Senior Database Engineer | Scalable Database SystemsJohnny Ha
I design, build, and optimize scalable, production-grade database and data engineering systems that power modern applications. With senior-level experience across startups and enterprise environments, I help teams turn data into a reliable, high-performance foundation for growth.
This service focuses on database architecture, data pipelines, performance optimization, and reliability, ensuring your systems are secure, maintainable, and built to scale. Whether you’re launching a new product, scaling a SaaS platform, or modernizing legacy infrastructure, I deliver database solutions designed for real-world production workloads.
What's included
Scalable Database Architecture & System Design
Design of a robust, scalable database architecture tailored to your application’s workload and growth requirements. This deliverable focuses on reliability, performance, and long-term maintainability.
Includes:
Database technology selection (PostgreSQL, MySQL, NoSQL, etc.)
Schema and data model design
Read/write scaling strategies
Indexing and partitioning strategy
High-availability and replication planning
Production-Ready Database Development & Implementation
Implementation of a secure, optimized, and production-ready database system integrated with your application or platform.
Includes:
Database schema creation and migrations
Query optimization and performance tuning
API-ready data access patterns
Secure role-based access control
Transaction and consistency management
Data Engineering & ETL/ELT Pipelines
Design and development of automated data pipelines to ingest, transform, and store data reliably at scale.
Includes:
ETL/ELT pipeline design and implementation
Data validation and transformation logic
Scheduling and orchestration
Monitoring, logging, and error handling
Integration with analytics and reporting tools
Database Performance Optimization & Scaling
Audit and optimization of existing database systems to improve speed, reliability, and scalability under real production load.
Includes:
Query profiling and bottleneck analysis
Indexing and caching strategies
Schema refactoring
Load testing and capacity planning
Performance benchmarking and reporting
Data Migration & Modernization
Safe and efficient migration of databases from legacy systems to modern, scalable infrastructure with minimal downtime.
Includes:
Migration planning and risk assessment
Data integrity validation
Zero or low-downtime migration execution
Post-migration performance tuning
Documentation and rollback strategy
Analytics-Ready Data Models & Warehousing
Design of analytics-friendly data models and warehouse structures to support business intelligence and reporting.
Includes:
Dimensional modeling (star / snowflake schemas)
OLAP-ready datasets
Data aggregation and optimization
Integration with BI tools
Performance tuning for analytical queries
Database Security, Backups & Reliability
Implementation of database security and reliability best practices to protect critical business data.
Includes:
Access control and permission management
Encryption at rest and in transit
Automated backups and restore testing
Disaster recovery planning
Monitoring and alerting setup
Starting at$60 /hr
Service provided by
Johnny Ha proAlhambra, USA
- $1k+
- Earned
- 1
- Paid projects
- 9
- Followers
Senior Database Engineer | Scalable Database SystemsJohnny Ha
Starting at$60 /hr
I design, build, and optimize scalable, production-grade database and data engineering systems that power modern applications. With senior-level experience across startups and enterprise environments, I help teams turn data into a reliable, high-performance foundation for growth.
This service focuses on database architecture, data pipelines, performance optimization, and reliability, ensuring your systems are secure, maintainable, and built to scale. Whether you’re launching a new product, scaling a SaaS platform, or modernizing legacy infrastructure, I deliver database solutions designed for real-world production workloads.
What's included
Scalable Database Architecture & System Design
Design of a robust, scalable database architecture tailored to your application’s workload and growth requirements. This deliverable focuses on reliability, performance, and long-term maintainability.
Includes:
Database technology selection (PostgreSQL, MySQL, NoSQL, etc.)
Schema and data model design
Read/write scaling strategies
Indexing and partitioning strategy
High-availability and replication planning
Production-Ready Database Development & Implementation
Implementation of a secure, optimized, and production-ready database system integrated with your application or platform.
Includes:
Database schema creation and migrations
Query optimization and performance tuning
API-ready data access patterns
Secure role-based access control
Transaction and consistency management
Data Engineering & ETL/ELT Pipelines
Design and development of automated data pipelines to ingest, transform, and store data reliably at scale.
Includes:
ETL/ELT pipeline design and implementation
Data validation and transformation logic
Scheduling and orchestration
Monitoring, logging, and error handling
Integration with analytics and reporting tools
Database Performance Optimization & Scaling
Audit and optimization of existing database systems to improve speed, reliability, and scalability under real production load.
Includes:
Query profiling and bottleneck analysis
Indexing and caching strategies
Schema refactoring
Load testing and capacity planning
Performance benchmarking and reporting
Data Migration & Modernization
Safe and efficient migration of databases from legacy systems to modern, scalable infrastructure with minimal downtime.
Includes:
Migration planning and risk assessment
Data integrity validation
Zero or low-downtime migration execution
Post-migration performance tuning
Documentation and rollback strategy
Analytics-Ready Data Models & Warehousing
Design of analytics-friendly data models and warehouse structures to support business intelligence and reporting.
Includes:
Dimensional modeling (star / snowflake schemas)
OLAP-ready datasets
Data aggregation and optimization
Integration with BI tools
Performance tuning for analytical queries
Database Security, Backups & Reliability
Implementation of database security and reliability best practices to protect critical business data.
Includes:
Access control and permission management
Encryption at rest and in transit
Automated backups and restore testing
Disaster recovery planning
Monitoring and alerting setup
$60 /hr