Staff Software Engineer, Mobile (App Infrastructure)

Affirm

1d•CA$181,000 - CA$241,000•Remote

About The Position

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. App Infrastructure is the team behind Affirm's shared mobile app infrastructure — the platform every other mobile feature team builds on. We own the app’s shared components: design system, networking, observability, experimentation, CI/CD, app releases, developer tooling, availability/stability, and more. We care about ownership: shipping tools and runbooks other teams actually adopt, writing specs before building, and being the go to experts for the mobile tech stack . We're small, technical, and highly collaborative.

Requirements

7+ years of experience of developing and architecting mobile applications; 4+ using React Native
Proficient in working with Javascript/Typescript.
Hands-on experience with React Native and Expo, and have authored or migrated native modules and components.
Experience with complex state management in a React app.
Performed React Native SDK major updates, and can debug across the JS↔native boundary under the New Architecture.
Experience with mobile testing and observability tooling — E2E frameworks like Maestro/Appium, crash reporting Sentry/Crashlytics, and experimentation/feature-flagging platforms like Statsig/LaunchDarkly — and enjoy building tooling other teams actually adopt.
Proficient and up to date on AI-assisted development — Claude Code or comparable agentic tooling — and apply judgment about where agents help, where they need guardrails, and how to keep the quality bar high.
Proven track record of driving a team to execute large projects
Experience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution plan. You write high quality code that is easily understood and used by others.
Thrive in ambiguity, and are comfortable moving from low level language idioms all the way to the architecture of large systems to understand how they work.
Growth and impact trajectory demonstrates that you have mastered gathering and iterating on feedback from your engineering and cross-functional peers.
Strong verbal and written communication skills that support effective collaboration with our global engineering team.
Equivalent practical experience or a Bachelor’s degree in a related field.

Nice To Haves

Proficiency with Redux Toolkit is bonus

Responsibilities

Setting technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects.
Collaborating across teams in the product development lifecycle by collaborating with product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed.
Acting as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processes.
Taking ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, policies, testing and alerting in place to support “keep the lights on” & on-call efforts.
Fostering a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
Helping develop talent on your team by providing feedback and guidance, and leading by example.