Software Engineer I, Frontend (Upfunnel)

Affirm; London; Remote; CAD 101,000 - 151,000; Full time

Benefits offered by this job

100% health coverage

Monthly stipends for tech setup

Flexible time off

ESPP stock plan

Job summary

Affirm is hiring a Software Engineer I for the Upfunnel team. You will build and improve frontend experiences that help shoppers understand Aff before checkout, collaborating across modules like Aff.js, promotional messaging, experimentation, and developer tooling.

You should have experience shipping web apps with React or Vue and strong JavaScript/TypeScript skills, plus a track record of writing clear, tested, and extensible code in a large codebase.

Qualifications

• Experience shipping web apps using declarative UI frameworks like React or Vue.
• Experience with Javascript/Typescript.
• Ability to break down problems and write clear, well-tested, extensible code.
• Comfort navigating large code bases and doing code reviews.
• Proactive in growth and communication within a global team.

Responsibilities

• Build and improve high-traffic frontend experiences across Aff.js, messaging, experimentation, and tooling.
• Collaborate with team and stakeholders; communicate risks and trade-offs clearly.
• Balance speed and quality to meet business goals while protecting systems from downtime.
• Use browser debugging, monitoring, and testing tools to maintain reliable cross-browser experiences.
• Contribute to team community through growth and development activities.

Skills

React

Vue

JavaScript

TypeScript

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.

About The Engineering Team

The Engineering team builds systems that power Aff’s mission. We take pride in our craft, building reliable, performant, and scalable solutions that touch every part of the business. Whether we’re enabling new ways to pay, ensuring our platforms can scale to the most demanding levels in the industry, or developing seamless servicing experiences, our focus is on solving complex problems through exceptional engineering.

About The Role

The Upfunnel team builds pre-checkout experiences that help shoppers understand Aff on merchant sites. As a Software Engineer I, you will contribute to reliable, accessible, and performant experiences across Aff.js, promotional messaging, experimentation, and developer-facing frontend tooling.

What You’ll Do

We are looking for a collaborative, curious Software Engineer I to build reliable and scalable frontend experiences that make Aff’s value clear before checkout.

• You will build and improve high-traffic frontend experiences across Aff.js, promotional messaging, experimentation, and developer-facing tooling.
• 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 use browser debugging, monitoring, metrics, and testing tools to maintain reliable cross-browser experiences and contribute to operational issues with your team.
• 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 shipping web apps using declarative UI frameworks like React or Vue.
• You have previous work or internship experience working with Javascript/Typescript.
• 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 posting is for an existing vacancy.

Pay Grade - J

Equity Grade - CAN 4

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.)

CAN base pay range per year: 101,000 - 151,000 CAD

Location - Remote Canada

This remote role is open only to candidates residing in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan.

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

• 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.