Be the technical face of Affirm to partners like Shopify and Stripe, translating integration challenges into solutions

Affirm needs a senior Partner Solutions Engineer to own technical leadership across commercial and product partnership programs, acting as the engineering-facing SME for external partners' BNPL checkout integrations. This is a customer-facing engineering role blending solution design, integration troubleshooting, and cross-team project execution — remote from Canada.

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What this interview tests

Partner/solutions engineering for ecommerce and payments integrations
REST API, JSON, webhook troubleshooting and technical fluency across languages
Project planning: solution design, timeline estimation, task breakdown, testing plans
Acting as SME and escalation point for both internal and external technical stakeholders
Cross-functional influence across Commercial, Product, and Engineering teams
Alerting/monitoring tooling awareness

Common question themes

Walk me through diagnosing a broken partner integration involving a webhook or REST API contract

How do you build and communicate a project plan for a multi-team partner integration rollout

Tell me about a time you were the technical point of escalation between an external partner and internal engineering

How would you explain a complex integration issue to a non-technical partner stakeholder under time pressure

What's your experience with ecommerce platforms, payment processors, gateways, or wallets specifically

How do you decide when to build custom tooling vs. recommend an existing platform capability to a partner

How candidates describe it

Real Senior Partner Engineer interview stories — retold from candidates' public write-ups, with sources.

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