Software Engineer II, Fullstack – Repayment UX

Affirm

. Break down larger projects into individual tasks and deliver them in multiple phases .

Posted 10/27/2026full-timeRemote • SpainJunior💰 €73,000 - €109,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing, developing, and launching backend systems using Python or Kotlin, while effectively collaborating with cross-functional teams to deliver high-quality software solutions. Proficient in writing clear, well-tested code and participating in on-call rotations to ensure system reliability.

Highest-signal resume keywords

Backend System DevelopmentPython ProficiencyKotlin ProficiencyDeclarative UI FrameworksCode Review Participation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend System DesignWeb Application DevelopmentMobile Application DevelopmentDebuggingCode Testing

Soft Skills

Strong Communication SkillsCollaboration

Tools & Technologies

ReactVueReact Native

Industry Keywords

Software EngineeringOn-Call RotationMetrics MonitoringTechnical ConstraintsRisk Evaluation

Tech Stack

Tools & technologies

KotlinPythonReactReact NativeVue.js

About the role

Key responsibilities & impact

Break down larger projects into individual tasks and deliver them in multiple phases
Collaborate with teammates to ensure timely delivery
Collaborate with product management, design and analytics during ideation and decision-making
Articulate technical constraints and evaluate risks and trade-offs
Create and monitor metrics for team artifacts
Escalate issues and support availability and keep-the-lights-on efforts
Participate in the on-call rotation
Participate in growth and development activities, including interviewing

Requirements

What you’ll need

1.5+ years of experience as a software engineer
Experience designing, developing and launching backend systems
Proficiency in Python or Kotlin
Experience shipping web apps using declarative UI frameworks like React or Vue
Experience developing and architecting mobile applications using declarative UI frameworks like React Native is a bonus
Comfortable navigating a large code base and debugging others' code
Experience providing feedback through code reviews
Ability to design solutions interacting with multiple software components
Ability to write clear, well-tested and extensible code
Strong verbal and written communication skills
Ability to participate in an on-call rotation

Benefits

Comp & perks

Monthly stipends for health, wellness and tech spending
100% subsidized medical coverage, dental and vision for you and your dependents
Flexible Spending Wallets for tech, food and lifestyle
Away Days - wellness days to take off work and recharge
Learning & Development programs
Parental benefits
Employee Resource & Community Groups
Health coverage at no cost: We cover 100% of premiums for employees and their dependents.
Spending stipends for tech setup, health and wellness options
Flexible time off and generous holiday calendars
Employee stock purchase plan (ESPP) to buy Affirm stock at a discount
Inclusive interview process accommodations for candidates with disabilities
In-person onboarding experience