and calm 24x7 incident response.
- AWR
- ASH
- SQL tuning
- OEM 13c
Automation & cloud
Infrastructure as code and repeatable builds across on-premises, AWS and Google Cloud.
- Ansible
- Terraform
- Docker
- AWS / GCP
Watch the walkthroughs.
Hands-on videos on Oracle RAC, Data Guard, RMAN recovery and day-to-day DBA work.
Subscribe on YouTube @csayantan ↗Quick answers
What does Sayantan Chakraborty specialise in?
Oracle database administration and database reliability engineering: Oracle RAC, Data Guard, GoldenGate, RMAN, Oracle EBS, performance tuning and disaster recovery, plus automation with Ansible and Terraform.
How many years of experience does he have?
More than 11 years running production Oracle databases for enterprise, government and healthcare organisations, including estates of 125 TB, 456 databases and 180 servers.
Where is he based?
Bangalore, India. He works with teams remotely as well.
How can I get his resume?
Use "Verify email to get resume" on this site. A one-time code is emailed to you, and the PDF downloads once the code is verified.
Where can I watch his videos?
On YouTube at @csayantan, where he publishes Oracle DBA and database reliability walkthroughs.
Let's talk about the work ahead.
Have a role, a migration or a reliability problem in mind? Send a note with the context that matters.