Senior Java Developer (Icon Solutions IPF/Payments) - 6-Month Contract - London

Contracting role based in Reading (Hybrid, 2-3 days in office) for a 6-month engagement within the utilities sector. You will validate the quality, integrity, and accuracy of large-scale data processing solutions across cloud-based data platforms, working across ETL testing, data pipeline validation, and Spark-based environments in an Agile delivery team.

Key Responsibilities:

• Design, develop, and execute test cases for data pipelines and ETL processes
• Validate data quality, integrity, transformation, and migration across systems and environments
• Develop and execute SQL and PySpark scripts to support data validation activities
• Perform testing of Spark and Databricks-based data solutions
• Identify, document, and track defects through to resolution, collaborating with data engineers, developers, and business stakeholders
• Participate in Agile ceremonies including sprint planning, reviews, and retrospectives
• Contribute to test automation initiatives and continuous improvement of testing processes

What You Will Ideally Bring:

• Hands-on PySpark and Spark SQL experience - essential
• Strong SQL skills for data validation and analysis - essential
• Experience working on cloud platforms - Azure preferred; AWS or GCP also considered
• Experience with Databricks or other Spark-based platforms - essential
• Strong understanding of data validation, ETL testing, and data quality methodologies
• 3-5 years of overall QA/Test Engineering experience with 2-3 years in Data, ETL, or Big Data Testing
• Knowledge of Data Warehouse concepts and ETL testing methodologies - preferred

Contract Details:

• Duration: 6 months
• Rate: £440 per day
• Location: Reading (Hybrid - 2 days on-site)
• Start Date: ASAP