Senior Backend Engineer, Fraud – Real-Time Risk (Remote)

Affirm; España; A distancia; EUR 90.000 - 130.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

100% health coverage for you and your/

Equity rewards

Visa sponsorship possible

Remote-first with flexible in Spain

Descripción de la vacante

Afffirm is hiring a Senior Software Engineer to own backend systems for fraud decisioning. You’ll design real-time services in Python or Kotlin, integrate regional vendors, and scale launches across new markets from a remote Spain base.

You’ll collaborate with teams in product, ML, analytics, and fraud strategy, shaping architecture, reliability, and AI-assisted development in a fast-growing fintech environment.

Formación

• 5+ years of experience building backend systems at scale using Python or Kotlin.
• Experience with distributed systems and infrastructure using AWS, MySQL/PostgreSQL, and Kubernetes.
• Strong system design skills and a track record of delivering maintainable, extensible services.
• Fluency with AI-driven engineering and tooling usage in development.
• Proficiency in SQL and working with data-rich environments.
• Familiarity with CI/CD practices and safe production deployments.
• Strong written and verbal communication skills in distributed teams.
• Experience with Snowflake, dbt, Airflow, Chronosphere is nice to have.
• Background in fraud prevention, risk systems, or real-time decisioning is nice to have.
• Experience building for multiple markets or regions - internationalization or localization is nice to have.

Responsabilidades

• Own and deliver quarterly goals for your team, guiding engineers through ambiguity.
• Design and implement real-time fraud decisioning services and APIs in Python or Kotlin.
• Build and evolve the platform to launch fraud decisioning in new markets quickly.
• Integrate region-specific fraud and risk vendors and operationalize AI signals.
• Collaborate with product, ML, analytics, and fraud strategy across the development lifecycle.
• Maintain service reliability through monitoring, on-call involvement, and incident response.
• Foster a culture of quality, code review, and mentorship.
• Participate in on-call rotations as a requirement.

Conocimientos

Python

Kotlin

AWS

MySQL/PostgreSQL

Kubernetes

SQL

CI/CD

Distributed systems

AI/ML tooling

English communication

Herramientas

Snowflake

dbt

Airflow

Chronosphere

Descripción del empleo

Afffirm is hiring a Senior Software Engineer to own backend systems for fraud decisioning. You’ll design real-time services in Python or Kotlin, integrate regional vendors, and scale launches across new markets from a remote Spain base.

You’ll collaborate with teams in product, ML, analytics, and fraud strategy, shaping architecture, reliability, and AI-assisted development in a fast-growing fintech environment.