Senior Software Engineer, Fullstack (Consumer Engineering)

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.

Consumer Growth Experience

Engineering (CGX) builds the platforms and end‑to‑end experiences that power affirm’s consumer growth across push, email, app, and web. We own the core engagement surfaces and systems that help customers discover value, onboard seamlessly, and take confident next steps by using personalization, segmentation, and experimentation to deliver the right experience at the right moment. Our work sits at the intersection of product, analytics, design, platform, and growth.

We focus on building scalable, reliable tooling and consumer experiences that enable rapid go‑to‑market, improve conversion and activation, and grow long‑term customer value. If you’re excited about shaping high‑impact consumer journeys, solving ambiguous growth problems, and turning strategy into measurable outcomes at scale, CGX is the team for you. What You’ll Do Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open‑ended problems, and ensuring that everyone is supported throughout delivery.

Support peers and stakeholders in the product development lifecycle by collaborating with product management, design, and analytics, participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade‑offs. Proactively identify project, process, technology, or business issues, advocate for them, and lead in solving them. Support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” and on‑call efforts.

Foster a culture of quality and ownership by setting or improving code review and design standards for your team, and advocating for them beyond your team through writing and tech talks. Help develop talent on your team by providing feedback and guidance, and leading by example.

What We Look For

Experience leading significant mobile initiatives (React Native or native), including defining architecture, coordinating cross‑functional launches, and maintaining high reliability in production environments.

Experience working across the React Native and native boundaries (Swift/Kotlin), debugging platform‑specific issues and improving developer tooling, CI/CD, and release processes for mobile apps.

Experience implementing experimentation, feature flagging, and analytics instrumentation in mobile applications, ensuring safe rollouts and measurable impact.

Experience shipping web apps using declarative UI frameworks like React or Vue. Proficiency in working with JavaScript/TypeScript. A total of 4+ years of experience as a software engineer.

Experience designing, developing, and launching backend systems at scale using technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.

Experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple, and extensible design, and writing high‑quality code that is easily understood and used by others. Proficiency at making significant changes in a large codebase and having developed a suite of tools and practices that enable you and your team to do so safely. Demonstrated ownership of growth and proactive seeking of feedback from team, manager, and stakeholders.

Strong verbal and written communication skills that support effective collaboration with a global engineering team. This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Pay Grade - N

Equity Grade - CAN 6 Employees new to affirm typically come in at the start of the pay range. The 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: $150,000 - $200,000. Affirm is a remote‑first company. The majority of our roles are remote and you can work almost anywhere within the country of hire. We have a simple and transparent remote‑first grade‑based compensation structure. We’re extremely proud to offer competitive benefits 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 b