Senior Fullstack Engineer, Octopus Energy Group
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
- If you’re motivated by purpose, adventure, and the chance to shape a high-impact business, MOPO offers the perfect opportunity
- You're excited by the prospect of building technology that transforms off-grid energy access in Africa
- You have a passion for creating software that improves the lives of our customers and hub operators
- You are interested in working in a truly collaborative environment where you'll work closely with product designers, data scientists, and stakeholders across our operations
- Strong proficiency in Python and Django for backend development
- Good working knowledge of Vue.js (or similar Javascript framework, e.g. React)
- In-depth knowledge of MariaDB and SQL
- RESTful API design and development
- Version control systems (e.g., Git) and CI/CD pipelines
- Web security best practices and performance optimization
- Server deployment and maintenance (e.g. nginx, cron, package managers)
- Strong debugging skills (e.g. PyCharm debugger, pdb, Sentry)
Desirable
- Experience building platforms for emerging markets
- Android development experience - our network of agents use our Android app to manage their batteries
- Knowledge of IoT or hardware integration
- Experience with distributed systems or offline-first architectures
- Background in energy, mobility, or fintech sectors
What the job involves
- This role is your chance to help build a mission-driven scale-up, backed by Octopus Energy, revolutionising access to clean energy and transport in Africa
- Joining our growing team, you'll be working to match our ambition to radically reimagine transport and energy in Africa through the development of the MOPO Platform - the digital backbone that powers our energy distribution network across the continent
- You'll be working across the full stack using Python/Django, Vue.js, and MariaDB to build and maintain the platform that manages our solar hubs, battery networks, and the thousands of customers we serve daily
- It's an exciting and varied challenge where your code directly impacts lives and livelihoods
- We're looking for a senior candidate to join our team to add capacity for our rapidly scaling platform and to help steer the direction of our technical architecture
- Work collaboratively across the company to continuously refine how our platform can create the greatest impact, scale efficiently, and operate reliably for our users
- Design, develop, and maintain features for the MOPO Platform that enhance functionality and user experience
- Optimise database performance and ensure efficient data storage and retrieval for our growing network
- Build intuitive and responsive web interfaces that work reliably in challenging connectivity environments
- Integrate third-party APIs and services to extend platform capabilities
- Conduct code reviews, mentor team members, and champion best practices
- Troubleshoot technical issues to ensure minimal disruption to our operations across four countries
- Participate actively in Agile processes, contributing to planning and refinement sessions
Application process
- Closing date for applications: 15th September 2025
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
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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