Senior Software Developer in Test

  • San Francisco, CA
  • Full-time

Company Description

We believe the economy is better when everyone has access. When everyone has room to grow. No one should be left out because the cost is too great or the technology too complex. We started with a little white credit card reader but haven’t stopped there. 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. 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.

Job Description

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. 

As the Sr. Test Automation Engineer, you will be responsible for planning and executing integrated system testing with an emphasis on hardware-centric software risks for new and existing payment device projects. This includes cross-functional work with developers, QA Engineers, and product managers, to identify risk areas, testing responses and ensure total quality.

You should have an engineering background consisting of software development, low-level test automation systems design and development, and automating existing manual testing. You have a strong aptitude for learning new technologies with a good instinct for discovering defects in firmware, software, and hardware. You are a strong communicator, focused, responsible, and a team-player who thrives under pressure.


 You will:

  • Analyze and decompose a complicated embedded software system, design and implement a comprehensive approach to testing this system

  • Create, modify, and execute tests for validation of Square’s hardware and firmware features, focusing on the firmware level (including various payment cards interoperability, and integration testing with the rest of the Square ecosystem)

  • Negotiate test APIs and firmware hooks that remove friction from adding new tests, while maintaining the security that our merchants need to trust their business to Square

  • Partner with developers to build more test coverage into their own development chain

  • Work directly with developer teams to understand the strengths and limitations of their current CI systems and create a QA test strategy that complements those

  • Build partnerships with product owners and stakeholders  to ensure that the entire customer experience is covered efficiently

  • Champion good test and quality practices throughout the product lifecycle

  • Be a vocal proponent for quality (internally and externally) in every phase of the development process

You have:

  • 7+ years of test development and/or software engineering experience, preferably on consumer-facing hardware/software products

  • BS/MS EE/CS or technical degree with relevant experience

  • Experience creating comprehensive custom test automation frameworks from scratch

  • A broad tool box and a proven ability to pick the right one for the job

  • Natural instinct to look at products as our customers will

  • Knowledge of continuous integration systems

  • Good understanding of SQA methodologies & practices

  • Experience shipping embedded and mobile devices

  • Mix of big company and small company experience

Even Better:

  • Experience testing Bluetooth or Wi-Fi

  • Experience testing smart payment systems

  • Experience in developing automation where off-the-shelf tools do not exist, using scripting or other languages (C/C++, Perl, Python, Ruby, JavaScript, Objective-C, etc.)


Additional Information

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) 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.