About Us:

Finix is the smartest way for businesses to own, manage, and monetize payments. Built by payments experts from Klarna, PayPal, and Worldpay, Finix is trusted by companies like Lightspeed POS Inc., Passport, and Clubessential to build and scale their payments infrastructure. Headquartered in San Francisco, Finix is a privately held company funded by American Express Ventures, Bain Capital Ventures, Homebrew, Inspired Capital, Lightspeed Venture Partners, Sequoia Capital, Visa, and others. To learn more, visit www.finixpayments.com.

The API Designer is the standard bearer for APIs at Finix and will propel Finix’s mission of enabling software companies to become payment companies. They will marry their knowledge of Finix’s business, developer needs, and principles of API design to create a modern, inviting, and comprehensible API. The API design should make payments accessible to developers and help them accomplish their integrations accurately and efficiently. The API designer will contribute to best-in-class documentation, tutorials, code libraries, and sample code. They will build or buy tools to allow product managers and developers to create standards compliant APIs. They will also help modernize existing APIs to meet needs.

What You’ll Be Doing:

• Take primary responsibility for designing new APIs and upgrading existing APIs to be compliant with standards
• Work with UI product managers to define APIs that are used specifically to power the UI; also work with the reporting product manager to create a standard API design pattern for reporting
• Collaborate with functional product managers and integration engineers to understand payments use cases
• Ensure compliance of APIs to the OpenAPI specification and standards
• Write tests to ensure compliance with OpenAPI specifications
• Create and maintain demo scripts to train Support and Sales Engineering
• Assist Sales Engineering in answering in-depth technical questions about using the API
• Take responsibility for the accuracy and completeness of all developer documentation; work with technical writing on the same. API references (not guides) 
• Manage the process of updating APIs ensuring that they don’t break existing customer implementations
• Liaise between PMs and Engineering Leads and align vision on API. Do API design component and have strong project and people skills to ensure this all gets stitched together
• Evolve the APIs to create multiple self-contained product modules that can be used by the customer independently or together

About You:

• You have experience designing and building APIs in other companies which have seen a lot of scale
• You have the ability to write small amounts of code to test APIs
• Strong written, verbal, and presentation skills which help you talk to business and technical customers
• You love to build and ship products
• You understand not only today’s use cases but also future use cases for the API; you are able to design APIs that have “runway” i.e. evolve naturally to accommodate future use cases
• Beyond just shipping new products, you obsess about continuous product improvement
• You do whatever it takes to make your product and team successful, no matter how big or small the issue may be
• You can turn incomplete, conflicting, or ambiguous inputs into solid action plans

Even Better If You Have:

• 5+ years experience in a product role in a company that makes mission-critical infrastructure (think AWS for e.g.)
• 2+ years experience in an engineering role
• Experience managing technical software products from kick-off to ship
• Degree in a technical or quantitative field (e.g., Computer Science, Economics, Statistics, Sciences, Engineering)
• Financial products experience

Your application should include:

• Your resume or LinkedIn profile
• A few words about why Finix is interesting to you

Note: a take-home design exercise will be a component in the interview process.

Finix is an equal opportunity employer and values diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Applicants Only: External recruiting agency resume submissions will not be accepted.