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Jobs at Octopus Energy

Data Scientist

Octopus Energy Tokyo | Hybrid

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EN: business
JP: none
5,476,673 JPY on average (est)
Employment Type
Full time

Job Description

Help us make a big green dent in the universe. We're on a mission to drive the global renewable energy revolution, and we need loads more people to help us make our vision a reality.

About the role

In Japan, we are growing fast. You will get to work with every team and across the whole data lifecycle. Your focus will be on building out data pipelines, reports and dashboards that serve our business teams (ops, sales and marketing). You’ll need to ensure our analyses are scientifically robust - making sure the right questions are being asked and that the business decisions we take are truly supported by the data.We’re proud of our science & analytics platform, and you’ll work to make sure that it’s well engineered, understandable, and accessible to non-specialists as its capabilities grow. You’ll become a domain expert, supporting management’s questions and powering our continued growth.


You don’t need prior energy supplier experience (we can teach you that). We’re looking for someone with the below qualities:

  • Passionate about working in energy and contributing to the energy transition
  • High level language skills in English, ability to speak Japanese would be a plus
  • Curious and self driven - as an early data employee, it’s essential you have the initiative to make decisions yourself, and can find solutions to novel problems without lots of help and support
  • Highly data literate and numerate - can make sense of lots of data and shape it into a coherent story
  • Learns fast and is enthusiastic about learning new technologies
  • Has an engineering mindset - passionate about building robust tools, and has experience with some of the below:
  • Python for preprocessing & modelling of data, and engineering data pipelines
  • Writing queries in SQL
  • Building reports and dashboards in a BI tool (ideally Tableau)
  • A/B testing and causal inference

Our data stack

  • AWS cloud infrastructure
  • Databricks Delta Lake for data lake and warehouse storage and querying
  • dbt for data modelling and transformations
  • Spark for large data processing
  • Python data ecosystem as main scripting and analytics language
  • Jupyter and Jupyter Hub for notebook analytics and collaboration
  • Airflow for task scheduling
  • Kubernetes for data services and task orchestration
  • Github, Circle CI, Grafana and Prometheus for version control, deployment and monitoring
  • Tableau and Streamlit as data front ends

About the Company

Since 2015, Octopus has been on a mission to bring affordable, green energy to the world. With the help of our in-house developed technology platform, Kraken, we’ve become the 2nd largest energy supplier in the UK, opened retailers in 7 other countries, and licensed our software to retail giants including E.ON in the UK and Origin Energy in Australia. We’ve reinvented energy products with smart, data driven tariffs to balance customer demand with renewable generation - and we’re the biggest investor in renewable generation in the UK. Our partnership with Tokyo Gas is bringing the Octopus magic to Japan, and we’re looking to add another data scientist to our Tokyo team.Data science and analytics has been at the heart of Octopus’ success, driving insight across all facets of the business. We drive understanding of the performance and optimization of operations teams. Our deep knowledge of the industry and the market allows us to design innovative smart tariffs. We crunch billions of data points daily to supply and manage customers’ energy usage. We do it by hiring clever, curious, and self-driven people, enabling them with modern data tools and giving them lots of autonomy. Our data team consists of scientists and analysts in each of our retail businesses, and a global data engineering team to support them.

Why else you'll love it here

  • Our company culture - We won best company to work for in 2022, on Glassdoor we we're voted 50 best places to work in 2022 and our Group CEO, Greg has recorded a podcast about our culture and how we empower our people 
  • Flexible working environment - genuine work life balance here, we are in the top 5 companies in the UK, we treat you as a human, and do our best to make work and life merge smoothly together 
  • Relaxation - we don’t count your holidays here, we work hard, and so we know you need to play hard as well (within reason of course) 
  • Equity Options Scheme - you own your own part of the business, share options in the whole Octopus Energy Group so we all work together towards success 
  • Office culture - have a certain tech requirement? We’ll do our best to get it. Our offices are also stocked with fruit, breakfast, great coffee and soft drinks. Weekly on a Friday we all get together (this happens virtually too) for company updates and drinks - we call it Family Dinner 
  • Your development is important - we support and help with development including internal and external courses, learning, study support etc, all bespoke to you 

If this sounds like you then we'd love to hear from you.

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.