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Lead Engineer / Payment Architect at Maxana. Location:. Remote (U.S. overlap preferred). Type:. Contract (Full-Time Preferred). Domain:. Payments / Fintech / eCommerce Infrastructure. About the Project. We are leading a modernization initiative for a high-growth digital commerce platform focused on . payment orchestration, gateway optimization, and API-driven architecture. .. This role will architect and lead integration efforts involving:. Payment gateway orchestration . Tokenization strategy . Direct PSP integrations . Subscription billing logic . Checkout modernization without disruption . Experience with orchestration platforms such as . Gr4vy, Stripe, etc.. is highly desirable, but not required. Deep payments architecture experience is mandatory.. What You’ll Do. Architect and lead end-to-end payment orchestration strategy . Design multi-PSP routing logic and failover systems . Lead integration from gateway abstraction to direct acquirer connections . Oversee token migration and vault strategy . Ensure PCI-compliant design and security best practices . Guide backend and DevOps engineers through execution . What Success Looks Like. Clean abstraction layer across PSPs . Reduced payment friction . Improved authorization rates . Modernized checkout infrastructure. 8+ years backend engineering experience . 4+ years in payments infrastructure . Strong knowledge of: . REST APIs . Webhooks . Tokenization . Recurring billing logic . Card-not-present flows . Experience integrating PSPs (e.g., Worldpay, Checkout.com, Adyen, Stripe, etc.) . Experience designing high-availability systems . Ideal (Not Required). Gr4vy integration exposure . Subscription/SaaS billing systems . Gateway-to-direct processor migration projects . Company Location: Brazil.