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.

Our hardware team builds the tangible connection to all that is Square. As we introduce more and more of our products to the world, our hardware footprint expands. In this role, you will be responsible for developing the embedded software in Square’s hardware products.

You will:

• Develop the embedded software in Square’s hardware products

• Write great code within the constraints of both tiny embedded systems and much more powerful platforms

• Move up the stack to write and collaborate on system-side code; including protocol design and signal processing in iOS and Android applications, as well as kernel and other development on Linux/Android platforms

You have:

• Firmware / Embedded software development experience

• Expertise in C software development, tools, and debugging

• A strong software development discipline, including modularization and test methods

• Understanding of common communications protocols (e.g. SPI, UART, I2C, USB), debugging practices (e.g. JTAG and associated gdb integrations), and basic electrical design principles

• BS in CS, CE, EE, or equivalent practical experience

Even better:

• Experience with ultra-low-power systems, including power + thermal management

• Experience with 8-bit to 32-bit RISC and ARM processor

• Experience with real-time operating systems

• Experience shipping consumer electronics products

• Experience in iOS or Android application development

• Experience debugging  issues cross functionally, using a combination of software and lab equipment such as oscilloscopes and protocol analyzers

• Experience with basic cryptography concepts and/or hardware security concepts

• Experience in developing device drivers and userspace software on Linux/Android platforms

At Square, our purpose is to empower – within and outside of our walls. In order to build the best tools for the businesses and customers we support all over the world, we have to start at home with a workforce as diverse and empowered as our sellers. To this end, we take great care to evaluate all employees and job applicants equally, based on merit, competence, and qualifications. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or any other characteristic protected by law. We encourage candidates from all backgrounds to apply and always consider qualified applicants with arrest and conviction records, in accordance with the San Francisco Fair Chance Ordinance. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at)squareup.com. We will treat your request as confidentially as possible. In your email, please include your name and preferred method of contact, and we will respond as soon as possible.