Theunie Chamberlain

Full Stack Software Developer & Data Analyst

Based in Cincinnati, Ohio, USA

Summary

I am a Full Stack Software Developer with a strong data background: eleven years across software development, SQL and data analysis, including three years as a Project Manager and Data Analyst. I work day to day in C# and ASP.NET against SQL Server, drop into C++ where performance matters, and bring solid Python and R experience from my analytics work. I excel in problem-solving and logical thinking, with a proven track record of leading teams, optimizing systems, and delivering data-driven insights to drive business growth. In my personal capacity, I work on a Linux-based system, further honing my technical skills and adaptability.

About Me

I love working with numbers, helping people when they struggle and resolving their problems

Skills

Technical Skills

Programming Languages: Proficient in JavaScript, Python, Java, C#, R-Programming, Bash, C++
Web Development: Experience with HTML, CSS, JavaScript, PHP
Database Management: All Flavors of SQL and NoSQL databases like SQL Server, MySQL, PostgreSQL, MongoDB, SSRS, SSIS
Version Control: Proficient in using Git and GitHub/Bitbucket, Azure DevOps
APIs: Experience with RESTful and GraphQL APIs.
Cloud Platforms: Experience with AWS and Google Cloud

Soft Skills

Problem-Solving: Strong analytical skills to debug and resolve complex issues.
Collaboration: Experience working in agile teams and using collaboration tools like Jira, Trello, Slack and DevOps.
Communication: Ability to convey technical information clearly to non-technical stakeholders.
Adaptability: Willingness to learn new technologies and adapt to changing environments.
Project Management: Ability to manage multiple tasks and projects efficiently.
Attention to Detail: Ensuring code quality and adherence to best practices.

Other Skills

Continuous Learning: Commitment to staying updated with the latest industry trends and technologies.
Languages I am very adept at learning languages, I am able to speak fluently and write in English and Afrikaans. I am currently learning German A2 level, and I am able to read Hebrew, Greek and Latin

Work Experience

Full Stack Software Developer

Pepla Software Solutions | September 2025 - August 2026

C#
ASP.NET
SQL Server
C++
SSRS
SSIS

As Full Stack Developer

Conducted full-stack development of web applications using C# and ASP.NET (ASPX) technologies.
Designed, developed, and optimized relational databases using SQL Server, including writing complex stored procedures, functions, and efficient queries.
Maintained and enhanced performance-critical backend services and modules, utilizing C++ where necessary for high efficiency.
Provided comprehensive Service Level Agreement (SLA) support, quickly debugging and resolving critical application issues to ensure system stability.

Intermediate SQL Developer

Direct Transact | February 2023 - September 2025

SQL
C#
Delphi
SSRS
SSIS
PostgreSQL

SQL Developer

Develop and maintain SQL systems, including DDL, DML, DCL, and TCL components.
Engineer and sustain C# and Delphi systems to ensure the stability of API connections.
Provide standby support to uphold the integrity and health of banking systems during nighttime operations.
Resolve complex issues, optimize performance, and design front-end functions in high-pressure environments.

Super User/Data Analyst

KestSCI/RMSA | October 2021 - February 2023

Python
R
WMS/WCS/PLC systems

As Super User:

Investigate and mitigate any problems related to data, network, connection etc. on the WMS/WCS/PLC systems of our biggest client.
Correct any data loss, corruption or updates required on the WMS/WCS system, as well as designing client specific reports.
Investigate any theft/product loss by tracking the product through WMS/WCS logs.
Ensure the Developers and engineer do the above diligently.

As Data Analyst using python and R-Language:

Time studies both measuring and analysing.
KPI’s based on models designed for the customers.
Process analysis and modelling (including SOP design)
Forecast modelling and developing frameworks for use by customers.
Final notes and editing of Analysis documentation before submission to customer and CEO.
Ensuring the data analysis was done correctly.

Project Manager/Data Analyst

KestSCI/RMSA | November 2019 - October 2021

Python
R

As Project Manager:

Manage Projects and enforce timelines and budget
Manage Site Managers and help enforce site safety
Manage client expectations
Manage suppliers

As Data Analyst using python and R-Language:

Time studies both measuring and analysing.
KPI’s based on models designed for the customers.
Process analysis and modelling (including SOP design)
Forecast modelling and developing frameworks for use by customers.

Project Administrator

KestSCI/RMSA | February 2019 - November 2019

General filing, document editing
Generate Health and safety files
General administration

Intern

SilverSurge | February 2015 - February 2019

SQL
C#
Java

As intern I was tasked with SQL, C# and Java development
Debugging issues to identify issues and solve problems

Education

BTh Ancient Languages

North West University | 2016-2018

Delphi
C++
Visual Basic
SQL

Distinctions in Hebrew, Aramaic and Text Criticism
Part of Student Representative Council

Matric

Hoër Volkskool Potchefstroom | 2014

Scratch
Delphi
SQL

Completed with two extracurricular subjects.

Theunie Chamberlain

Cincinnati, Ohio, USA

+1 (283) 222-9399

ctheunie@theunie.me

linkedin.com/in/ctheunie

Professional Summary

Technical Skills

Programming Languages: Proficient in JavaScript, Python, Java, C#, R-Programming, Bash, C++
Web Development: Experience with HTML, CSS, JavaScript, PHP
Database Management: All Flavors of SQL and NoSQL databases like SQL Server, MySQL, PostgreSQL, MongoDB, SSRS, SSIS
Version Control: Proficient in using Git and GitHub/Bitbucket, Azure DevOps
APIs: Experience with RESTful and GraphQL APIs.
Cloud Platforms: Experience with AWS and Google Cloud

Soft Skills

Problem-Solving: Strong analytical skills to debug and resolve complex issues.
Collaboration: Experience working in agile teams and using collaboration tools like Jira, Trello, Slack and DevOps.
Communication: Ability to convey technical information clearly to non-technical stakeholders.
Adaptability: Willingness to learn new technologies and adapt to changing environments.
Project Management: Ability to manage multiple tasks and projects efficiently.
Attention to Detail: Ensuring code quality and adherence to best practices.

Other Skills

Continuous Learning: Commitment to staying updated with the latest industry trends and technologies.
Languages: I am very adept at learning languages, I am able to speak fluently and write in English and Afrikaans. I am currently learning German A2 level, and I am able to read Hebrew, Greek and Latin

Professional Experience

Pepla Software Solutions

Full Stack Software Developer | September 2025 - August 2026

C# · ASP.NET · SQL Server · C++ · SSRS · SSIS

As Full Stack Developer

Conducted full-stack development of web applications using C# and ASP.NET (ASPX) technologies.
Designed, developed, and optimized relational databases using SQL Server, including writing complex stored procedures, functions, and efficient queries.
Maintained and enhanced performance-critical backend services and modules, utilizing C++ where necessary for high efficiency.
Provided comprehensive Service Level Agreement (SLA) support, quickly debugging and resolving critical application issues to ensure system stability.

Direct Transact

Intermediate SQL Developer | February 2023 - September 2025

SQL · C# · Delphi · SSRS · SSIS · PostgreSQL

SQL Developer

Develop and maintain SQL systems, including DDL, DML, DCL, and TCL components.
Engineer and sustain C# and Delphi systems to ensure the stability of API connections.
Provide standby support to uphold the integrity and health of banking systems during nighttime operations.
Resolve complex issues, optimize performance, and design front-end functions in high-pressure environments.

KestSCI/RMSA

Super User/Data Analyst | October 2021 - February 2023

Python · R · WMS/WCS/PLC systems

As Super User:

Investigate and mitigate any problems related to data, network, connection etc. on the WMS/WCS/PLC systems of our biggest client.
Correct any data loss, corruption or updates required on the WMS/WCS system, as well as designing client specific reports.
Investigate any theft/product loss by tracking the product through WMS/WCS logs.
Ensure the Developers and engineer do the above diligently.

As Data Analyst using python and R-Language:

Time studies both measuring and analysing.
KPI’s based on models designed for the customers.
Process analysis and modelling (including SOP design)
Forecast modelling and developing frameworks for use by customers.
Final notes and editing of Analysis documentation before submission to customer and CEO.
Ensuring the data analysis was done correctly.

Project Manager/Data Analyst | November 2019 - October 2021

Python · R

As Project Manager:

Manage Projects and enforce timelines and budget
Manage Site Managers and help enforce site safety
Manage client expectations
Manage suppliers

As Data Analyst using python and R-Language:

Time studies both measuring and analysing.
KPI’s based on models designed for the customers.
Process analysis and modelling (including SOP design)
Forecast modelling and developing frameworks for use by customers.

Project Administrator | February 2019 - November 2019

General filing, document editing
Generate Health and safety files
General administration

SilverSurge

Intern | February 2015 - February 2019

SQL · C# · Java

As intern I was tasked with SQL, C# and Java development
Debugging issues to identify issues and solve problems

Education

North West University

BTh Ancient Languages | 2016-2018

Delphi · C++ · Visual Basic · SQL

Distinctions in Hebrew, Aramaic and Text Criticism
Part of Student Representative Council

Hoër Volkskool Potchefstroom

Matric | 2014

Scratch · Delphi · SQL

Completed with two extracurricular subjects.