Senior Embedded Engineer

Octopus Energy Group; Sheffield; On-site; GBP 45,000 - 65,000; Full time

Job summary

A clean energy company is seeking an experienced Embedded Software Engineer to join their Sheffield-based team. This role involves designing firmware for intelligent batteries and working across various disciplines to enhance energy access in Africa. Applicants should have excellent knowledge of C language and hardware protocols. A strong background in debugging and Git version control is also required. Join a mission-driven team to make a significant impact in renewable energy.

Qualifications

• Excellent knowledge of C language.
• Knowledge of hardware communication protocols: SPI, UART, I2C, CAN.
• Experience with Git version control system.
• Strong debugging skills.
• Knowledge of network protocols such as TCP, UDP, TLS, HTTP is a plus.

Responsibilities

• Work collaboratively with other disciplines to refine product understanding.
• Test ideas and designs by building simulations and validation tests.
• Design and test firmware for intelligent batteries.

Skills

C language

Hardware communication protocols (SPI, UART, I2C, CAN)

CI and/or unit testing for firmware

Git version control system

Strong debugging skills

Use of logic analyzers, scopes

Job description

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 existing Sheffield-based team, you will be working with other Embedded Software Engineers to match our ambition to radically reimagine transport and energy in Africa.

You’ll be working across a range of disciplines to bring our solutions for energy access to market, including the replacement of petrol generators with swappable batteries and replacing petrol motorbikes with our own electric motorbikes, using the same battery swap system. It’s an exciting and varied challenge.

We’re looking for a senior candidate to join our team to add capacity for our existing projects and to help steer the direction of our product development.

The role will interest you if...

• You’re excited by the prospect of transforming the off-grid energy and e-mobility market in Africa
• You have a passion for improving the lives of the customers who use ourproducts
• You are interested in working in a truly full-stack team
• You will be workingclosely with hardware engineers, product designers and other stakeholders atour tech hub in Sheffield

On a given day you'll likely...

• Work collaboratively with other disciplines across the company to continuously refine and improve our understanding of how our products can create the greatest impact, get to market quickly, and operate reliably for our customers
• Test ideas and designs: back-of-the envelope calculations, building simulations and designing validation tests
• Design and test firmware that runs in our intelligent batteries: BMS controls, system-level behaviours and optimisation, system diagnostics and updates, RF communication protocols and control algorithms

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

• Excellent knowledge of C language
• Knowledge of hardware communication protocols: SPI, UART, I2C, CAN
• CI and/or unit testing for firmware
• Experience with Git version control system
• Strong debugging skills
• Use of logic analysers, scopes etc. to debug communications or firmware issues

The following would be a strong plus

• Knowledge of network protocols, such as TCP, UDP, TLS, HTTP
• Knowledge of Bluetooth LE, GAP, GATT
• Familiar with low-level aspects of RTOS
• Custom bootloaders

Closing date for applications: 10th August 2025 12pm.

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