Software Engineer II, Fullstack (Ads Platform)

Affirm; St. Louis (MO); Remote; USD 146,000 - 206,000; Full time

Benefits offered by this job

Health coverage for you and dependents

Monthly tech stipends

Time off and holiday calendars

ESPP

Job summary

Affirm is a remote-first company with US-based pay ranges. We seek a software engineer with 1.5+ years of experience who can ship web apps using React and design APIs at scale with Python or Kotlin. You’ll own features end-to-end, review peers, and contribute to a collaborative, globally distributed engineering team.

The role emphasizes growth, on-call support, and a strong ownership mindset, with competitive base pay and equity opportunities.

Qualifications

• 1.5+ years of software engineering experience.
• Experience shipping web apps with declarative UI frameworks like React.
• Experience designing, developing and launching APIs at scale using Python or Kotlin.
• Demonstrated ability to own problems end-to-end and deliver well-tested, extensible code.
• Comfort navigating large code bases, reviewing others' code and giving constructive feedback.
• Proactive about personal growth, seeking feedback from team and stakeholders.
• Strong verbal and written communication for global teams.
• Bachelor’s degree or equivalent practical experience in a related field.

Responsibilities

• Break down larger projects into tasks and deliver in phases with the team lead.
• Collaborate with product, design, and analytics across the lifecycle and discuss constraints and trade-offs.
• Support operations and availability of team artifacts; monitor metrics and participate in on-call efforts.
• Contribute to team growth through participation in the interview process.

Skills

React

API design

Python

Kotlin

Code reviews

Ownership

Communication

Education

Bachelor's degree or equivalent

Tools

Git

Job description

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. Our Marketplace is continually evolving to deliver a deeply personalized shopping experience that seamlessly links consumers with merchant partners. By leveraging machine learning alongside rich consumer and merchant data, we aim to simplify and streamline the customer journey around everyday and major purchases with tailored brands, products, deals, and offers. In tandem, we are advancing our Ads Platform which is a key technology that empowers merchant partners to strategically deploy their budgets and reach targeted consumers for maximum incremental impact.

What You'll Do

• With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work.
• You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.
• You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.
• You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process.

What We Look For

• You have a total of 1.5+ years of experience as a software engineer.
• You have experience shipping web apps using declarative UI frameworks like React.
• You have experience designing, developing and launching APIs at scale using languages like Python or Kotlin.
• 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 - L

Equity Grade - 6

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: $165,000 - $225,000

USA base pay range (all other U.S. states) per year: $146,000 - $206,000

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 required by law.