Data & Analytics
Hire ETL Developers for Scheduled Data Loads
ETL developers move data between systems: extracting it from sources, cleaning and reshaping it, and loading it where it is needed.
The role
What ETL developers do
An ETL developer builds scheduled or event-driven jobs, handles incremental loads and changing schemas, validates records, and makes failures visible. Common projects include CRM to warehouse syncs, legacy data migrations and spreadsheet automation.
Typical deliverables
- Scheduled data extraction and loading jobs
- Data cleaning and transformation logic
- Incremental loads and change handling
- Validation and error reports
- One-time data migrations
Tools you will see
- SQL
- Python
- SSIS
- Talend or Informatica
- Airflow
- Azure Data Factory
Choosing
How to choose ETL developers
What to look for
- Jobs that can rerun safely without duplicating data.
- Validation and logging of bad records.
- Experience with your source and destination systems.
- Handling of schema changes.
Questions to ask
- 1How do you avoid duplicate data when a job reruns?
- 2What happens to records that fail validation?
- 3How would you load only changed data?
- 4How will we know if a job fails?
Planning
Before you post the job
Migration or ongoing sync
A one-time migration and a continuous sync need different designs. Say which you need.
What drives cost
Number of sources, data volume, transformation complexity, frequency and monitoring.
Hiring on Open Lance
- Posting a job and reviewing proposals are free.
- Each milestone is funded into escrow before work starts and paid when you approve it.
- Hire fixed-price, hourly, as a monthly Dedicated Hire, or buy a packaged Drop-In.
- Client fees are shown before you pay and added on top of the work.
FAQ
Questions about hiring ETL developers
Should we use a tool or custom code?
Managed connectors suit common sources. Custom code suits unusual systems or complex rules.
Can they migrate data from an old system?
Yes. Plan mapping, cleaning, test loads and a final cutover.
How often should data sync?
As often as decisions need it. Real-time syncing costs more than daily loads.
Related
Related skills
Post a job for ETL developers
Describe the work and compare proposals. You only fund the first milestone once you have chosen someone.