Job Description Joining Busuu means being part of one of the top EdTech companies in the world, a multiple award-winner recognised for its innovation and impact in language learning. Busuu’s vision is to empower people through languages. We are the world’s largest online community for language learning, with 120+ million registered users. We make learning a language easy by combining AI-powered courses with feedback from our global community of native speakers and lesson content designed for real life. Busuu is part of the global Chegg family. Chegg is the leading student-first connected learning platform and a NYSE listed company. What does a Senior Data Scientist do at Busuu?

• Data exploration and discovery: Extract data and use statistical techniques to analyze and visualize it to uncover actionable insights for making data-driven decisions.
• Training dataset ETLs: Collaborate with ML Engineers to develop robust production-ready ETLs for generating training datasets and feature engineering jobs.
• Advanced model development: Build and optimize an extensive variety of machine learning models for predictive analytics, recommendation and ranking systems, generative AI, optimal search, item response theory, lifetime value estimation, computer adaptive testing, spaced repetition and rating algorithms, churn prediction and many more.
• Collaborative cross-functional work: Collaborate with diverse roles such as ML Engineers, Data Engineers, Business Analysts and Product Managers to embed AI into user-facing and business-critical production systems.
• Innovate: Help shape our AI, data science and A/B testing experimentation strategies and lead applied research spikes to learn about new technologies or ML techniques (such as Deep Learning or LLMs integration).

What we’re looking for in a Senior Data Scientist :

• Excellent skills in Data Science and Machine Learning techniques. Capacity to build, train, evaluate and debug supervised and unsupervised ML models. Strong communication skills for technical and non-technical audiences.
• Advanced programming skills in Python, SQL and Gitflow. Ability to write complex and production-ready ETLs and training processes. Exposure to AWS, Redshift, Sagemaker, Airflow or Kubernetes is highly appreciated.
• Highly-adaptable generalist Data Scientist who is able to collaborate and support different functions within the team, be aware of ML production challenges and keep an impact-driven mindset and capacity to learn new techniques and approaches for different domains (Product, Finance, Marketing).
• Experience in the education/ed-tech sector will be very much appreciated.

At Busuu we want to ensure that you have access to some great benefits:

• Our centrally located offices are well-equipped with free breakfast, plenty of snacks and fresh fruit
• You get 2 free lunches per week at our office that you can choose out of a wide selection of restaurants in the area
• Busuu offers a great Private Health Insurance scheme
• There is a personal training budget just for you, so you can learn more in your field to ensure our employees can continuously grow and progress in their careers
• We like to support our teams with their work-life balance so we offer flexible working hours and a hybrid model of working
• We offer enhanced maternity and paternity leave
• Staying connected as a team is very important to us, so we have lots of social activities for you to join such as team lunches, Thursday socials, quarterly team, and company events

What happens next We aim to have a simple and speedy hiring process and we want to make sure that we are right for you as much as the other way around.

• CV application review - We will review it as quickly as possible
• Let’s chat - Quick chat with our team about your experience and the role
• Interview - With the Hiring Manager
• Case Study - At home case study to show off your skills
• Interview - Interview to review the task and speak with other colleagues in the team

Our platform is for everyone, and so is our workplace. We pride ourselves on embracing our differences, whether they're cultural, racial, religious, or otherwise. This means each one of us comes to work knowing that we have a voice – and a safe, judgement-free zone to speak freely. If you like the sound of that, join us. We'd love to hear what you have to say #LI-Hybrid