Senior Software Engineer, Backend (Merchant Interfaces)

Senior Software Engineer, Backend (Merchant Interfaces)

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.

The Partner Merchant Interface (PMI) team builds the APIs and solutions that power Assert's integrations with Enterprise Merchants and Partners. We create and manage the APIs and tools that drive checkout and merchant onboarding, and we collaborate with stakeholders to design and build custom end-to-end integrated solutions.

Responsibilities

With the support of your team's tech lead and manager, break larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery.

Support peers and stakeholders in the product development lifecycle by collaborating with product management, design, & analytics; participate in ideation, articulate technical constraints, and partner on decisions that properly consider risks and trade‑offs.

Contribute to the entire API lifecycle, including designing, developing, testing, maintaining, and evolving our APIs.

Support the operations and availability of your team's artifacts by creating and monitoring metrics, escalating when needed, and participating in on‑call efforts.

Contribute to a sense of community on the team by engaging in growth and development activities such as participation in the interview process.

What We Look For

5+ years of experience as a software engineer.

Proficiency in Python or Kotlin, with experience designing, developing, and launching backend systems.

Familiarity with distributed systems building blocks and technologies such as AWS, MySQL, and Kubernetes.

Ability to take a simple problem or business scenario into a solution that interacts with multiple software components, writing clear, well‑tested, and extensible code.

Comfort navigating a large code base, debugging others’ code, and providing constructive feedback through code reviews.

Proactive ownership of growth, seeking feedback from the team, manager, and stakeholders.

Strong verbal and written communication skills supporting effective collaboration with a global engineering team.

Bachelor's degree in a related field or equivalent practical experience.

Compensation

Pay Grade : N

Equity Grade : 6

CAN base pay range per year : $150,000 - $200,000

Work Location

Affirm is a remote‑first company. The majority of roles are remote, and you can work almost anywhere within the country of employment. Limited office‑based roles may require occasional onsite work.

Benefits

Health care coverage – Affirms covers all premiums for all levels of coverage for you and your dependents.

Flexible Spending Wallets – generous stipends for technology, food, lifestyle, and family forming expenses.

Time off – competitive vacation and holiday schedules allowing you to rest and recharge.

ESPP – Employee Stock Purchase Plan enabling you to buy shares of Affirms at a discount.

Equal Opportunity

We believe it’s on us to provide an inclusive interview experience for all, including people with disabilities. We provide reasonable accommodations to candidates in need of individualized support during the hiring process.

Additional Information

Seniority level : Mid‑Senior level

Employment type : Full‑time

Job function : Engineering and Information Technology

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