Senior Data Engineer (Quantexa) Location: London (Hybrid, 2 days in Office per week)Duration: 6 months + Rate: Up to £650 per day (Inside IR35) Opus have partnered with a Globally Renowned Data and AI consultancy who''re searching for a Quantexa contractor to help with the delivery of market-leading big data driven transformation programmes. You''ll be joining a high-performing team led by experienced data and AI practitioners who work across solution architecture, advanced analytics, cloud transformation, and multi-million-pound client engagements. Key Responsibilities: Design and build scalable big data pipelines using Quantexa Develop and optimise ETL/ELT processes for high-volume, complex datasets. Deliver entity resolution and network analytics solutions using Quantexa. Integrate data from multiple structured and unstructured sources across enterprise platforms. Build data solutions within cloud-native environments (GCP, AWS, Azure). Ensure data quality, governance, lineage, and security standards are met, supporting solution design for large-scale data transformation programmes. Essential Skills MUST HAVE: Strong hands-on experience with Quantexa implementation and development. Proven experience building and supporting big data platforms. Advanced knowledge of Apache Spark / PySpark. Strong programming skills in Scala and/or Python. Expertise in SQL and large-scale data modelling. Strong cloud experience across GCP, AWS, or Azure. Experience with Databricks, ..... full job details .....