Senior Machine Learning Engineer, Octopus Energy Group
Kraken Technologies
The UK's most awarded energy supplier
Job no longer available
The UK's most awarded energy supplier
1001+ employees
Job no longer available
1001+ employees
Company mission
To make a big green dent in the universe by building a truly sustainable energy system globally.
Role
Who you are
- You don’t need prior energy supplier experience (we can teach you that)
- Passionate about working in energy and contributing to the energy transition
- Curious and self driven - in a field that changes so quickly, its essential you have the initiative to make decisions yourself, and can find solutions to novel problems without lots of help and support
- Learns fast and is enthusiastic about learning new technologies
- A passion for LLMs and the growing ecosystem around them, and hands-on experience with using them in production
- Experience with machine learning, and deploying models in production
- Has an engineering mindset - passionate about building robust tools, and has experience with some of the following technologies: Python, ML python packages like pytorch, huggingface and scitkit-learn, NLP, Kubernetes, SQL to prepare datasets for training and performance tracking
What the job involves
- Kraken is at the heart of Octopus' success, allowing individual agents to be experts in any problem a customer has by handling the whole customer lifecycle, and this wide remit presents a powerful opportunity for the ML team to work to optimise the platform
- We make sure that Kraken provides the right data to continually learn & improve
- We use state of the art NLP to analyse customer messages, suggest actions and help to generate responses
- We crunch billions of data points to train ML models to forecast each customer’s usage
- We do it by hiring clever, curious, and self-driven people, enabling them with modern tools and infrastructure and giving them lots of autonomy
- Our ML team consists of data scientists and front-end and back-end engineers, so that we can rapidly prototype and get innovative features in use in the platform at breakneck speed
- With the rapid progress in language modelling over the last year, we're working hard to make sure that we leverage this new technology to bring better service to customers
- You’ll join our global ML/AI team, and focus on bringing this next generation of AI-powered features to Kraken
- You'll work across the whole product lifecycle: identifying uses of new technologies via exploration, working closely with operations teams to validate that your ideas will bring value, implementing them in collaboration with front and backend engineers, and creating systems to monitor their ongoing performance
- You'll use state of the art LLMs and prompting techniques to create features, train models in-house where appropriate, and stay up to date with changes in the field
- You'll use Python and Kubernetes to deploy models via API, and you'll use MLflow to manage trained models
Our take
According to Octopus, the energy industry in the UK is ruled by a handful of complacent companies peddling fossil fuels, pricing trickery, and poor customer service. Aiming to disrupt the status quo with sustainable energy, Octopus entered the market in 2016 and now supplies energy to millions of homes in a number of countries. Octopus has made a name for itself in energy circles largely because of its “Kraken” technology platform, which it claims is able to reroute energy from renewable sources around a network far more efficiently than competitors.
Octopus further differentiates itself through its aspiration to make everything as easy as possible for consumers, from the simplicity of their bills and the fact that customers are not locked into a contract, so they can leave at any time, to offering customer service over email and social media at times that suit customers. It aims to make the eco‐friendly choice the easy choice, so all of its tariffs use 100% green electricity, while being cheaper than competitors' non-green tariffs.
Its continually creating innovative new products too. For example, Octopus Tracker, where prices change daily to guarantee you get the market rate; Agile, where the price changes every half hour to enable you to benefit from cheap electricity when the sun shines, the wind blows, and the networks are under-utilised. One of the current challenges the company faces is that its products are more complex than its competitors, given that it uses 1000x more data than traditional energy companies. Because of this, it's exploring ways to explain to customers exactly how their products work.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (last 2 of 7 rounds)
Dec 2025
$320m
GROWTH EQUITY VC
Dec 2023
$800m
GROWTH EQUITY VC
Total funding: $2.9bn
Company benefits
- Equity Option Scheme
- Pension Scheme: We'll pay 5%. You can decide what you contribute, starting from 3%
- Money Coach: You may want to think about financial planning. The company has an arrangement with Octopus Money Coach . They offer the opportunity to talk with a professional coach
- Holidays: We're all grown ups, so 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)
- Flexible working: We're passionate about a genuine work-life balance here and we don't pay people to watch a clock. Need to catch that school nativity or work from home? That's cool
- Free Breakfast + other stuff: ice lollies if you're lucky)! Weekly on a Friday we all get together (this happens virtually too) for company updates and drinks - we call it Family Dinner
- Tech: We want to get the best out of our people and get that everyone is slightly different. Have a certain tech requirement? We’ll do our best to get it
- Car Salary Sacrifice: Browse the wide selection of electric vehicles and get a sample quote under our workplace salary sacrifice scheme. If approved, the monthly leasing costs are taken directly from your gross salary each month meaning you're saving on paying some tax
- Cycle to Work Scheme: The Cycle to Work Scheme is a cost effective way to “buy” a bike up to a value of £2.5K, which hopefully is enough for a decent commuting bike, even an electric one. This extends to the cost of accessories and safety equipment as well as the bike
- Season Ticket Loan: Commuting to the office on the regs? If you travel more than twice a week, it’s worthwhile getting an annual ticket. With our Season Ticket Loan, you can spread out the cost over 10 months. It’s quick and easy to sort. Once approved and ordered, your season ticket will be posted to you within 5 days or so
- Maternity leave: 16 weeks full pay + 8 weeks half pay + 15 weeks statutory maternity pay
- Paternity leave: 12 weeks full pay
- Private Medical Insurance: Say goodbye to long waiting lists! For anyone who wants some additional peace of mind when it comes to their health, we offer Private Healthcare Insurance at different levels of cover. The monthly costs are taken directly from your gross salary and spread across 12 months. You even save on National Insurance
- Gym & Yoga: You can get up to 25% discount on gym memberships and we have 45 minute live yoga classes open to all Octopus staff twice a week!
- Headspace: Need some calm in your life? We have 'Octopus Headspace Licences' available
- Eye Test: Free eye test vouchers for all colleagues who use Visual Display Units (VDU). Long spells of VDU work can often be visually demanding and can lead to tired eyes, discomfort, temporary short sightedness and headaches
Company HQ
Soho, London, UK
Leadership
Greg Jackson
(Co-Founder & CEO)Previously an Adviser at Ashcombe Advisers for 9 years and a Non-Executive Director at Zopa for 7 years.
James Eddison
(CTO)Previously CEO at Claripoint for 7 years and CTO at Tangent Labs also for 7 years.
Stuart Jackson
(Co-Founder & CFO)Previously a Director of "Foundation" Business Unit at Barclaycard for 2 years and Chief of Staff, Secured Lending SBU at Barclays also for 2 years.
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