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Added 8 days ago
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Software Engineer (.NET / C# and AI/IoT)
Artelia
Montreal, QC
- Full-time
Experience with SQL or NoSQL databases for high-throughput data storage and processing;
Added 8 days ago
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ETL Tester
Hays
Toronto, ON
- Contract
Strong experience with SQL, backend testing, ETL validation, and complex Big-Query queries for data validation, reconciliation, and troubleshooting.
Added 8 days ago
AE
People Data Analyst Co-Op Student
Arc'teryx Equipment
North Vancouver, BC
- Internship
…understand the employee experience and make more informed decisions with tools like Power BI, SQL, Python and Databricks. This is an exciting opportunity to learn how people analytics,…
Added 8 days ago
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Data Analyst
Cyient
Montreal, QC
- Full-time
Work with structured operational data using Python and Excel to clean, analyze, and compute insights
Added 8 days ago
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Lead Full Stack Developer
RBC
Toronto, ON
- Full-time
The RBC Borealis Lumina Platform team is hiring a Lead Full Stack Developer who will bring focus and subject-matter expertise around designing and implementing APIs and UIs for the AWS and…
Added 8 days ago
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Premier ou première spécialiste scientifique – Développement de l’IA et systèmes agentiques // Senior Scientist - AI Dev and Agentic Systems
Pfizer
Kirkland, QC · CAN - QC - Kirkland
- Full-time
Maîtrise experte de Python. Vous écrivez du code que d’autres peuvent exécuter, tester et mettre à jour, et vous maîtrisez les outils modernes de contrôle de version, de gestion des…
Added 8 days ago
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Lead Data Engineer / Data Platform Lead
Apexon
Toronto, ON
- Full-time
Hands-on experience with SQL and analytical databases for writing optimized queries, aggregations, and data transformations.
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Senior Data Engineer :Scala, Spark, Python, Hadoop, Databricks
TD
Toronto, ON
- Full-time
5+ years of experience in data engineering with a strong focus on Python, Scala and Spark.
Added 8 days ago
PP
Sales Operations Analyst
Payworks Payroll Services Canada
Winnipeg, MB
- Full-time
…classification using scikit-learn, XGBoost, or similar libraries. Write SQL to extract, clean, and transform data across sales systems, building reliable pipelines that ensure reporting is…
Added 8 days ago
P
Premier ou première spécialiste scientifique – Développement de l’IA et systèmes agentiques // Senior Scientist - AI Dev and Agentic Systems
Pfizer
Kirkland, QC
- Full-time
Maîtrise experte de Python. Vous écrivez du code que d’autres peuvent exécuter, tester et mettre à jour, et vous maîtrisez les outils modernes de contrôle de version, de gestion des…
Added 8 days ago
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Senior Data Engineer, Analytics
CMLS Financial
Vancouver, BC
- $90,000 to $110,000 CAD / year
Design and maintain ELT pipelines from SQL Server, Azure SQL, REST APIs and SaaS platforms, with incremental loads, safe reruns and clear failure handling.
Added 8 days ago
NG
Senior Data Engineer, Analytics
Nesto Group(e)
Vancouver, BC
- $90,000 to $110,000 CAD / year
Design and maintain ELT pipelines from SQL Server, Azure SQL, REST APIs and SaaS platforms, with incremental loads, safe reruns and clear failure handling.
Added 8 days ago
AS
Python & Database Developer
Axelon Services Corporation
Montreal, QC
- $65.52 USD / hour
- Other
Strong proficiency in Python and experience with object-oriented programming (OOP).
Added 8 days ago
Software Engineer, Driver Earnings
Lyft
Toronto, ON
…engineers for our Driver Earnings Team. We are growing our team with people who want to build, improve, and incorporate technologies that enrich the lives of our community. As an engineer…
Added 8 days ago
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Reporting Analyst
BGIS
Markham, ON
- Full-time
Knowledge of trends in technology relating to software applications, such as Database tools, Power BI, Access, MS office tools, Tableau, SQL, Python, and others is considered an asset.
Added 8 days ago
Student, AI and Software Engineering, Calgary (May 2027)
Cenovus Energy
Calgary, AB
Knowledge/experience with Python, Ruby, JavaScript/TypeScript, PostgreSQL or SQL Server, cloud platforms such as Azure or AWS, object storage, Databricks, Snowflake, Redis, or similar…
Added 8 days ago
Engineer
Toronto Hydro
Toronto, ON
Proficiency in programming and data management tools (e.g., Python, SQL, VBA, Alteryx, Tableau) with demonstrated application in utility engineering
Added 8 days ago
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ETL Tester (Contract)
CoreFactor
Toronto, ON · Greater Toronto Area, Canada
- Contract
Develop and maintain automated data validation, reconciliation, and regression tests using Python, SQL, and other automation utilities.
Added 8 days ago
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ETL Tester (Contract)
CoreFactor Inc.
Toronto, ON · Downtown Toronto (Toronto Dominion Centre / Design Exchange), Ontario
- Full-time
Develop and maintain automated data validation, reconciliation, and regression tests using Python, SQL, and other automation utilities.
Added 9 days ago
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Senior Data Engineer, Temporary
Aviso
Toronto, ON
- Temporary
Implement modern data and analytics practices using tools such as Databricks, Snowflake, Salesforce, Python, and SQL
Added 9 days ago
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Data Analyst
Syntrace
Toronto, ON
- Full-time
- Strong SQL, and experience with Python or a similar language for analysis.
Added 9 days ago
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Senior Agentic AI Developer
CGI
Toronto, ON
- Full-time
Strong programming expertise in Python and SQL.
Added 9 days ago
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Machine Learning Resident - Client: Pratt & Whitney Canada (6 month term)
Amii (Alberta Machine Intelligence Institute)
AB · Edmonton, AB
- Full-time
…Computing Science, AI/ML, Engineering, or a related field, with substantial research or project experience in ML and optimization - particularly in forecasting, predictive modeling, time…
Added 10 days ago
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Senior Quality Process Development Engineer
Semtech
Burlington, ON · CAN - Burlington, ON
- Full-time
Proficiency in Python (or equivalent) for data analysis and ML model development, and strong SQL or equivalent skills for working with large structured production datasets
Added 10 days ago
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Senior Machine Learning Engineer
Skip
Edmonton, AB
- Full-time
Proficiency in Python and SQL; or any other programming languages is a strong plus.

CoreFactor

ETL Tester (Contract)

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Contract

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Job details

Job type: Contract
Apply by: Oct 27, 2026
Posting language: English
Posted: Sep 27, 2026

Original job description

CoreFactor is searching for an ETL Tester on a contract basis for a Financial Services client in the GTA .

This position is hybrid and will require the successful incumbent to go into the office four (4) days per week.

Roles and Responsibilities

Collaborate with developers, business analysts, data engineers, and other stakeholders to identify, troubleshoot, and resolve data quality issues.
Participate in requirements reviews, source-to-target mapping sessions, and design discussions to ensure testability, completeness, and data quality.
Analyze source-to-target mappings, define test strategies, create comprehensive test cases, and perform rigorous data validation.
Validate data accuracy, completeness, and integrity through source-to-target reconciliation and transformation testing.
Execute complex SQL queries, perform backend testing, and validate ETL transformations across Oracle, SQL Server, and BigQuery platforms.
Validate end-to-end ETL workflows, data pipelines, and data movement across source, staging, and target environments.
Work with multiple source systems containing structured, semi-structured, and JSON data.
Develop and maintain automated data validation, reconciliation, and regression tests using Python, SQL, and other automation utilities.
Support continuous improvement of ETL testing processes through automation and reusable testing frameworks.
Own test planning, test execution, defect management, regression validation, test reporting, and testing sign-off for assigned EDW initiatives.
Collaborate with project teams to support release readiness activities and ensure delivery quality.
Maintain test cases, test results, defect logs, and other QA artifacts in Jira, Confluence, and related project repositories.

Requirements

5+ years of hands-on experience in ETL testing, data validation, source-to-target reconciliation, data transformation testing, and end-to-end validation of data pipelines in Data Warehouse environments.
Strong experience with SQL, backend testing, ETL validation, and complex BigQuery queries for data validation, reconciliation, and troubleshooting.
Strong understanding of Data Warehousing concepts, ETL processes, data modeling, and data quality principles.
Hands-on experience with Oracle, SQL Server, BigQuery, Informatica PowerCenter, Airflow/Cloud Composer, and GCP data services.
Experience validating data across source, staging, and target systems, including structured, semi-structured, and JSON data.
Experience developing and maintaining ETL test automation solutions using Python, SQL, or similar technologies for automated data validation, reconciliation, and regression testing.
Proven ability to own test planning, test execution, regression validation, defect management, and testing sign-off activities for EDW initiatives.

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More about this job

Responsibilities

Plan and execute ETL testing, including source-to-target reconciliation, transformation testing, backend validation, and end-to-end data pipeline testing across multiple platforms and data formats. Develop automated validation and regression tests, manage defects and QA artifacts, and support release readiness and testing sign-off for enterprise data warehouse initiatives.

Requirements

Requires 5+ years of hands-on ETL testing and data validation experience, with strong SQL skills and experience writing complex BigQuery queries. Candidates should have data warehousing knowledge and practical experience with Oracle, SQL Server, BigQuery, Informatica PowerCenter, Airflow or Cloud Composer, GCP data services, and Python-based test automation.

Skills

ETL Testing
SQL
BigQuery
Python
Data Validation
Data Transformation Testing
Data Warehousing
Oracle
SQL Server
Informatica PowerCenter
Apache Airflow
Google Cloud Platform
Test Automation
Defect Management
Jira

Visa sponsorship

Not detected in the job text

Keywords

ETL Testing
Data Validation
Source-to-Target Mapping
Data Transformation Testing
Data Warehousing
Data Modeling
Data Quality
SQL
BigQuery
Oracle
SQL Server
Informatica PowerCenter
Apache Airflow
Cloud Composer
Google Cloud Platform
Python
Test Automation
Regression Testing
Backend Testing
Data Pipelines
Structured Data
Semi-Structured Data
JSON
Enterprise Data Warehouse
Jira
Confluence
Defect Management
Release Readiness
Financial Services

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