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Senior Software Engineer, Backend; Partner Merchant Interface

Job in Kiryas Joel, Orange County, New York, USA
Listing for: Affirm
Full Time position
Listed on 2026-10-02
Job specializations:
  • Software Development
    Backend Developer, Software Engineer, Python
Salary/Wage Range or Industry Benchmark: 195000 - 255000 USD Yearly USD 195000.00 255000.00 YEAR
Job Description & How to Apply Below
Senior Software Engineer, Backend (Partner Merchant Interface)

Remote US

At affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.

What You'll Do
  • With the support of your team, you will work on tasks that contribute to the team's projects and goals.
  • You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work.
  • You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime.
  • You will contribute to a sense of community on your team by engaging in growth and development activities.
What We Look For
  • You have previous work or internship experience designing, developing and launching backend systems at scale and are experienced using one of Python or Kotlin.
  • You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes.
  • You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code.
  • You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.
  • Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.
  • You have strong verbal and written communication skills that support effective collaboration with our global engineering team.
  • This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Base Pay Grade - N

Equity Grade - 9

Employees new to affirm typically come in at the start of the pay range. affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.)

USA base pay range (CA, WA, NY, NJ, CT) per year: $195,000 - $255,000

USA base pay range (all other U.S. states) per year: $173,000 - $233,000

Remote-first with flexibility built in

affirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.

Benefits designed for you

Our benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights:

  • Health coverage at no cost:
    We cover 100% of premiums for employees and their dependents.
  • Spending stipends:
    Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you.
  • Time off to recharge:
    Flexible time off and generous holiday calendars help you rest when you need to.
  • Own a piece of what you build:
    Our employee stock purchase plan (ESPP) lets you buy affirm stock at a discount.

We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help.

For positions based in San Francisco or Los Angeles: affirm considers qualified applicants with arrest and conviction records, as…

Position Requirements
10+ Years work experience
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