Senior Integration Engineer

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Full Time Professional Remote, US

11 days ago Requisition

Position Title: _Senior Integration/API Software Engineer

Location:
Remote (In the U.S)

Other Considerations: U.S. Citizen or Permanent Resident (Required)

Sprezzatura is seeking an experienced Integration / API Software Engineer to support the implementation of a modernized financial and budget application for a federal client
.

This hands-on technical role will design, develop, test, and support APIs and system integrations connecting modernized capabilities with existing enterprise and legacy applications
. You will work closely with platform, data, functional, and testing teams to enable secure, reliable exchange of financial, acquisition, planning, and related enterprise data.

The ideal candidate combines strong software/API development skills with knowledge of Federal or VA enterprise systems, legacy applications, data structures, and integration patterns
. Prior One Stream experience is not required as you will partner with One Stream technical resources responsible for the platform-side implementation.

• Design, develop, test, deploy, and maintain RESTful APIs and system integrations connecting legacy and modern enterprise applications
• Analyze existing system interfaces, data structures, business rules, and dependencies to support modernization and integration activities
• Develop and maintain API contracts, interface specifications, data mappings, transformations, and related technical documentation
• Develop secure, reusable integration components using appropriate programming languages, frameworks, and enterprise integration patterns
• Implement authentication and authorization, input/schema validation, error handling, logging, retries, exception handling, and other controls necessary for reliable integrations
• Develop data transformation and mapping logic to support information exchange between systems with differing data models and structures
• Work with One Stream developers and data integration resources to define how external data will be exchanged with and consumed by the platform
• Support data validation, reconciliation, control totals, duplicate detection, and exception processing to ensure interface accuracy and completeness
• Develop and execute automated API and integration tests and support end-to-end and regression testing
• Troubleshoot interface, API, data, connectivity, and performance issues across integrated systems and support root-cause analysis and resolution
• Participate in code reviews, configuration/version control, CI/CD processes, release activities, and production support
• Collaborate with architects, developers, BAs, data engineers, security resources, and testers throughout the integration lifecycle

• 8+ years of software development or systems integration experience, including significant hands‑on API or backend development
• Demonstrated experience designing, developing, and supporting RESTful APIs and enterprise system integrations
• Proficiency with Java, C#/.NET, Python, or comparable backend development technologies
• Experience working with JSON, XML, REST, HTTP/HTTPS, and API specifications such as OpenAPI/Swagger
• Experience with API authentication and authorization approaches such as OAuth 2.0, tokens, certificates, or similar enterprise security mechanisms
• Experience with relational databases, SQL, data mapping, transformation, validation, and reconciliation
• Experience implementing robust integration controls including logging, error handling, retries, exception management, and monitoring
• Experience with…