Software Engineer - Android Connected Devices

Software Engineer - Android Connected Devices

Remote Bay Area, CA, US

Posted Date: 12/08/25

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together.

So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage inventory, offer buy now, pay later functionality, book appointments, engage loyal buyers, and hire and pay staff. Across it all, we’ve embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow in one place.

Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth, enabling sellers to capture the next generation shopper, increase order sizes, and compete at a larger scale.

Today, we are a partner to sellers of all sizes – large, enterprise-scale businesses with complex operations, sellers just starting, as well as merchants who began selling with Square and have grown larger over time. As our sellers grow, so do our solutions. There is a massive opportunity in front of us. We’re building a significant, meaningful, and lasting business, and we are helping sellers worldwide do the same.

We believe everyone should be able to participate and thrive in the economy. So we’re building tools that make commerce easier and more accessible to all. We started with a little white credit card reader but haven’t stopped there. Our new reader helps our sellers accept chip cards and NFC payments, and our Cash app lets people pay each other back instantly.

We’re empowering the independent electrician to send invoices, setting up the favorite food truck with a delivery option, helping the ice cream shop pay its employees, and giving the burgeoning coffee chain capital for a second, third, and fourth location. Let’s shorten the distance between having an idea and making a living from it. We’re here to help sellers of all sizes start, run, and grow their business—and helping them grow their business is good business for everyone.

Connected Devices (CD)

CD owns the platform for connected devices here ’re one of the many essential teams that merchants depend on to help them run a remarkable business. They work on integrating our hardware products with our mobile apps: think Readers, Terminals, Registers, and Handheld.

As a member of CD, you’ll be working at the intersection of hardware, product, and platform solving hard technical problems. Your contributions will span from internal teams to our merchants and everything between -- creating memorable and seamless experiences for Square’s ecosystem.

• Build and improve the mobile experiences that power Square’s connected hardware products using Java and Kotlin
• Work across the full mobile stack, from networking to UI, to create smooth and reliable hardware integrations
• Develop systems that stay reliable and resilient so sellers can accept and report payments in any network or device conditions
• Partner closely with cross functional engineers to ship high quality features
• Work with product managers and designers to shape product scope and deliver clear, intuitive user experiences
• Use customer feedback to guide improvements and strengthen overall product quality
• Work directly on mobile and hardware integrations including BLE, USB, and similar technologies

• At least 8 years of relevant industry experience
• Strong experience building production mobile apps in Java and Kotlin
• A background in building reliable systems that perform consistently in a variety of environments
• A history of working closely with hardware, software, and product teams
• Hands on experience connecting mobile apps to hardware through BLE, USB, or related methods
• A customer first mindset and a comfort level solving complex problems across different parts of the ecosystem

We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace.…