Senior Software Engineer - Device OS in London

We're reinventing payments. In less than four years, Dojo disrupted the market to become the largest and most loved acquirer in the UK. Our payments infrastructure, purpose-built for in-person commerce, is game changing. Now, over 150,000 customers across four countries choose to transact billions with us every year. But we're just getting started. Our people are the driving force behind our success. They are our greatest investment and our ultimate competitive advantage. We hire exceptional people and give them the autonomy, trust, and ownership to thrive. The results take care of themselves.

The Role: Our cloud-native acquiring platform is the resilient backbone of Dojo, but our ambition extends far beyond just processing transactions. We are building a differentiated device ecosystem, and at the very heart of this strategy is the Dojo Device OS team. This is the true intersection of our hardware and software, the platform that will transform our devices from simple payment terminals into an ecosystem of apps for our partners and customers.

As a Senior Software Engineer on this team, you will be a key technical leader, responsible for producing high-quality software and solving our most complex challenges on the Android platform. We are looking for a product‐focused engineer who takes deep ownership of their work and leads by example through excellent craftsmanship. You will have the unique opportunity to tackle challenging performance problems, ensuring our on‐device software is fast, fluid, and reliable. If you are a passionate Android engineer who thrives on technical complexity and wants to set a high bar for excellence, this is the role for you.

What you will do:

• Own the end‐to‐end development of complex features for our on‐device software platform, from technical design through to implementation and release.
• Tackle challenging performance optimisation problems, ensuring our Launcher and on‐device services are fast, fluid, and efficient.
• Write and review high‐quality Kotlin code, setting a high bar for technical excellence, craftsmanship, and testing within the team.
• Mentor and support other engineers, sharing your expertise in Android best practices and helping to elevate the team's technical capabilities.
• Collaborate closely with product managers, designers, and other engineering teams to solve complex problems at the intersection of hardware and software.

What you will bring:

• Strong knowledge of Kotlin and the Android Framework, with a proven track record of building and shipping high‐quality, production‐grade applications and experience using modern libraries like Jetpack Compose.
• A product‐focused mindset, with a passion for understanding user problems and making data‐informed decisions.
• Experience in Android performance analysis and optimisation.
• Deep experience using Coroutines, dependency injection, and modern architectural patterns (MVVM, Clean Architecture).
• A strong sense of ownership and pride in your work, with a commitment to high‐quality software and supporting the growth of your teammates.
• An interest in or curiosity about low‐level Android libraries, SDK development, or AOSP is a plus.

Dojo home and away: We believe our best work happens when we collaborate in‐person. These "together days" foster communication, drive innovation and spark our brightest ideas. That's why we have an office‐first culture. This means working from the office 4+ days per week. With offices across Europe, we know a thing or two about staying dynamic. Need deep focus? Head to a quiet zone. Big ideas? Collaboration spaces have you covered. Just here for a catch‐up? Our social hubs make it easy. Do work that counts, in spaces made for you.

Question: what's curious, relentless, and customer obsessed? If you're keen to know the answer, you're a third of the way to meeting our Dojo values. If the following speak to you, let's talk:

• You're curious. You have a real desire to learn and create.
• You're relentless. You keep going even when it's easier not to.
• You're customer‐obsessed. You know how important customers are to what you do.

Diversity, equity, and inclusion at Dojo: From local bakeries to well‐known eateries, Dojo payments serve over 150,000 places across the UK. And something that's fundamental to creating relevant, innovative products at Dojo is to build teams to reflect the diversity of the businesses we serve. Our drive to improve diversity, equity, and inclusion is closely linked to helping employees thrive and innovating for better customer experiences. If you care about your work, you're curious, and you think customer‐first, you have a place at Dojo. To make sure you're the best you can be throughout the recruitment process, let us know if you need any extra adjustments to help you thrive. Visit dojo.careers to find out more about our benefits and what it's like to work at Dojo, or check out our LinkedIn and Instagram pages.