Payment Processing Provider: AI-Assisted SOAP-to-REST Modernization on AWS

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  The customer needed to modernize legacy application integrations while preserving the transaction behavior required by existing merchant workflows.

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  The transition from SOAP-based applications to an internal REST-based platform required transaction response mapping, integration testing, and merchant-specific validation.

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  The engagement needed to address both application transformation and operational readiness. This included completing RunTransaction response mapping, validating the connected solution through integration and end-to-end testing, migrating merchants, supporting deployments, and stabilizing the implementation after deployment.

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  With more than 60 vendors involved in the broader initiative, the customer also needed a repeatable migration approach that applied consistent engineering and validation practices across individual merchant integrations.

NuVista AI developed an AI-based engine to support migration from legacy SOAP-based applications to the customer’s REST-based internal platform on AWS.

AI-Assisted SOAP-to-REST Modernization

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  The engine supported AI-assisted adapter development, paired with manual engineering review to address the requirements of existing transaction workflows.

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  The team completed RunTransaction response mapping and performed integration and end-to-end testing. These activities examined the behavior of the connected application flow rather than treating API conversion alone as evidence of a successful migration.

Testing, Merchant Validation & Deployment Readiness

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  NuVista AI completed migration and validation for 14 merchants within the engagement’s defined implementation scope.

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  Merchant-specific validation formed part of the delivery process, connecting the application transformation work to the integrations used by the customer’s merchant community.

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  The team provided deployment support in quality-assurance and preproduction environments, followed by post-deployment stabilization. This brought together API transformation, testing, merchant validation, and deployment support within a consistent delivery process.

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  The approach established a repeatable sequence for migration execution: response mapping, integration and end-to-end testing, merchant migration and validation, deployment support, and stabilization.

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  The customer received an AI-based migration engine and completed implementation work supporting its transition from legacy SOAP-based applications to an AWS-based REST platform.

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  AI-assisted development was combined with manual review and testing rather than used as a substitute for engineering validation.

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  The completed delivery included RunTransaction response mapping, integration and end-to-end testing, and migration and validation of 14 merchants.

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  NuVista AI also supported QA and preproduction deployments and completed post-deployment stabilization activities.

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  The engagement established a repeatable migration approach that connected API modernization with merchant-level validation and operational readiness.

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  This delivery addressed the defined merchant group within the customer’s broader modernization initiative involving more than 60 vendors.