Square Hardware- Senior Embedded Engineer

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.
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. This role will report to the firmware engineering manager for our Connected Hardware products.
You will:

• Build a common firmware platform for all of Square's hardware products
• Write code within the constraints of tiny embedded systems
• Own firmware driving NFC and contactless payment subsystems
• Move up the stack to write and collaborate on system-side code; including protocol design
• Develop tests to validate product features, drivers, and system functionality
• Build reliable tools to support firmware development and product debugging
• Collaborate with manufacturing, electrical engineering, and release teams

Qualifications
You have:

• 5+ years of relevant industry experience
• Experience developing and debugging wireless connectivity solutions in embedded systems, using technology such as NFC, RFID, Bluetooth Classic, BLE, or Wi-Fi
• A software development discipline, including modularization, documentation, and test methods
• Firmware / Embedded software development experience
• Experience leading large multi-person projects, from design, implementation, deployment and monitoring phases
• Expertise in C software development, tools, and debugging
• Understanding of common communications protocols (e.g. SPI, UART, I2C, USB), debugging practices (e.g. JTAG and associated GDB integrations), and electrical design principles
• BS in CS, CE, EE, or equivalent practical experience
• Experience with real-time operating systems
• Experience shipping consumer electronics products
• Experience debugging issues cross functionally, using a combination of software and lab equipment such as oscilloscopes and protocol analyzers

Even better if you have experience in any of the following:

• Experience developing wireless communication solutions using NFC or RFID
• Experience developing contactless payment solutions
• Experience using Python (or similar scripting languages) in automated testing, build systems, or device firmware communication

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. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page .
Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.
To find a location's zone designation, please refer to this resource . If a location of interest is not listed, please speak with a recruiter for additional information.
Zone A:
$217,800 - $326,800 USD
Zone B:
$207,000 - $310,400 USD
Zone C:
$196,100 - $294,100 USD
Zone D:
$185,200 - $277,800 USD
Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.