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JEFFREY MAENETJA

@jeffreymaenetja

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Experienced Data Engineer with expertise in data pipelines and ETL processes.

United Kingdom

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What I'm looking for

I am looking for a role that fosters innovation, collaboration, and growth opportunities in data engineering.

I am a Data Engineer with over 8 years of experience in crafting and optimizing data pipelines and ETL processes. My expertise lies in leveraging advanced tools such as Azure Data Factory, PySpark, and Databricks to enhance data security and performance through innovative solutions. I am committed to driving efficient data workflows and maintaining robust source control while continuously exploring cutting-edge technologies to propel data projects forward.

In my recent role as a Data Engineer, I was responsible for the development, maintenance, and support of the Group's warehouse datasets and information interfaces. I designed and implemented data pipelines, orchestrated workflows, and developed ETL processes to ensure data is processed efficiently. My focus on data quality and compliance has allowed me to create roadmaps for data architecture that support long-term business objectives.

Throughout my career, I have collaborated closely with data analysts to understand data requirements and deliver tailored solutions. I have pioneered best practices in ETL development, led critical projects, and implemented robust error handling mechanisms. My goal is to continue enhancing data integration workflows and contribute to informed decision-making within organizations.

Experience

Work history, roles, and key accomplishments

Data Engineer

United Learning

Jul 2022 - Aug 2024 (2 years 1 month)

Engineered robust data pipelines using Azure Data Factory and PySpark, optimising data flow between on-premises and cloud environments. Pioneered ETL processes and data integration strategies, implementing solutions for data cleansing, normalisation, and combining data from multiple sources. Partnered closely with data analysts to understand requirements, delivering tailored solutions supporting l

Azure Data Factory Pyspark ETL Data Pipelines Data Integration Data Analysis

Data Integration Specialist

BankservAfrica

Jan 2020 - Jun 2022 (2 years 5 months)

Optimised ETL processes and implemented advanced design strategies, enhancing data warehouse performance, query speed, and streamlining data integration workflows. Developed a data masking function to protect sensitive information and implemented robust error handling and notification mechanisms. Led ETL activities for critical projects and collaborated with cross-functional teams to align designs

ETL Data Integration Data Warehousing Data Masking Data Security Performance Tuning Error Handling Troubleshooting

ETL Developer

Cornastone

Jul 2018 - Dec 2019 (1 year 5 months)

Designed data processes and strategies, achieving efficient data delivery and collaborating with teams to align designs with business needs. Optimized queries and stored objects, significantly improving performance and supporting teams with ETL code reviews. Monitored production environments, proactively resolving performance issues to ensure reliable system operation.

ETL Data Processing Data Strategy Query Optimization Stored Objects Code Review Performance Tuning

Consultant (ETL Developer)

Redscreen Systems

Mar 2017 - Jun 2018 (1 year 3 months)

Engineered robust ETL solutions for ABSA Bank using Pentaho and Actian integrators, optimising data flows and streamlining processes to enhance efficiency and reliability. Developed ETL mappings and authored technical specifications, identifying and resolving code bottlenecks to improve performance. Collaborated with analysts to refine solutions for new data loads and conducted root cause analysis

ETL Data Integration Pentaho Actian Integrator Root Cause Analysis

End to End Data warehouse developer

ITC Infotech India Limited

May 2016 - Feb 2017 (9 months)

Engineered robust ETL processes and created star schema data models, optimising data warehouse performance and ensuring seamless integration of diverse data sources. Translated business needs into technical specifications and developed comprehensive technical documentation. Executed complex database queries and analyses, delivering actionable insights and supporting ETL jobs with troubleshooting t