Summary
Overview
Work History
Education
Skills
Websites, Portfolios, Profiles
LANGUAGES
Timeline
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Andisiwe Jafta

Andisiwe Jafta

Johannesburg

Summary

Dynamic data science professional with a strong foundation in data and customer analysis, complemented by hands-on experience as a junior data scientist at a global AI company and as a data analyst in the financial services sector. Expertise in leveraging data science techniques to enhance customer satisfaction, inform marketing strategies, and support informed decision-making. Completed a rigorous 9-month data science boot camp at Explore Academy, mastering statistics, data analysis, machine learning, and programming languages including Python, SQL, and Excel. Committed to harnessing the power of data to drive impactful business decisions and eager to tackle new challenges in the field.

Overview

2
2
years of professional experience

Work History

Facilitator

ALX Africa
10.2024 - Current
  • Designed and developed project-based learning content in Python, Pandas, NumPy, SQL, and AI prompt engineering, aligning with ALX’s learner-centred curriculum.
  • Created interactive, browser-based learning tools using Gradio, incorporating scoring systems, AI assistant features, and themed learning environments to enhance engagement.
  • Built a data insights dashboard using Apache Airflow, Streamlit, Docker, AWS, and VS Code to support tracking learner success and course engagement.
  • Collaborated with the Tech Skills Team to review learner deliverables, track progress, and provide structured feedback on both technical and soft skill development.
  • Re-branded and updated educational materials in Google Slides, applying ALX design standards, accessible fonts, and thematic visuals for clarity and consistency.
  • Contributed to the creation and refinement of milestone instructions, logbooks, and feedback templates to support learner understanding and success.
  • Used Excel and internal dashboards to analyze learner data, identify patterns, and suggest improvements to learning materials.
  • Helped maintain a respectful, inclusive digital learning environment through community engagement and communication support.

Junior Data Scientist

ExploreAI
09.2023 - 05.2024
  • Collaborate with the data science team on a three-month project to build a machine learning model.
  • Focus on developing a model that identifies at-risk students within Explore AI Academy.
  • Collect, clean, and preprocess relevant datasets to be used in the machine learning model.
  • Collaborate with internal stakeholders to gather insights and feedback for model improvement.
  • Work with educational data to identify key indicators of student performance and risk.
  • Utilize machine learning frameworks (scikit-learn, TensorFlow) to build and train the predictive model.
  • Conduct rigorous testing and validation of the machine learning model to ensure accuracy and reliability.
  • Create visualizations to communicate model insights and predictions.

Data Analyst

Basic Financial Services
01.2021
  • Conduct in-depth analysis of financial data, including loan performance, repayment trends, and risk assessment.
  • Generate actionable insights to inform decision-making processes related to loan portfolio management.
  • Develop and maintain comprehensive and insightful reports on key financial metrics, loan portfolios, and performance indicators.
  • Administer and manage databases related to client loans, ensuring data accuracy, integrity, and security.
  • Implement data quality control measures to maintain a high standard of data accuracy.
  • Create visually appealing and informative dashboards to represent financial data trends and performance metrics.
  • Collaborate with risk management teams to assess and mitigate potential risks associated with client loans.
  • Utilize statistical models and predictive analytics to identify risk factors and optimize lending strategies.

Data Entry Specialist

Altron People Solutions
01.2019
  • Implemented efficient data entry processes, reducing errors and enhancing the speed of capturing student information.
  • Played a key role in maintaining up-to-date and accurate records, ensuring a reliable database for decision-making.
  • Contributed to the successful enrollment of a significant number of students who faced challenges in gaining university admission.
  • Collaborated with team members to identify alternative opportunities for students, resulting in increased enrollment success rates.

Language Consultant

MPC Recruitment
01.2018
  • Deliver high-quality English language instruction to foreign students through online platforms.
  • Create engaging and interactive lessons that cater to students' language proficiency levels.
  • Collaborate with curriculum developers to enhance and tailor English language courses based on the diverse needs of students.
  • Utilize student data to make informed decisions on instructional strategies and resource allocation.
  • Used data to develop adaptive learning strategies, adjusting lesson plans based on individual student strengths and weaknesses.
  • Stay abreast of educational technology trends and incorporate relevant tools to enhance language learning experiences.
  • Regularly review and update teaching materials and methods based on data-driven insights and feedback.
  • Contribute to the development of best practices in language instruction through data analysis.

Education

Mathematics and Statistics

University of South Africa
01.2025

Certificate - Data Scientist

Explore AI Academy
01.2023

Skills

  • Power BI
  • Python
  • Excel
  • SQL
  • Data Analytics
  • Machine Learning
  • Data Visualization
  • Data Manipulation
  • Version Control
  • Natural Language Processing
  • Amazon Cloud Services
  • Data Cleaning
  • Model Deployment
  • Data Management
  • Model Evaluation and Testing
  • Programming Languages
  • Statistical Analysis
  • Flask

Websites, Portfolios, Profiles

  • Portfolio
  • LinkedIn
  • Github

LANGUAGES

English

Timeline

Facilitator

ALX Africa
10.2024 - Current

Junior Data Scientist

ExploreAI
09.2023 - 05.2024

Data Analyst

Basic Financial Services
01.2021

Data Entry Specialist

Altron People Solutions
01.2019

Language Consultant

MPC Recruitment
01.2018

Certificate - Data Scientist

Explore AI Academy

Mathematics and Statistics

University of South Africa

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Andisiwe Jafta