Senior Software Engineer, Fullstack (App Experience)

Affirm; Boulder (CO); Remote; USD 173,000 - 233,000; Full time

Benefits offered by this job

Medical coverage

Tech stipends

Flexible time off

ESPP stock purchase

Job summary

Affirm is a remote-first company focused on transparent pay with no hidden fees and no tradeoffs on what matters most. We hire engineers who ship with React/Vue on the web, React Native for mobile, and design APIs using Kotlin or Python, delivering clear, well-tested code across large codebases.

The role emphasizes ownership, collaboration with product/design/analytics, and contributing to maintainable, scalable systems.

Qualifications

• 1.5+ years of software engineering experience.
• Experience shipping web apps with React or Vue.
• Experience shipping mobile apps with React Native.
• Experience designing, developing and launching APIs using Kotlin or Python.
• Ability to translate simple problems into multi-component solutions with well-tested, extensible code.
• Comfort navigating a large codebase, debugging others, and giving feedback via code reviews.
• Demonstrates ownership of personal growth and seeks feedback.
• Strong verbal and written communication for a global engineering team.
• Equivalent practical experience or a Bachelor's degree in a related field.

Responsibilities

• Break down large projects into tasks, deliver in phases, and collaborate for timely delivery.
• Collaborate with product, design, and analytics to discuss constraints and trade-offs.
• Create and monitor metrics, support on-call tasks and keep team systems running.
• Contribute to team growth by participating in the interview process and peer development.

Skills

React / Vue

React Native

API design

Clean code

Ownership

Communication

Education

Bachelor's degree or equivalent

Job description

At Aff, 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’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 or Vue
• You have experience shipping mobile apps using native or cross-platform languages like React Native
• You have experience designing, developing and launching APIs at scale using languages like Kotlin or Python.
• 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 Aff typically come in at the start of the pay range. Aff 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 Aff 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 Aff 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: Aff considers qualified applicants with arrest and conviction records, as required by law.