Senior Staff Software Engineer, Fullstack – Marketplace, Consumer Experiences

Affirm

Senior Staff Engineer leading technical strategy for Affirm’s Marketplace, Search, and consumer experiences. Building scalable platforms across iOS, Android, and Web for its transparent buy-now-pay-later products.

Posted 9/3/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $236,000 - $325,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in defining technical direction and implementing strategies that enhance reliability and responsiveness across consumer-facing platforms. Proven ability to mentor engineers, drive architectural improvements, and foster a culture of ownership and collaboration.

Highest-signal resume keywords

Technical Strategy DevelopmentArchitectural ImprovementsProject Management ExperienceMentorship and LeadershipCross-Functional Collaboration

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

React NativeJavascriptKotlinBackend DevelopmentTechnical Roadmap DefinitionPlatform ArchitectureCore Platform FunctionalityUser Experience DesignScalability SolutionsReliability Engineering

Soft Skills

Strong Communication SkillsOwnership MindsetCustomer-First Mindset

Certifications & Qualifications

Bachelor’s Degree in Related Field

Industry Keywords

MarketplaceSearchAds PlatformApp ExperiencesTechnical ExcellenceEngineering TeamsOrganizational Boundaries

Tech Stack

Tools & technologies

JavaScriptKotlinReactReact Native

About the role

Key responsibilities & impact

Define the technical direction, long-term technical roadmap, and strategic initiatives in Marketplace, Search, Ads Platform, and App Experiences
Champion and implement technical excellence across consumer-facing experiences in conjunction with business results
Create and influence a strong ownership culture across teams, with accountability for scale and efficiency
Guide and deliver critical user experiences quickly and reliably
Design, implement, and extend core platform components and functionality
Architect and contribute to decisions on platforms, tools, and technologies
Mentor and lead engineers by championing best practices and supporting their growth
Collaborate with engineering leaders and stakeholders to build scalable, reliable, high-performing solutions

Requirements

What you’ll need

10+ years of experience working across the stack, driving architectural improvements in the backend
Bonus points using languages like React Native, Javascript, or Kotlin
Track record of successfully leading critical projects and leveraging multiple engineering teams across organizational boundaries for company-wide results
Extensive experience developing and implementing technical strategy that drove prominent change in reliability and responsiveness
Previous project management or people management experience
Strong verbal and written communication skills
Equivalent practical experience or a Bachelor’s degree in a related field
Ownership mindset and customer-first mindset
Ability to work collaboratively across engineering teams and cross-functional stakeholders
Comfortable diving into code and systems, understanding dependencies, and improving them

Benefits

Comp & perks

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 buy shares of Affirm at a discount
Equity rewards
Monthly stipends for health, wellness and tech spending
Dental and vision coverage for you and your dependents
Reasonable accommodations during the hiring process