Senior API & Integration Engineer — Remote

ADP, Inc.; United States; Remote; USD 130,000 - 140,000; Full time

Benefits offered by this job

Medical, Dental, and Vision

401(k) Retirement Plan with Company x

Paid Time Off

Flexible work arrangements

Job summary

Sprezzatura is seeking an experienced Integration/API Software Engineer to design, develop, test, and support RESTful APIs and system integrations for a modernized federal finance and budget application.

You will work with platform, data, functional, and testing teams to enable secure data exchange across enterprise and legacy systems, leveraging strong API and integration patterns in a remote US-based role.

Qualifications

• 8+ years of software development or systems integration experience.
• Demonstrated experience designing, developing, and supporting RESTful APIs and enterprise system integrations.
• Proficiency with Java, C#/ .NET, Python, or comparable backend development technologies.
• Experience 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.

Responsibilities

• 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 OneStream 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

Skills

API development

RESTful APIs

Backend development

Security

Data integration

OpenAPI/Swagger

OAuth 2.0

Git

Tools

OneStream

Git

Postman/Newman

OpenAPI/Swagger

Job description

Sprezzatura is seeking an experienced Integration/API Software Engineer to design, develop, test, and support RESTful APIs and system integrations for a modernized federal finance and budget application.

You will work with platform, data, functional, and testing teams to enable secure data exchange across enterprise and legacy systems, leveraging strong API and integration patterns in a remote US-based role.