Senior Backend Engineer – Global Communications

Affirm, Inc.; United States; Remote; USD 97,000 - 137,000; Full time

Benefits offered by this job

Flexible spending wallets

Wellness days

Learning & Development

Parental benefits

ESP stock purchase plan

Job summary

Affirm, Inc. is seeking a senior backend engineer to join its Communications team. You will shape multi-region, multi-tenant infrastructure, APIs, and vendor integrations enabling product teams to communicate with customers at scale.

You will own quarterly goals, design reliable backend services, and collaborate across product, design, analytics, security, and engineering to balance reliability and cost. This is a remote Spain role within a flexible, remote-first company.

Qualifications

• 5+ years of software development or engineering experience with system design.
• Proficient in Python, Kotlin, or similar languages.
• Experience building highly available distributed systems on AWS with MySQL/DynamoDB and Kubernetes.

Responsibilities

• Own and deliver quarterly technical goals for Communications, collaborating to solve ambiguous problems.
• Design and evolve backend services for high-volume communications across multi-region, multi-tenant environments.
• Collaborate with product, design, analytics, security, and engineering partners throughout the lifecycle.
• Design, implement, and operate resilient integrations with external messaging vendors.
• Identify and solve issues affecting scalability, developer experience, and operational resilience.
• Support on-call efforts and define SLAs/metrics for service availability.
• Improve design, testing, code review, rollout, and operational standards; mentor others.

Skills

Distributed systems

Python/Kotlin

AWS

MySQL

DynamoDB

Kubernetes

Multi-region

Multi-tenant

Vendor integrations

On-call readiness

Job description

Affirm, Inc. is seeking a senior backend engineer to join its Communications team. You will shape multi-region, multi-tenant infrastructure, APIs, and vendor integrations enabling product teams to communicate with customers at scale.

You will own quarterly goals, design reliable backend services, and collaborate across product, design, analytics, security, and engineering to balance reliability and cost. This is a remote Spain role within a flexible, remote-first company.