Senior Data Scientist - Jumia (Full Time)

Senior Data Scientist - Product Sorting

Jumia is the leading pan-Africa e-commerce platform. Founded in 2012, Jumia’s mission is to improve the quality of everyday life in Africa by leveraging technology to deliver innovative, convenient and affordable online services to consumers, while helping businesses grow as they use our platform to reach and serve consumers.

Our platforms consist of our marketplace, which connects sellers with consumers, our logistics service, which enables the shipment and delivery of packages from sellers to consumers, and our payment service, which facilitates transactions among participants active on our platform in selected markets. Through our online platforms, consumers can access a wide range of physical and digital goods and services, fashion, electronics, beauty products and also hotel and flight bookings or restaurant delivery.

With over 3,000 employees in 14 countries spanning across 6 African regions, Jumia is led by top talented leaders offering a great mix of local and international talents and is backed by very high-profile shareholders. Jumia is committed to creating sustainable impact for Africa. Jumia offers unique opportunities in a vibrant and booming environment, creating new jobs, new skills, and empowering a new generation. We are looking for talented people with a passion for Africa to join our team and embark on our exciting journey!

What's this job all about?

A key element to help Jumia grow is to use an unprecedented amount of data available to make smart decisions.Data Science team is an agile and international team spread across different countries. Data Scientists are working closely with Big Data engineers, Marketing stakeholders and Product owners. Currently, our  Data Science team is supporting different business areas mainly - Recommender Systems, CRM,  Product Search & Sort, Content improvement. To take us to the next level, we are looking for a Senior Data Scientist with deep expertise and unrivalled enthusiasm in ranking problems.As a Senior Data Scientist, your mission will be to help our millions of consumers finding the right product. You will lead our global effort to improve product search & sort relevance, our consumers need to be able to find seamlessly the products they are looking for, but we also want to inspire them by helping them discover other products. To tackle one of the most complex and fascinating problems of e-commerce you will mine millions of queries and products interactions to find the most relevant one for each of our consumers. With the support of other Data Scientists you will be responsible for analyzing large amounts of data, building complex models (using various machine learning techniques, learning to rank, classification, regression), improving their accuracy and deploying these models with the help of our Big Data Engineers. Your work will serve millions of consumers and will have a direct impact on Jumia’s goals.The ideal candidate should be able to utilize large datasets to improve the performance of various pages (catalog, search result and campaign). The candidate should be able to easily implement technologies such as LTR (LambdaRank, LambdaMART-xgboost,...) to serve our customers with the most relevant product from large catalog.


Main responsibilities

-        Develop end-to-end understanding of the search & sorting features including technical implementation

-        Design and develop state of the art ranking algorithms to optimize performance of product Search & Discovery

-        Conduct AB Test to measure the effectiveness of your solutions

-        Work closely with the engineering team to integrate machine learning (ML) algorithms into the platform such as ElasticSearch

-        Help in the design of new features in the product, and drive innovation inside the company

-        Mentor and coach other data scientists





-        PhD or Master degree (with 5+ years of experience) in data science or similar field

-        Very comfortable using pandas, numpy, scikit-learn, xgboost and matplotlib

-        Experience in one or more programming languages used for data analysis (Python, R, etc.)

-        Hands on experience with Deep Learning related libs (e.g. TensorFlow, Keras, PyTorch).

-        Proven experience in ranking models (LTR - LambdaRank, LambdaMart-xgboost )

-        Advanced SQL

-        Knowledge of applied statistics (fit regression curves, build predictive models, statistical significance)

-        Experience with A/B testing

-        Good communication skills

-        Nice to have: Knowledge of multi-arm bandit and experience creating and driving large scale ETL pipelines

 We offer:

-        A unique experience in an entrepreneurial, yet structured environment

-        The opportunity to become part of a highly professional and dynamic team working around the world

-        An unparalleled personal and professional growth as our longer-term objective is to train the next generation of leaders for our future internet ventures

Please send your CV in English. CV in other languages will not be considered.