Circle is a global crypto finance company, built on blockchain technology, powered by crypto assets, and dedicated to helping people and institutions create and share value globally. With our suite of products, we enable our customers to send and receive money around the world easily, as well as invest in and trade crypto assets.

Our passion is building crypto finance apps that will fundamentally change the way businesses and consumers use money. As a Senior API Developer at Circle, you'll own entire features from concept to deployment. That means you'll have the freedom to help shape our products - from initial specs to API development (in node.js) There are plenty of opportunities for personal growth and leadership.

As part of the product engineering team, you’ll create and iterate upon product features that will shape the future of Circle’s product. We're looking for highly motivated individuals who seek a fun, collaborative, iterative and fast-paced environment.

• Collaborate with other teams to help craft elegant solutions to problems
• Develop features primarily on the backend working with Node.js and SQL while exploring other modern web technologies
• Ensure code is well tested through unit and integration tests
• Take the lead in developing product features from initial specs and API development, to the public release and announcement
• Design and implement the APIs that Circle’s iOS, Android and Web clients run on
• Leverage new technologies in innovative ways

What you'll bring to Circle:

• Experience building single page web applications using modern web technology (Node.js/RoR/Flask)
• Passion for writing beautiful, functional and well-tested code
• Experience with REST APIs and SQL databases
• Open-source project contributions
• Passion for writing beautiful, functional and well-tested code

Circle was founded in 2013 by internet entrepreneurs Jeremy Allaire and Sean Neville. We’re backed by $250 million from investors including Jim Breyer (Facebook), Goldman Sachs, IDG Capital (Baidu, Tencent), General Catalyst (AirBnB, Snapchat), Accel Partners, and Bitmain, with offices in Boston, New York, San Francisco, Dublin, London and Hong Kong.

Circle Pay enables customers to send and receive money, across borders and currencies. Circle Invest empowers consumers to buy and sell crypto assets. Circle Trade is one of the world’s top market makers for major crypto coins and offers OTC trading services for institutions and high net worth individuals. Additionally, in 2018 Circle acquired Poloniex and signed an agreement to acquire SeedInvest, both of which enable us to expand our offerings even further. Poloniex is one of the world's leading token marketplaces. SeedInvest is the largest equity crowdfunding platform in the United States, as well as a licensed broker-dealer.

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