Tandi Dell,南非豪登省约翰内斯堡的开发者
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Tandi Dell

Verified Expert  in Engineering

Data Engineer and Developer

Location
Johannesburg, Gauteng, South Africa
Toptal Member Since
December 12, 2022

Tandi是一位经验丰富的开发人员,已经解决了25年以上的业务问题. She started her career as a software engineer and transitioned to freelancing as a data specialist more than 15 years ago. During this time, 她设计并开发了关系数据库, data warehouses, data visualizations, and business intelligence solutions. Tandi还执行了数据迁移和集成, created ETL pipelines, 并为现有系统构建了增强的后端功能.

Availability

Part-time

Preferred Environment

T-SQL (Transact-SQL), Microsoft SQL Server, SQL Server Reporting Services (SSRS), Microsoft Power BI, Data Modeling, Business Intelligence (BI), Data Analysis, Data Warehousing, SQL Server Integration Services (SSIS), Data

The most amazing...

...product I've co-owned and developed was a database monitoring tool that became known as Diagnostic Manager when NetIQ acquired it in Houston, Texas.

Work Experience

Consultant

2014 - PRESENT
Altron Karabina
  • Developed SQL Server staging, operational data store (ODS), and data warehouse databases in BI solutions.
  • 设计和开发ETL流程和管道来填充分期, ODS, and data warehouse databases. 源数据和目标数据包括Azure数据湖存储, CRM, CSV and Excel files, SQL tables, and more.
  • Architected and built interfaces between systems. This included the creation of audit logs and error handling as needed to meet the system's requirements.
  • Maintained and supported Power BI dashboards, SSRS reports, SSAS cubes, tabular models, and automated interfaces between systems.
  • Conducted data analysis and profiling to assess data quality and to identify the necessary source-to-target mappings and transformations needed to meet the business requirements.
  • Facilitated requirements gathering workshops and interviews with business users while documenting the identified business rules and requirements.
  • 实现关系数据建模,以设计可操作的数据存储.
  • 执行维度数据建模以生成项目的总线矩阵, following the Kimball methodology. The developers used the bus matrix to create conformed dimensions and fact tables in the data warehouse.
  • 分析遗留系统和环境,为升级或退役做好准备.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL),商业智能(BI), Data Warehousing, Data Integration, SQL Server Integration Services (SSIS), SQL Server Reporting Services (SSRS), Microsoft Power BI, Azure, ETL, Data Modeling, Data Profiling, Data Warehouse Design, Agile Sprints, Waterfall Methodology, SQL Server BI, Reporting, Technical Design, DAX, MDX, SQL Server Analysis Services (SSAS), Requirements Analysis, Data Analysis, Data Visualization, SQL, Microsoft Excel, Data, Data Cleaning, Data Cleansing, Data Analytics

Consultant

2008 - 2013
EnterpriseWorx
  • Engineered processes and reports to verify the integrity of the data on the clients' BI platform.
  • 为一家零售连锁店在SAP环境中开发带有接口的主数据解决方案.
  • Built reports and dashboards to enable the Master Data Team and Data Stewards to identify and consolidate duplicate products across different retail chains to obtain a golden record for each product.
  • Created automated data feeds from systems on multiple disparate platforms for an SAP data migration project.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL), ETL, SQL Server Integration Services (SSIS), SQL Server Reporting Services (SSRS), Data Migration, Master Data, Data Integration, Reporting, Data Analysis, SQL, Data, Data Cleaning, Data Cleansing, Data Analytics

Consultant

2007 - 2010
Altron Karabina
  • 在现有的业务关键型SQL BI系统上执行故障排除和稳定.
  • 为现有商业智能解决方案提供用户支持和维护.
  • 为制造环境中使用的多个子系统创建ETL模块.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL), SQL性能, SQL Server Reporting Services (SSRS), ETL, Business Intelligence (BI), Data Warehousing, SQL Server Integration Services (SSIS), SQL Server BI, Reporting, Data Analysis, Data Modeling, Requirements Analysis, SQL Server Analysis Services (SSAS), Technical Design, SQL, Data, Data Cleaning, Data Cleansing

Consultant

2006 - 2007
Entelect
  • Assessed the client's existing reporting solution and proposed improvements that offered a more flexible and extensible solution that could carry the company into the future.
  • 为一个蜂窝提供商开发了一个报告和BI解决方案.
  • 开发ETL流程,将数据从ERP系统加载到操作数据存储.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL),商业智能(BI), ETL, SQL Server Integration Services (SSIS), Reporting

Consultant

2005 - 2006
IDS Consultants
  • 为商业智能项目创建ETL流程.
  • Developed exception reports used in fraud detection.
  • 建立了红旗或绿灯申请人的审查程序.
Technologies: Microsoft SQL Server, SQL Server Integration Services (SSIS), SQL Server Reporting Services (SSRS), T-SQL (Transact-SQL), ETL, Reporting, SQL Server BI, Data Analysis, Data Modeling, SQL

Business Analyst and Software Development Manager

2003 - 2005
Smollan
  • 在现有的工资系统上开发一个人力资源报告模块.
  • 为薪资部门提供薪资系统的技术支持.
  • 担任公司内部战略项目的技术顾问.
  • Investigated technologies and products that could add value and provide a competitive advantage for the company.
  • 围绕人才获取系统收集并记录用户需求.
  • 管理人才获取系统的开发.
  • Built a Visual Basic.NET (VB.NET) module for a call center application.
Technologies: VB.. NET, T-SQL (Transact-SQL), RPG, Microsoft SQL Server,需求分析

Volunteer

2003 - 2003
Freeme Wildlife Rehabilitation Centre
  • 建立了一个准入系统来记录所有来到中心的动物.
  • Developed reporting over the system to show success rates, releases, injuries, diseases, etc.
  • 收集并运送受伤的动物和捐赠的食物.
技术:Microsoft Access,软件开发,报表

Software Engineer

2002 - 2003
NetIQ
  • 开发并维护了一个用VB编写的SQL Server监控系统.NET.
  • Provided skills and knowledge transfer to the rest of the SQL Server product team on analyzing and correcting common customer SQL Server problems.
  • Attended to customer support issues that could not be dealt with by the first and second-line customer support team.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL), Software Development, SQL Performance, VB.NET, Waterfall Methodology, SQL

Senior Software Developer

1999 - 2002
Subquery Innovations
  • 开发和维护一个用Visual Basic 6 (VB6)编写的SQL Server监控系统.
  • 协助产品的市场推广和国际会议的销售.
  • Maintained the company website, including HTML content updates, uploaded new releases, and upgraded software products using FTP utilities.
  • 处理电话和邮件客户支持问题.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL), Software Development, SQL Performance, Visual Basic, SQL

Software Developer

1996 - 1999
Qmuzik
  • 开发和维护一个用VB6编写的ERP系统模块.
  • 为ERP应用程序创建了一个数据仓库组件.
  • 为ERP应用程序构建了高管信息报告模块.
  • Assisted with user training, 包括编写培训材料和介绍培训主题.
Technologies: Microsoft SQL Server, T-SQL (Transact-SQL), Visual Basic, Software Development, SQL Performance, Reporting, SQL

Developer

1990 - 1996
Investec Group
  • 建立了一个电子系统,使银行每月的工资发放过程自动化, which resulted in substantial time and cost savings.
  • Set up data cleansing and staging routines to automate data transfer between disparate systems and platforms such as Sybase and the AS400.
  • 开发和维护RPG和LANSA编写的系统, which integrated with the primary banking system.
  • 担任银行内部IT部门与特定业务部门之间的关系经理. The goal was to keep the business unit informed of any new IT strategies and to assist the business unit with obtaining IT solutions to any business challenges.
  • Coordinated development requests and allocated appropriate developers to the tasks using MS Project.
技术:AS400, RPG, LANSA,软件开发

Investment Fund Reporting

创建了一个与投资组合相关的自动报告解决方案. 在多维多维数据集和数据仓库上开发多组报告. 每一组报告都需要动态标记(徽标、颜色、字体等).),以便同一份报告可以用于不同的客户端.

The solution included the following:
•每月基金业绩报告以pdf格式生成.
• Consolidated quarterly reports that leveraged off and incorporated the monthly reports by dynamically changing certain of their properties, also generated in PDF format.
•使用SSRS自动更新PowerPoint演示文稿中的嵌入式图表和图像.
• Downloadable paginated reports for internal use within the company and for sharing with partners in a combination of Excel and PDF reports.

I was responsible for liaising with the business to determine the exact requirements for each new report set, 开发报表使用的MDX和T-SQL查询, and developing the reports themselves.
The automated reporting solution replaced a labor-intensive manual process and saved the company thousands of person-hours per month.

Finance System Integration

客户的ERP系统缺少关键功能. In addition, 他们现有的金融系统接口基本上是手动的, 克服这些限制的过程非常耗时, prone to errors, and resulted in high-level, aggregated transactions in the finance system.

在这个项目中,我通过提供以下内容来解决局限性:
•开发SQL模块,提供ERP系统中缺少的再保险功能.
创建ERP系统之间的自动化集成, the reinsurance module, and the finance system. Business users could also execute the interface on-demand through a Power Flow App component.
•创建用于报表的操作数据存储.
• Supplemented existing financial reports with additional SSRS paginated reports that could be downloaded for further analysis.

CRM Data Integration

Created a set of SQL Integration Services (SSIS) packages using the KingswaySoft components to load data into Dynamics CRM. It was necessary to have full audit capability to identify such things as the number of source records, destination records, count of new records loaded, updated records, error records, and package execution time.

During this project, I worked closely with the team of CRM developers to ensure that the pipeline I developed delivered the expected data within the required timeframes.

所开发的审计日志超出了客户的期望. They were delighted with the fact that they could easily build their own reports on the data to address any queries raised by auditors.

Report Usage Analysis

Analysis of legacy reporting platforms in preparation for decommissioning the environments in favor of an Azure Databricks reporting and analytics environment. 在这个项目中,我主要负责以下工作:

• Conducting workshops with business users to understand their report usage and critical report needs.
• Facilitating workshops with technical resources to understand the legacy environments and the proposed new reporting environment.
• Creating SQL scripts over the SSRS metadata to identify recently used SSRS reports and the databases and tables referenced by them.
• Building SQL scripts over an Azure Databricks database to identify usage stats on Power BI reports in both Premium and Pro capacity.
•开发SQL脚本来识别跨服务器和跨数据库查询.
1992 - 1996

数学和计算机科学学士学位

南非大学-比勒陀利亚,南非

JUNE 2020 - PRESENT

AZ-900: Microsoft Azure Fundamentals

Microsoft

Tools

SQL Server BI, Microsoft Power BI, Microsoft Access, Microsoft Excel

Languages

T-SQL (Transact-SQL), SQL, RPG, Visual Basic, VB.NET, MDX

Paradigms

ETL,商业智能(BI),需求分析

Storage

Microsoft SQL Server, SQL Server Integration Services (SSIS), SQL Server Reporting Services (SSRS), Data Integration, SQL Performance, SQL Server Analysis Services (SSAS)

Platforms

Azure

Other

Data Warehousing, Reporting, Data Migration, Data, Data Cleaning, Data Cleansing, Data Analytics, Data Analysis, Data Modeling, Data Profiling, Data Warehouse Design, Technical Design, Data Visualization, Software Development, AS400, LANSA, Master Data, Agile Sprints, Waterfall Methodology, DAX

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