Software Engineer (Data Platform) in London

Are you passionate about fighting climate change? Do you want to work on creating a world where everyone can breathe clean air? Do you want to have an opportunity to shape a growing company?

At Breathe, we believe an electrified future is key to achieving this, which is why we are building battery technology to help brands do more with the power they have. Our physics-based battery management software helps some of the world's largest and most iconic automotive and consumer electronics brands deliver products with faster charging, longer life and zero compromise on safety. Put simply, we make batteries better. And we want you to join us.

You will join a talented and cohesive team who everyday go to work to do more with the power we have. Why? Because we dream of a world where everyone can breathe clean air. You will have the opportunity to have a big say in how the company is run and where we are going. You will become an agent of change and help us push the industry forward by helping make the complex simple and in return you have an opportunity to grow your career with us as we scale.

We’re genuine people who want to do good and are driven by passion, coffee and a mutual love of dogs – and yes, our office in London is dog friendly and we would love to add more dogs to our pack.

We know it isn’t always 9-5, but we do know that family and a good work-life balance are key to innovation, so we offer flexible/hybrid working to try to accommodate your needs. Not based in London? Don’t worry, let’s chat.

We believe in keeping energy levels high and we have a constant supply of office snacks to help you with that. We offer share options, an ethical pension scheme and we know downtime is key to keeping the mind sharp, so we offer 34 days holiday per annum inclusive of Bank Holidays that we want you to take.

As well as the ability to learn from and with a room full of experts working at the cutting edge of the industry, we will provide the support and training to develop your skills, be that via courses, conferences or other learning opportunities/materials.

We've built our internal data and R&D platform, and now we want to do far more with it — integrating AI and modern data science to turn the battery data we collect every day into faster insight and better products. That's where you come in. We're looking for a versatile software engineer who's happy ranging across the stack — building data pipelines and APIs, automating workflows, working with databases and cloud infrastructure, and applying AI to extract more value from our data. You'll join our Platform & AI team and play a central role in a platform that underpins all of our R&D, product development, and service delivery.

You'll have genuine ownership here and you'll help shape how our data platform grows and how it connects to the rest of Breathe's systems.

Your day to day:

• Design and develop data pipelines that continuously collect and process time-series and metadata from battery test hardware, securely transferring and storing it in a central database.
• Build solutions that give our battery, solutions, and modelling teams easy access to data for analysis and customer projects.
• Automate data analysis, applying AI to increase the insight we generate.
• Design solutions that detect data errors early — whether human or system — so issues get flagged and resolved quickly.
• Help own the development of our database solution, keeping it reliable, maintainable, secure, and robust.
• Take projects from planning through implementation, testing, and verification across the software stack.
• Write high-quality, testable code, including unit and integration tests.
• Help plan how we scale the data platform and integrate it with other Breathe systems.
• Collaborate across teams to define requirements, solve problems, and establish best practices.

Your background:

• Strong software engineering fundamentals and a generalist mindset — comfortable working across pipelines, APIs, databases, and infrastructure.
• Solid experience with Python, and with API frameworks such as FastAPI, Flask, or Django.
• Experience using and architecting databases (e.g. PostgreSQL, MySQL).
• Experience with DevOps/platform engineering and CI/CD (e.g. GitLab CI).
• Experience with cloud and on-prem infrastructure (networking and resources in Azure, on-prem networking).
• Experience building data analysis pipelines handling time-series and metadata.
• Familiarity with Databricks or other modern data platforms.
• A proactive approach to identifying and solving technical and process challenges.
• Ability to work cross-functionally in a kind and conscientious manner.
• Adaptability in an innovative and rapidly scaling environment.

We want to add the best talent to our incredible team, and we want to find you tomorrow. We will do our best to process your application as quickly as possible and come back to you within 2 weeks as we appreciate communication is key. But we aren’t perfect so do reach out to us for an update.

At Breathe, we believe that having diverse perspectives within our team is an essential part of innovating quickly, thinking from first principles, and expanding our expertise. Ultimately, enabling us to deliver better products to our customers. We aim to attract, nurture, and retain diverse individuals. Because that’s how we do our best work. And because that’s the kind of world we want to live in. We welcome and encourage applications from all qualified candidates and are happy to provide the accommodations you need within our recruitment process to enable you to demonstrate your skills. Just let us know what you need.

So, what are you waiting for? Come join us!