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Johannesburg: Data Scientist: Marketing posted by Lesaka Technologies

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Job Description

Lesaka Technologies is seeking a Data Scientist: Marketing to turn customer and behavioural data into actionable marketing interventions. This is a hands-on role where youll combine data science, engineering, and marketing analytics to optimize campaigns and drive measurable business outcomes. What Youll Do Build and maintain marketing datasets, pipelines, and automation workflows using Google Cloud (Data Fusion, Dataflow, Pub/Sub, BigQuery) , with Azure integration where needed. Develop segmentation, propensity, churn, and uplift models to identify who to target, what message to send, and through which channel. Operationalize models for campaigns across SMS, email, push, USSD, call centre, WhatsApp , and other channels. Measure campaign performance and refine models with incrementality testing, A/B experiments, and KPIs . Ensure data quality, compliance, and auditability across marketing data. What Success Looks Like in the First 90 Days End-to-end marketing data flow is mapped and understood. A production-ready targeting model or baseline scoring approach is live. Campaign measurement framework (dashboards, tables, KPIs) is established. Data quality risks are documented and mitigated. Required Skills & Experience 3 years in data science or applied analytics in fintech, banking, telco, retail, or similar customer-scale environments. Strong Python and SQL , with experience in BigQuery. Experience with supervised learning , segmentation/clustering, uplift or causal models. Hands-on experience delivering pipelines on GCP , including batch and streaming workflows. Experience integrating Azure Data Factory or mixed-cloud pipelines is a plus. Strong engineering mindset: reproducible pipelines, version control, and operational support. Nice to Have Marketing automation or campaign tooling exposure. Knowledge of MLOps, model monitoring, and feature stores. Experience with identity resolution, customer matching, and fraud/credit signals. Familiarity with South African regulatory and privacy requirements. Personal Traits Enjoys turning messy real-world data into actionable insights. Comfortable challenging assumptions with evidence. Outcome-driven, not just model-driven.

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About Scientific / QA Jobs in Gauteng

In Gauteng, the demand for scientific and QA (Quality Assurance) professionals is on the rise due to the growing need for innovative solutions in various industries. Typically, these roles are sought after by organisations seeking to improve product quality, ensure compliance with regulatory requirements, and enhance their overall competitiveness. Generally, job seekers in this field can expect a strong job market with a range of opportunities across different sectors.

When it comes to salary expectations, it’s common for scientific and QA professionals in Gauteng to earn salaries within the range of R600 000 to R1 200 000 per annum, depending on factors such as level of experience, company size, and industry sector. However, please note that actual salaries may vary widely based on individual circumstances, and these figures should be used only as a rough guide.

Common skills required for scientific and QA roles in Gauteng include technical expertise in fields such as chemistry, biology, physics, or mathematics; analytical and problem-solving skills; attention to detail; excellent communication and project management skills. Additionally, proficiency in software tools such as SQL, Python, or R is often advantageous. Many organisations also value candidates with experience working with industry-specific regulations, such as those in the pharmaceutical or automotive sectors.

Scientific and QA professionals can be found across various industries, including technology, financial services, manufacturing, and healthcare. In the technology industry, for example, these roles are often crucial to ensuring that software applications meet quality standards and comply with regulatory requirements. Similarly, in the financial services sector, scientific and QA professionals play a vital role in testing and validating banking systems.

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For those seeking career development opportunities, scientific and QA roles can provide a solid foundation for advancement into senior technical positions or leadership roles. Many organisations also offer training and professional development programs to help employees enhance their skills and expertise. With experience and a strong track record of performance, it’s common for scientific and QA professionals in Gauteng to move into management or technical lead roles, where they can oversee teams and drive innovation initiatives.


This information provides general career guidance. Actual salaries and requirements vary by employer.



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