Senior Fullstack Engineer in Sheffield

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.

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

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.