Senior Software Engineer - Backend

San Francisco or Remote /
Engineering - Backend /
Build the world's fastest Identity and Checkout products

Company Mission

Our mission is to make buying online faster, safer and easier for everyone. Fast Login and Fast Checkout enable a one-click sign-in and purchasing experience that makes it easier for people to buy and merchants to sell. The company’s products work on any browser, device or platform to deliver a consistent, stress-free purchasing experience. Fast is entirely consumer-focused and invests heavily in its users’ privacy and data security. Headquartered in San Francisco but open to a globally remote workforce, we are a founders-led, privately held company funded by Stripe, Index Ventures, Susa Ventures and other world-class investors.

We are committed to diversity and inclusion, and demonstrate our values through equitable pay, fantastic benefits, and access to all reasonable accommodations. 


We are looking for a backend senior engineer that has worked on software and tech solutions at scale to join our team. Come join an engineering team that is shaping a new, frictionless online purchasing experience, where you will have a voice in the architecture that will propel us forward.


    • Develop across the stack with a focus on backend utilizing Go (Golang)
    • Build solutions that take into consideration issues of scaling and growth
    • Create code that is robust for long term expansion and use
    • Collaborate with product, design and the broader engineering team on features and functionality
    • Evaluate product launch related use cases from a technical perspective
    • Join in system design conversations with partners in product and engineering to build solutions for our services
    • Participate in team meetings covering release and build roadmaps and be an active voice in the discussion


    • CS degree or related field, or equivalent experience
    • 5+ years of experience as a fullstack software engineer
    • 2+ years of experience utilizing Go in a professional environment
    • Familiarity with languages commonly utilized to create solutions at scale (Java, Python, Scala, JavaScript, etc)


    • Experience with building applicants that have millions of concurrent users
    • Experience with distributed systems and/or microservices
    • Familiarity with Kubernetes
    • Experience with JavaScript

Benefits and Perks- Because People Matter

Comprehensive insurance (paid 99% by the company) with no deductible, and 10 dollar copays
Globally remote with flexible work schedules to fit your needs
Generous paid parental/family leave for all caregivers- up to 12 weeks
401k with match up to 4%
Equity grant with possibility of refresher
People-focused PTO that you determine- time off is there when you want it, when you need it
Frequent inclusive events scheduled to allow everyone to express their voice (or dance skills)
Monthly exercise and internet stipends---and snacks