
Job Overview
Location
Remote Spain
Job Type
Full-time
Category
Backend Engineer
Date Posted
March 11, 2026
Full Job Description
đź“‹ Description
- • As a Senior Software Engineer on the Merchant Data Platform team at Affirm, you will play a pivotal role in shaping the future of our backend infrastructure, specifically focusing on merchant data and identity across all customer touchpoints.
- • This is a critical, checkout-facing platform that handles millions of requests daily, supports the seamless onboarding of new merchants, and operates under stringent availability and latency Service Level Agreements (SLAs).
- • You will be instrumental in designing, developing, and maintaining sophisticated data pipelines that enrich our datasets, crucial for accurate merchant identification, robust risk analysis, and effective fraud detection.
- • Your responsibilities will extend to owning and delivering quarterly team goals, providing technical leadership and mentorship to fellow engineers, and guiding them through complex, open-ended problems.
- • You will actively participate in the entire product development lifecycle, collaborating closely with Product Management, Design, and Analytics teams.
- • This collaboration involves contributing to ideation sessions, clearly articulating technical constraints, and making informed decisions that carefully balance risks and trade-offs to ensure optimal outcomes.
- • A key aspect of your role will be to proactively identify and champion solutions for project, process, technology, or business challenges, driving them to resolution.
- • You will be responsible for detailed project definition, architectural design, securing cross-functional alignment, accurate estimation, and the subsequent breakdown, delivery, monitoring, and maintenance of software components.
- • Ensuring the operational health and availability of your team's systems is paramount. This includes creating and meticulously monitoring key performance metrics, escalating issues as needed, and actively participating in "keep the lights on" efforts and on-call rotations.
- • You will foster a strong sense of community and continuous improvement within your team by engaging in growth and development activities, including contributing to the interview process for new talent.
- • Mentoring junior engineers will be a significant part of your role, focusing on enhancing their design skills, code quality, and testing methodologies.
- • You will take direct ownership of the availability, reliability, and performance of the systems your team manages, ensuring they meet and exceed business expectations.
- • The role requires participation in an on-call rotation to provide timely support for critical systems.
- • You will leverage your expertise in designing and launching scalable backend systems, utilizing technologies such as AWS, MySQL, and Kubernetes to build highly available distributed systems.
- • Your ability to synthesize complex business requirements and technical specifications into high-quality, maintainable system designs and software will be essential.
- • You will be adept at navigating large codebases, debugging intricate issues, and providing constructive feedback to peers through thorough code reviews.
- • A proven track record of defining technical plans for significant feature deliveries or system components, emphasizing elegant, simple, and extensible designs, is expected.
- • You will write high-quality, well-documented code that is easily understood and utilized by other engineers.
- • Your experience should demonstrate proficiency in making substantial, safe changes within large codebases, supported by a suite of tools and practices that enable efficient and reliable development.
- • You will embody a proactive approach to your own growth, actively seeking feedback from your team, manager, and stakeholders to continuously improve.
- • Strong verbal and written communication skills are vital for effective collaboration within Affirm's global engineering team.
- • This role offers the opportunity to work remotely within Spain, contributing to a dynamic and innovative fintech company that is revolutionizing credit.
Skills & Technologies
About Affirm Holdings, Inc.
Affirm Holdings operates a point-of-sale consumer lending platform that integrates with online and in-store checkout systems. Through its technology, shoppers can split purchases into fixed, transparent installment payments, while merchants gain conversion and larger order values. The company underwrites and services loans in the United States and Canada using alternative credit models and data partnerships with banks, avoiding deferred-interest structures. It earns revenue from merchant fees and interest on loans, and offers a mobile app for consumers to manage repayment schedules and access additional credit lines.
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