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Salary: EUR 86,000 - 122,000 / annual
Affirm is hiring a Senior Software Engineer to join the Communications Core team, which builds and modernizes the highly available platform delivering billions of customer messages reliably across the customer journey.
You will own and deliver quarterly technical goals for the Communications area, collaborating with teammates to solve ambiguous, open-ended problems across messaging infrastructure. Your responsibilities include:
• Design and evolve reliable backend services for high-volume communications across multi-region, multi-tenant environments, including orchestration, delivery, preferences, templates, and observability.
• Collaborate with product management, design, analytics, security, and engineering partners throughout the product lifecycle, articulating technical constraints and balancing customer impact, risks, and trade-offs.
• Design, implement, and operate resilient integrations with external messaging vendors, balancing reliability, latency, cost, and compliance.
• Proactively identify and solve project, process, technology, or business issues that affect scalability, developer experience, and operational resilience.
• Support operations and availability of team services by defining service-level objectives and metrics, improving alerting and incident response, and participating in on-call efforts.
• Foster quality and ownership by improving design, testing, code review, rollout, and operational standards, and advocating for them through writing and tech talks.
• Help develop talent on your team by providing feedback, mentorship, and technical direction, and leading by example.
• Participate in on-call rotation as a requirement of the role.
Affirm is a remote-first company. Most roles can be done from almost anywhere within Spain. All new hires will be invited to attend an in-person onboarding experience. Visa sponsorship is available, but candidates must be based in Spain.
REQUIREMENTS:
• 5+ years of experience in software development or engineering, with deep understanding of system design and architecture.
• Proficiency in modern programming languages such as Python, Kotlin, or similar.
• Track record of developing highly available distributed systems using technologies like AWS, MySQL, DynamoDB, and Kubernetes.
• Experience designing multi-region, multi-tenant platforms with strong isolation, scalability, failure recovery, and data-consistency guarantees.
• Experience integrating with third-party communications or messaging vendors and designing abstractions that account for different capabilities, rate limits, and failure modes.
• Experience defining a technical plan for the delivery of a significant feature or system component with elegant, simple, and extensible design. Write high-quality code that is easily understood and used by others.
• Proficiency at making significant changes in large code bases, and have developed a suite of tools and practices that enable you and your team to do so safely.
• Proficiency with AI-assisted development tools and apply sound judgment to validate their outputs.
• Demonstrated ownership of your growth, proactively seeking feedback from your team, manager, and stakeholders.
• Strong verbal and written communication skills that support effective collaboration with global engineering team.
