Software Engineer, Python, Full Stack Developer

IONETIC – who are we?

IONETIC is a battery technology start-up based in Brackley, just a few miles from Silverstone—the heart of British motor sport. We specialise in battery pack solutions for low-volume electrified applications, including buses, sports cars, and other vehicles. Our mission is to make electrification both possible and compelling for every vehicle OEM, by providing tailored, cost-effective battery packs with unmatched speed and flexibility.

By integrating proprietary software, mechanical design, and manufacturing technologies into a single technology stack we call Arc, we deliver custom battery systems that meet a wide range of energy, power, and lifecycle requirements. Our chemistry-agnostic, scalable designs are built to accelerate the journey to net zero for our customers.

IONETIC offers an exciting opportunity to be part of a fast-moving, innovative start-up that is shaping the future of electric mobility. With a strong order pipeline and growing demand for our technology, we're expanding our team to broaden our capabilities and scale our operations.

As an early-stage employee, you will play a key role in developing the foundational technologies and capabilities that will power the next generation of electric vehicles. Every employee at IONETIC takes on meaningful responsibility and is encouraged to contribute ideas, take initiative, and grow both professionally and personally in a supportive, collaborative environment.

We are looking for a Software Engineer to build, deploy, and maintain IONETIC's internal software toolchain. In this role, you will design and develop software that supports engineering activities across the business, working closely with the engineering team to turn technical requirements into working software.

You will work across the stack as needed, contributing to tooling, deployment, and data management practices that keep the toolchain reliable and scalable.

• Design and build software across IONETIC's internal toolchain
• Deploy and maintain software and supporting infrastructure
• Manage and structure data used across the toolchain
• Write clean, maintainable, well-documented code
• Work across the stack as needed, including tooling in Python, Type Script, and C#
• Collaborate with engineers to translate technical requirements into working software
• Contribute to decisions on software architecture and design

• Degree in Computer Science, Software Engineering, or a closely related discipline, or equivalent experience
• Solid Python skills, with exposure to Type Script and/or C# a plus
• Understanding of software architecture and design principles
• Experience deploying and maintaining software in production
• Awareness of data management practices, including structure, storage, and integrity
• Experience working on non-trivial software projects, ideally in a team setting
• Strong analytical and problem-solving skills