Senior Software Engineer, Backend – Identity International

Affirm

Senior Software Engineer developing foundational identity systems for Affirm’s international expansion. Collaborating with global teams and improving product functionality while ensuring compliance.

Posted 7/15/2026full-timeRemote • 🇪🇸 SpainSenior💰 €86,000 - €122,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing highly available backend systems using Python or Kotlin, while fostering a culture of quality and ownership within the team. Proficient in collaborating with cross-functional teams and leading the delivery of significant features with a focus on elegant and extensible design.

Highest-signal resume keywords

Backend System DevelopmentPython ProgrammingAWS TechnologiesKubernetes ManagementCode Review Standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend System DesignDistributed Systems DevelopmentMySQL Database ManagementTechnical PlanningCode Base Management

Soft Skills

Effective CommunicationTeam CollaborationFeedback and Guidance

Tools & Technologies

AWSKubernetesMySQL

Industry Keywords

Product Development LifecycleQuality AssuranceMetrics MonitoringProcess Improvement

Tech Stack

Tools & technologies

AWSDistributed SystemsKotlinKubernetesMySQLPython

About the role

Key responsibilities & impact

Responsible for owning and delivering quarterly goals for your team
Support peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics
Proactively identify project, process, technology or business issues and lead in solving them
Support the operations and availability of your team’s artifacts by creating and monitoring metrics
Foster a culture of quality and ownership on your team by setting or improving code review and design standards
Help develop talent on your team by providing feedback and guidance, and leading by example

Requirements

What you’ll need

4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin
Track record of developing highly available distributed systems using technologies like 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
Proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely
Demonstrated ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders
Strong verbal and written communication skills that support effective collaboration with our global engineering team.

Benefits

Comp & perks

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