Senior Backend Engineer (Fintech)

TL;DR

Senior Backend Engineer (Python/Kotlin): Building and optimizing payment automation systems for a large-scale BNPL platform with an accent on high availability and distributed systems. Focus on scaling payment orchestration, leading technical delivery of quarterly goals, and ensuring system reliability for millions of users.

Location: Must be based in Spain (Visa sponsorship available)

Salary: €86,000 - €122,000 per year

Company

Affirm is a fintech company reinventing credit through honest and friendly buy now pay later services.

What you will do

• Own and deliver quarterly team goals, leading engineers through ambiguity to solve open-ended problems.
• Collaborate with product management, design, and analytics to define technical constraints and trade-offs.
• Identify and resolve project, process, and technology issues.
• Manage operations and availability through metrics, monitoring, and on-call rotation.
• Set and improve code review and design standards to foster a culture of quality.
• Provide guidance and feedback to help develop talent within the team.

Requirements

• 4+ years of experience developing backend systems at scale using Python or Kotlin.
• Track record of building highly available distributed systems with AWS, MySQL, and Kubernetes.
• Experience creating technical plans for significant features with extensible designs.
• Proficiency in making safe changes within large codebases.
• Must be based in Spain.
• Strong verbal and written communication skills for global collaboration.

Culture & Benefits

• Remote-first culture with flexible work arrangements within Spain.
• 100% subsidized medical, dental, and vision coverage for employees and dependents.
• Flexible spending wallets for technology, food, and lifestyle.
• Wellness "Away Days" to recharge.
• Learning and development programs and parental benefits.
• Employee Stock Purchase Plan (ESPP) and equity rewards.