Senior Staff Software Engineer, Backend (Checkout Engineering)

Affirm; Boise (ID); Remote; USD 232,000 - 282,000; Full time

Job summary

An established industry player is seeking a Senior Staff Software Engineer to drive technical innovation in their Checkout engineering team. This role involves collaborating with cross-functional teams to build scalable solutions and mentor engineers while shaping best practices. With a focus on delivering honest financial products, the company offers a transparent pay structure and competitive benefits, including full health coverage and flexible spending options. Join a remote-first environment where your expertise will directly impact customer experience and product development.

Benefits

100% subsidized medical coverage

Flexible Spending Wallets

Competitive vacation and holiday schedules

Employee stock purchase plan (ESPP)

Qualifications

• 12+ years of relevant Software Engineering experience required.
• Experience in Kotlin or Python preferred for backend development.

Responsibilities

• Define multi-year technical strategy and lead implementation.
• Architect and build next-generation Purchasing services.

Skills

Software Engineering

Kotlin

Python

Cross-functional collaboration

Technical leadership

Communication skills

Education

Bachelor's degree in a related field

Job description

Join to apply for the Senior Staff Software Engineer, Backend (Checkout Engineering) role at Affirm

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Join to apply for the Senior Staff Software Engineer, Backend (Checkout Engineering) role at Affirm

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.

Affirm is looking for a Senior Staff Software Engineer to take on a key role in defining the technical direction and foster innovation across the Checkout engineering organization. You’ll collaborate with engineering leaders, cross-functional teams, and stakeholders to build scalable, reliable, and high-performing solutions. You'll help shape best practices, guide architectural choices, and drive the successful delivery of critical initiatives. This role requires a high level of technical ability, leadership skills, strong cross-functional communication, and a creative mindset.

Checkout is responsible for shaping customer experience across the journey from first touch to finalizing a purchase. In this role, you will need to gain a deep understanding of the business, product, and engineering context, and utilize that context to define the requirements, vision, and roadmap of the Checkout area. You will lead the team to influence and align with business stakeholders and engineering partners, and deliver the vision over multiple years in incremental milestones.

What You'll Do

• Define the multi-year, multi-team technical strategy and deliver it through direct implementation and broad technical leadership
• Architect and build next-generation Purchasing services, ensuring high availability and low latency to support Affirm’s financial products.
• Influence and align with cross-functional leaders across the organization, guided by deep domain context and engineering expertise
• Mentor engineers and advocate for engineering excellence, influencing best practices across teams
• Navigate ambiguity, bringing clarity to complex engineering, product, and business discussions
  
  

What We Look For

• 12+ years relevant Software Engineering experience
• Kotlin development experience is a plus, Python or Kotlin expertise preferred
• Proven experience delivering multi-year, high-impact projects with broad cross-functional collaboration
• Passionate about Affirm's Mission: "Deliver Honest Financial Products that improve lives"
• Enjoys cross team collaboration especially with product managers and designers
• Cares about the details in the user experience
• Excellent written and verbal communication, especially in asynchronous formats (RFCs, design docs, project plans)
• This position requires either equivalent practical experience or a Bachelor’s degree in a related field.
  
  

Base Pay Grade - R

Equity Grade - 15

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: $260,000 - $310,000

USA base pay range (all other U.S. states) per year: $232,000 - $282,000

Affirm is proud to be a remote-first company! The majority of our roles are remote and you can work almost anywhere within the country of employment. Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office. A limited number of roles remain office-based due to the nature of their job responsibilities.

Benefits

We’re extremely proud to offer competitive benefits that are anchored to our core value of people come first. Some key highlights of our benefits package include:

• Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
• Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
• Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
• ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount
  
  

We believe It’s On Us to provide an inclusive interview experience for all, including people with disabilities. We are happy to provide reasonable accommodations to candidates in need of individualized support during the hiring process.

[For U.S. positions that could be performed in Los Angeles or San Francisco] Pursuant to the San Francisco Fair Chance Ordinance and Los Angeles Fair Chance Initiative for Hiring Ordinance, Affirm will consider for employment qualified applicants with arrest and conviction records.

By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and hereby freely and unambiguously give informed consent to the collection, processing, use, and storage of your personal information as described therein.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

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