Managing reliability and database performance using:- SQL- Terraform- Ansible- Grafana + Prometheus

Enabling companies to harness the full capabilities of PostgreSQL, from initial architecture design and clusters upgrade to successful migration from other RDBMS. Also provide comprehensive support and guidance, ensuring that each organization is able to fully leverage the power of PostgreSQL for their specific business needs.

(Staff) Database Reliability Engineer.Joined Adyen officially as PostgreSQL Expert, and working with less than a handful people to handle data and traffic I never have imagined in my life. Wonderful teammates and working environment made me feel welcomed and challenged. Keeping these giant database clusters up and running and also stable, while planning for handling future challenges.After several years of dedicated work as a database administrator, I transitioned to the role of Database Reliability Engineer, focusing on designing and implementing comprehensive database ecosystems that maximize performance, reliability, and security. I have encountered unique and challenging cases that have required me to think creatively and outside the box, often resulting in innovative and effective solutions that have not been seen before. Continuing to seek out new opportunities to expand my knowledge and expertise in the field, and am committed to pushing the boundaries of what is possible in database systems.Particularly focus on Postgres, with extensive experience in optimizing, scaling, and securing the database system. While occasionally encountered frustration with other RDBMS that can be restrictive in their approach, committed to finding solutions to any issues arise is my motto. Also highly experienced in systems observability and enjoy expanding knowledge in systems engineering.Projects:- led the initiation, planning, and design of a Postgres upgrade to version 13- setting up a comprehensive logging pipeline and monitoring system for all Postgres clusters- configured alerting mechanisms for all Postgres clusters- extensive experience in managing Purestorage FlashArray- performance improvements for network storage for Postgres clusters- managing CockroachDB database clusters- design and planning database recovery solutions

- Join forces with DBA administrator members to monitor and ensure high availability of development, staging, and production database and quickly respond and diagnose problems- Working with development team to review production and business user databases to ensure data integrity and speed across databases- Ensure timely user provisioning and security setup for all database clusters- Schedules and monitors resources supporting both day-to-day operations and project activities including action items- Planning monthly projects in sync with development team and the deliverables- Partner with Business Analysts, Database Administrators, and developers to build out datamart to support changing business needs- Participation in design, development, testing and implementation of new projects or sustaining current applications- Act as the liaison between database administrator and development, network, system administrator, data analyst, and site reliability engineer team- Administer a variety of database systems mainly PostgreSQL as well as MySQL, redis and ElasticSearch

Working with small team to handle all databases of Tokopedia using PostgreSQL, MongoDB and MySQL. The databases use replication and cluster mode to comply with automatic failover.The tasks include: (1) installation and configuration; (2) Performance and tuning; (3) cluster management and administration; (4) Upgrade; and (5) TroubleshootingTechnology stack: PostgreSQL, MySQL, MongoDB, redis, Ansible, AWS, Aliyun Cloud, Prometheus, Grafana, Golang, Perl, Linux.

Delivering Oracle DBA services for Emerio's customer in banking industry. Scope of works include installation, upgrade, monitoring, maintenance, and tuning.The database software is Oracle and the application server is Oracle Weblogic / Application Server from 9i to 12c running on Windows Server as well as HP-UX, Solaris and IBM AIX.Current projects are at two companies with RAC and DataGuard enabled.

Delivering maintenance and implementation support for Oracle projects on various field customer including installation, upgrade, migration, patching, performance tuning, preventive maintenance, troubleshooting, escalating problem to Oracle, upgrade, and update knowledge session.Handling customer from various business field such as banking, telecommunication, customer goods, media, etc. Responsible for preventive and corrective maintenance for Oracle 8i-11g across OS platform (Linux, Solaris, AIX, HP-UX, Tru-64, and Windows Server)Projects covering Oracle Real Application Clusters (RAC), Data Guard, and GoldenGate.

Deliver maintenance and implementation support for Oracle projects on customers including installation, upgrade, migration, patching, performance tuning, preventive maintenance, troubleshooting, escalating problem to Oracle, upgrade, and update knowledge session.Handling various customers specialized in banking industries. Responsible for Oracle 8i-10g maintenance across OS platform (Linux, Solaris, HP-UX, Windows Server)

+ Server installation and maintenance;+ Working on CentOS (Linux) and Windows Server 2003 environments;+ End-users support both for Linux and Windows environments;+ Application system (ERP) deployment and maintenance;+ Oracle 10g database deployment and administration;+ Oracle performance tuning, backup and restore

Work as professor assistant of programming classes at computer laboratory of my campus. Classes are Java Programming, Visual Basic Programming, HTML, PHP, MySQL and design.