Senior Fullstack Engineer

Octopus Energy

3800

Sheffield (GB), United Kingdom

Posted on: 2025-08-21

Category: energy

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Employment type:

Full time

Experience required:

Senior

Salary

Salary not provided

About the company:

We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.

That means making power greener, smarter, and more affordable for everyone.

We put customers at the heart of everything we do: with always-fair prices, transparency and outrageous customer service.

We drive system change: with transformative tech to make renewable energy the norm and end global reliance on fossil fuels.

Octopus Energy Group is made up of 10 businesses spanning 6 countries across 3 continents, including: Octopus Energy Retail, Kraken Technologies, Octopus Energy Generation, Kraken Flex, Octopus Electric Vehicles, and the Octopus Centre for Net Zero. More on OEG @ octopusenergy.group

We can't hire everyone… but we can help them shine somewhere brilliant.

At Octopus, we're lucky to attract some incredibly talented humans. And while we can’t bring every talented person into our team, we can help them land somewhere that’s just as mission-driven. That’s why we’re sharing opportunities from MOPO – a company we’ve proudly backed through a strategic investment.

MOPO is transforming access to clean, affordable energy across Sub-Saharan Africa with its pioneering solar battery technology. As part of our partnership to accelerate global electrification and leapfrog dirty fossil fuels, we’re supporting their hunt for exceptional talent. If you share our passion for tech-driven climate solutions, this could be your chance to make a serious impact.

If you’re motivated by purpose, adventure, and the chance to shape a high-impact business, MOPO offers the perfect opportunity. 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.

This is a hybrid role based in Sheffield with up to 2 days p/w from home if you would like.

Don't worry if you don't meet all of the above requirements. Send us a CV and we can have a chat.

Closing date for applications: 15th September 2025

More about MOPO:

MOPO is on a mission to enable renewable energy access in underserved markets. Already operating in Nigeria, DRC, Sierra Leone and Liberia, our solar power stations distribute energy through proprietary MOPO Batteries managed by a network of local agents.

Our model is already powering thousands of homes and small businesses - eliminating fossil fuel use and enabling livelihoods.

With backing from Octopus Energy, British International Investment, and Norfund, MOPO is scaling rapidly and is positioned to transform energy access and e-mobility across the continent

The role will interest you if...

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

On a given day you'll likely...

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

We would like to hear from you if you have the following experience...

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)

The following would be a strong plus

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

Octopus Energy

3800

Full time

Full time

Octopus Energy

3800

Full time

Energy