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Staff Sales Engineer

Affirm - Remote - Remote - posted 2026-09-09

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Affirm is seeking a Staff Sales Engineer to join the Merchant Engineering team and drive technical strategy for enterprise customers. In this role, you'll combine deep technical expertise with exceptional communication to help merchants design and implement scalable solutions on the Affirm platform. You'll serve as a subject matter expert on Affirm's integration solutions, demonstrating mastery of merchant checkout, customer journeys, and competitive positioning. Your responsibilities include leading technical discovery during pre-sales, architecting elegant solutions for complex customer challenges, and managing advanced integrations and customizations. You'll evaluate tradeoffs across merchant constraints, platform capabilities, and non-functional requirements to design tailored solutions aligned with each customer's business and technical priorities. As a trusted technical advisor, you'll build strong relationships with enterprise and key merchants, both internally and externally. You'll partner closely with sales and partner engineering teams to drive opportunities for the largest customers, leading solution strategy and laying groundwork for successful implementations. Acting as the "voice of the customer," you'll provide actionable insights to influence product development and feature prioritization. Key responsibilities include creating and sharing best practices and reusable assets to enhance go-to-market efficiency, providing technical and architectural input into sales planning and forecasting, identifying technical risks early, and collaborating with Sales Operations to design scalable engagement models. You'll develop pre-sales support materials, build and present custom demos, and work cross-functionally with Sales, Engineering, and Product teams. Required qualifications: 6+ years in Sales Engineering, Solution Architecture, Partner Engineering, or related pre-sales roles with focus on solution architecture; 3+ years in payments, fintech, or closely related industry; strong technical acumen in API integrations, SaaS platforms, and enterprise architectures with emphasis on checkout and payment systems; extensive experience with ecommerce, in-store, and telesales checkout solutions; solid understanding of financial infrastructure trends; ability to write scripts in at least one programming language; excellent communication skills and executive presence; BA/BS in business/technology or equivalent experience.

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