Data Scientist

Jellyfish; Johannesburg; Hybrid; ZAR 600,000 - 900,000; Full time

Benefits offered by this job

Discretionary bonus

Remote work up to 60%

Flexible hours

Family leave

Course allowance

Job summary

Jellyfish is seeking a driven Data Scientist to join our Investment Analytics practice. Reporting to the Director of Data Science, you will develop data-driven insights and predictive models to improve media performance and client outcomes.

You will collaborate with cross-functional teams, implement advanced measurement approaches, and document analytics projects for scalable reuse across the organisation while enjoying flexible work arrangements.

Qualifications

• 3–5 years of experience in a data role.
• Proficiency in Python and SQL.
• Experience with data visualization tools (Tableau/Looker/Matplotlib).
• Knowledge of marketing analytics platforms and measurement approaches.

Responsibilities

• Analyse data to uncover hidden trends and deliver actionable insights.
• Explain and promote data science methodologies across teams.
• Develop predictive models to improve media performance and outcomes.
• Collaborate with platform partners to expand analytics capabilities.
• Document analytics projects to enable replication and scaling.

Skills

Python

SQL

Data viz

Tools

Tableau

Looker

Matplotlib

Job description

At Jellyfish, we believe in the power of diverse perspectives and inclusive collaboration. We welcome individuals who excel in collaborative, varied teams and value the unique contributions that each person brings to the table.

Jellyfish is a global digital marketing agency; a unique fusion of tech enthusiasts, creative minds, and media and data experts all united to empower our clients along their digital journey. Our commitment to embracing diverse perspectives fuels our innovation and strategies that challenge the status quo, reinvent media activation, and craft influential stories for our global clients and their customers. Join us in shaping a future where business growth and personal fulfilment go hand in hand

Job Description

Reporting to our Director of Data Science, Investment Analytics, you will create an impact within our Investment Analytics practice and help with the Paid Media data applications that Jellyfish uses to lead expertise, improve, and transform solutions and services for our clients.

You’ll help lead complex data science solutions, guiding multi-capability presentations, and taking ownership of advanced measurement and testing for our clients. Join us in our mission to deliver data-inspired excellence!

Your Primary Responsibilities Will Include

• Analyse data to discover hidden trends; deliver insights and analysis with clear applicable recommendations.
• Dedicate time to explaining and promoting the use of data science methodologies such as Geo-based Incrementality. Experiments, Media Mix Models, Causal Impact Studies, and other statistically sound testing approaches. Ensure these methodologies enhance campaign performance for existing clients, providing tangible improvements and insights.
• Develop, and implement predictive models to improve and improve media performance, customer experiences, revenue generation, and other outcomes.
• Work with platform partners to grow the suite of mathematical techniques for Incrementality Testing, Media Mix Modelling and Data Clean Rooms using both open-source and in-house code to create an excellent offering for clients.
• Document analytics projects in a manner that ensures specific processes can be replicated and scaled across an organisation.

Qualifications

• Programming proficiency in Python and SQL.
• 3-5 years of experience in a data role.
• Proficiency in visualising data using Tableau, Looker, Matplotlib, or equivalents.
• Knowledge of the marketing ecosystem and measurement framework, including paid display, search, social, video, organic, web, and app.
• Experience analysing media and web data, such as Amazon Marketing Cloud, Google ADH, Campaign Manager, Meta, and Google Analytics, .
• Familiarity with media measurement solutions, such as media mix modelling, incrementality, and attribution models.
• You seek and implement solutions to improve and automate processes.
• An understanding of machine learning concepts is great—hands-on experience is a bonus.
• A collaborative mindset—you value diverse perspectives, work well in teams, and are motivated by shared goals.
• Problem-solving skills—when faced with challenges, you work with others to explore options and identify practical solutions

We emphasise skills, expertise and behavioural attributes over years of experience and traditional degrees.

Additional Information

Join Jellyfish and experience a workplace where we prioritise your growth, celebrate your contributions, and empower you to tailor your work environment to suit your needs.

• Reward: You'll be eligible to join our discretionary annual bonus scheme.
• Custom Work Environment: Work remotely for up to 60% of your days and shape your day between 8am and 6:30pm with flexible working hours.
• Family Support: Enjoy 14 weeks of paid leave for primary caregivers and 4 weeks of paid leave for secondary caregivers. We also provide £1000 (or equivalent) towards courses for returning primary caregivers to support your transition back into work.

“Jellyfish will give preference to Employment Equity candidates in accordance with the company’s Employment Equity Plan and its Aff… measures.”