Senior Embedded Engineer

Octopus Energy; Sheffield; On-site; GBP 50,000 - 70,000; Full time

Job summary

A mission-driven energy company is seeking a Senior Embedded Software Engineer to work in Sheffield. You will help revolutionize access to clean energy in Africa through firmware design for intelligent batteries. Ideal candidates should have excellent knowledge of C language and experience with hardware communication protocols. Join us to make a significant impact in a high-growth mission-driven scale-up.

Qualifications

• Excellent knowledge of C language.
• Knowledge of hardware communication protocols like SPI, UART, I2C, CAN.
• Experience with CI and/or unit testing for firmware.

Responsibilities

• Work collaboratively with disciplines to improve product impact.
• Test ideas and designs using 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

Tools

Logic analyzers

Scopes for debugging

Job description

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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 positionedto transform energy access and e-mobility across the continent