Senior Software Engineer, Backend – Identity International

Affirm

Senior Software Engineer developing backend systems for Affirm's international identity team. Leading engineering efforts to ensure robust and compliant identity solutions for customer checkout.

Posted 7/15/2026full-timeRemote • 🇵🇱 PolandSenior💰 PLN 308,000 - PLN 428,000 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 across teams to define technical plans and advocate for best practices in code quality and design standards.

Highest-signal resume keywords

Backend System DevelopmentAWSKubernetesMySQLCode Review Standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

PythonKotlinDistributed SystemsHigh AvailabilityCode QualityTechnical PlanningMetrics MonitoringProcess ImprovementTool DevelopmentOn-Call Support

Soft Skills

Verbal CommunicationWritten CommunicationCollaborationFeedback SeekingTeam Leadership

Industry Keywords

Product Development LifecycleTechnical ConstraintsRisk ManagementTrade-Off AnalysisQuality Culture

Tech Stack

Tools & technologies

AWSDistributed SystemsKotlinKubernetesMySQLPython

About the role

Key responsibilities & impact

You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery.
You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.
You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them.
You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.
You will foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
You will 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
A 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
You write high quality code that is easily understood and used by others
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
Your experience demonstrates that you take 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

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
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
This role is eligible for creative tax benefits, subject to applicable law and company policy