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Data engineer (Pyspark)

Gazelle Global
City of London
1 day ago
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Senior Data Engineer (Developer) – Pyspark


We are supporting a leading global financial markets infrastructure and data provider as they modernise and scale their core data engineering capabilities. This role sits at the centre of their transformation programme, delivering high-quality data pipelines, models, and platforms that underpin critical services across the business.


Key Responsibilities

Design, build, and optimise scalable data pipelines for both batch and streaming workloads:

  • Develop dataflows and semantic models aligned to analytics and reporting needs
  • Implement complex transformations and performance-focused data processing logic
  • Apply data validation, cleansing, and profiling techniques to ensure accuracy and consistency
  • Implement access controls, data masking, and compliance-aligned security protocols
  • Tune workloads and optimise performance across Spark, Fabric, and Azure components
  • Translate business requirements into technical solutions through close collaboration with analysts and stakeholders
  • Maintain clear documentation and contribute to internal knowledge repositories


Essential Skills

Strong experience developing within Microsoft Azure and Microsoft Fabric:

  • Proficiency in Spark programming including DataFrames, RDDs, and Spark SQL
  • Python and PySpark development experience, including notebook-based workflows
  • Hands-on experience with Spark streaming and batch processing
  • Delta table optimisation and Fabric Spark job development
  • Solid Java programming and OOP understanding
  • Experience working with relational and NoSQL databases
  • Familiarity with GitLab, unit testing, and CI/CD pipelines
  • Strong troubleshooting ability and experience working in Agile environments
  • Excellent communication skills with stakeholder-facing experience
  • Practical experience building ETL workflows, lakehouse architectures, dataflows, and semantic models
  • Exposure to time-series data, financial market feeds, transactional records, and risk-related datasets

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