Senior Software Engineer, Android Payment SDKs

Company Description
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 through Afterpay, 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.
Job Description
Our Payment SDK teams serve both third-party developers who create their own applications using Square's ecosystem, and also our own developers creating Square's own applications. Our external customers include some of Square's largest, and internally we collaborate with unusually many other teams, from device firmware to server APIs and services, from low-level security and account identity to developer support and sales engineering. In some ways our focus is narrow-we move money for in-person transactions, and do only the bare minimum of other functions required for that-but is, in a very real sense, the heart of Square.
You Will:

• Design and implement features to expand the Android SDK products' addressable market to new developers, merchants, and buyers.
• Help balance the external-facing and internal-facing demands, including designing APIs and systems that meet the sometimes-competing needs of both.
• Collaborate with some truly excellent teammates, both in the SDK team and adjacent to it, and help to onboard new engineers and develop the existing ones to remain excellent and to further improve both your peers and yourself.

Qualifications
You Have:

• At least eight years' experience as a software engineer, including at least several years' experience working in Kotlin on Android in a professional environment. To us, "professional" means working in a group on something larger than your own efforts, using normal tooling such as IDE development, revision control, unit and UI testing including continuous integration systems, and gathering analytics data and troubleshooting of field issues.
• Experience not only implementing significant projects, but in resolving ambiguous and competing goals, identifying requirements, and designing and decomposing a tractable solution to those needs.
• Experience in refactoring a complex code base, maintaining it and adapting to both changing circumstances and to correct past errors and misjudgements.
• Experience mentoring both junior and peer teammates, as well as receiving and learning from both peer and senior colleagues and management.
• It's a plus if you have developed Android SDKs as opposed to only applications.
• It's similarly a plus if you've previously worked with payments, in finance, or in some other highly-regulated field or context. If not, no worries, you'll learn. A lot.
• It's a plus if you've had end-to-end ownership of something, and particularly ownership of build and release stages as well as feature layers.
• It's a plus if your prior work included client/server communications and dependency injection. Again, we can teach you, but it's a nice-to-have.

Technologies We Use and Teach:

• Kotlin
• Android APIs
• Patterns and models both for Android apps, in which we have control of the whole thing, and for SDKs, in which our developer customers can do unexpected and uncontrolled things.
• Common Android tools and libraries, such as Dagger dependency injection, OkHttp and Retrofit communications, Google protocol buffers. Also some uncommon ones Square releases, such as Workflows.
• Finance and Payment regulations, both in the US and in countries where Square operates. These include PCI, SPoC, and MPoC standards and requirements, for example.
• Testing frameworks and methodologies at a variety of levels, from simple unit tests to UI tests and nearly full-stack integration tests to humble manual testing.

Additional Information
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.
Zone A: USD $163,600 - USD $245,400
Zone B: USD $155,400 - USD $233,200
Zone C: USD $147,300 - USD $220,900
Zone D: USD $139,000 - USD $208,600
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.
Full-time employee benefits include the following:

• Healthcare coverage (Medical, Vision and Dental insurance)
• Health Savings Account and Flexible Spending Account
• Retirement Plans including company match
• Employee Stock Purchase Program
• Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance
• Paid parental and caregiving leave
• Paid time off (including 12 paid holidays)
• Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees)
• Learning and Development resources
• Paid Life insurance, AD&D, and disability benefits

These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans.
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 a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class.
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 will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. Because the material duties of this role involve direct or indirect access to sensitive personal or financial data, a criminal background check is required following a contingent offer of employment.
While there is no specific deadline to apply for this role, on average, U.S. open roles are posted for 70 days before being filled by a successful candidate.
Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.