Available to hire
I’m Olugbenga Ajiga, a data engineer with 9+ years of experience building scalable, high-performance data infrastructure, with hands-on expertise in Azure Databricks, PySpark, and modern lakehouse architectures. I design and maintain end-to-end data pipelines across cloud platforms (Azure, AWS, Google Cloud) to enable cross-platform analytics and business insights.
I enjoy turning data into actionable insights, integrating ML/AI into data workflows, and leading cross-functional teams to deliver robust analytics, dashboards, and data products. I’m passionate about data quality, CI/CD for data workflows, and mentoring junior engineers to improve delivery and impact.
Skills
Language
English
Fluent
Work Experience
Data Engineer at Sense Charity
February 1, 2024 - November 8, 2025Leading data engineering initiatives for a national charity. Built scalable ETL pipelines on Azure Databricks, integrating HR, operational, and third-party data sources into a centralized data warehouse, processing over 102,000 daily records, and enabling cloud data workflows across Azure and Google Cloud (BigQuery). Enhanced data integration from HR to Active Directory, achieving a 95% efficiency gain in user provisioning and access management. Applied AI-driven sentiment analysis on customer feedback datasets, boosting customer satisfaction by 25%. Deployed statistical models to identify performance factors across retail operations, reducing agent errors by 10%. Managed large-scale monthly data profiling and quality checks for third-party imports. Developed T-SQL data cleansing for legacy CRM, processing over 17,000 donor records with BI visualizations. Analyzed event attendance declines, informing a revised outreach strategy.
SQL Developer at EGAS & ELECTRICITY LTD
December 31, 2023 - December 31, 2023Engineered enterprise-scale data solutions handling 53,500+ daily transactions in the energy sector. Maintained regulatory compliance for Ofgem reporting through smart meter and commercial data processing. Built ETL workflows using SSIS with real-time inventory integration, reducing manual reconciliation from 4 hours to 45 minutes daily. Led cloud migration of legacy FUTURA CRM and reporting suite from on-premises SQL Server to Azure SQL and Databricks, migrating 70 SSIS packages, 80+ reports, and 100+ stored procedures, and integrating with AWS S3 for archival storage and compliance. Optimized high-volume data warehouse refreshes, cutting processing time from 6 hours to 2.5 hours for daily loads. Built regional sales dashboards via SQL Server, Excel, and REST API data using SSIS, publishing interactive Power BI dashboards and SSRS KPI reports. Implemented T-SQL-based data quality monitoring across MySQL and SQL Server, increasing address data accuracy from 75% to 95%.
Data Engineer at Allied Worldwide Ltd
May 31, 2023 - May 31, 2023Contributed to cross-functional Scrum teams delivering scalable asset management and donor analytics solutions. Achieved MVP delivery 3 weeks ahead of schedule through effective data dependency mapping. Designed executive dashboards and analytics pipelines in Power BI, leveraging Google Cloud Platform (BigQuery + Cloud Storage) and on-prem SQL sources to track campaign performance and donor churn, reducing monthly reporting time by 50%. Led a data reconciliation project to resolve inconsistencies between Dynamics 365 CRM and the Allied DW, cleaning 17,600+ records and improving email delivery accuracy. Presented monthly insights to C-level executives, driving data-driven decision making. Automated finance reconciliations with SQL scripts and Power BI, reducing monthly reconciliation time by 30%.
Senior Data Engineer at Dangote Industries Ltd
February 28, 2022 - February 28, 2022Managed enterprise data infrastructure supporting 400,000+ monthly queries and a data warehouse valued at over $400k. Architected a high-performance SQL Server data warehouse and led a migration from MS Access to MSSQL Server, saving $50k in licensing and improving system efficiency by 40%. Developed an automated biometric attendance data service, reducing manual data entry by 80% and increasing data accuracy for over 10,000 employees. Evaluated and implemented 15+ third-party applications with project oversight, achieving 95% on-time delivery and $500k savings. Pioneered BI initiatives and analytics to improve supplier evaluations and revenue planning; collaborated with cloud vendors for hybrid data infrastructure (Azure, AWS, Google Cloud) to support BI and advanced analytics.
Education
Master, Information Technology at University of Lagos, Nigeria
January 11, 2030 - November 8, 2025Proficiency Certificate in Management at Nigerian Institute of Management
January 11, 2030 - November 8, 2025B.Eng. Electrical/Electrical Engineering at Federal University of Technology, Akure, Nigeria
January 11, 2030 - November 8, 2025Qualifications
Microsoft Azure for Data Engineering
January 11, 2030 - November 8, 2025Google Cloud Data Engineer Professional
January 11, 2030 - November 8, 2025Google Data Analytics
January 11, 2030 - November 8, 2025Databricks
January 11, 2030 - November 8, 2025DW with MS Azure Synapse
January 11, 2030 - November 8, 2025Masterschool Courses (Business Analytics, Tableau Visualization, Data Visualization with Python, Data Analysis with Python, ML, Churn Analysis)
January 11, 2030 - November 8, 2025Industry Experience
Energy & Utilities, Manufacturing, Non-Profit Organization, Software & Internet, Professional Services
Skills
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