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Affirm

Senior Software Engineer, Back-end – Repayment Scheduling

Affirm

Senior Software Engineer designing and developing backend systems at Affirm, focusing on payment automation and financial impact for users.

Posted 7/16/2026full-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 backend systems at scale, with a focus on technologies such as Python, AWS, and Kubernetes. Proven ability to lead teams through ambiguity, fostering a culture of quality and ownership while effectively collaborating with cross-functional stakeholders.

Highest-signal resume keywords
Backend System DesignPython DevelopmentAWS TechnologiesKubernetes ManagementCode Review Standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Backend System DevelopmentDistributed Systems DesignCode Base ModificationTechnical PlanningMetrics Monitoring
Soft Skills
Verbal CommunicationWritten CommunicationTeam LeadershipFeedback ProvisionCollaboration
Tools & Technologies
AWSMySQLKubernetes
Industry Keywords
Product Development LifecycleQuality AssuranceProcess ImprovementStakeholder Advocacy

Tech Stack

Tools & technologies
AWSDistributed SystemsKotlinKubernetesMySQLPython

About the role

Key responsibilities & impact
  • Owning and delivering quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
  • Supporting peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics.
  • Proactively identifying project, process, technology or business issues, advocating for them, and leading in solving them.
  • Supporting the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed.
  • Fostering a culture of quality and ownership through improved code review and design standards.
  • Helping 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, developing tools and practices that enable safe modifications.
  • Demonstrated ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.
  • Strong verbal and written communication skills supporting collaboration with a 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
  • ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount