Senior Integration Engineer

Sprezzatura

. Design, develop, test, deploy, and maintain RESTful APIs and system integrations connecting legacy and modern enterprise applications .

Posted 9/22/2026full-timeRemote • United StatesSenior💰 $130,000 - $140,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive experience in designing, developing, and maintaining RESTful APIs and enterprise system integrations, with a strong focus on data mapping, transformation, and validation. Proficient in implementing integration controls and automated testing processes to ensure robust and secure data exchanges across multiple systems.

Highest-signal resume keywords

RESTful API DevelopmentJava, C#/.NET, PythonAPI Authentication and AuthorizationSQL and Relational DatabasesAutomated Testing with Postman/Newman

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

API DevelopmentSystems IntegrationData MappingData TransformationError HandlingLoggingVersion ControlIntegration TestingRoot-Cause AnalysisCI/CD Processes

Tools & Technologies

PostmanNewmanGitOpenAPI/SwaggerJSONXMLHTTP/HTTPS

Industry Keywords

Enterprise ApplicationsIntegration PatternsAuthentication MechanismsFederal Background InvestigationTelecommuting

Tech Stack

Tools & technologies

JavaPythonSQL.NET

About the role

Key responsibilities & impact

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 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 related controls
Develop data transformation and mapping logic for systems with differing data models and structures
Work with OneStream developers and data integration resources to define external data exchange with the platform
Support data validation, reconciliation, control totals, duplicate detection, and exception processing
Develop and execute automated API and integration tests; support end-to-end and regression testing
Troubleshoot interface, API, data, connectivity, and performance issues; 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, business analysts, data engineers, security resources, and testers throughout the integration lifecycle

Requirements

What you’ll need

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 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 integration controls including logging, error handling, retries, exception management, and monitoring
Experience with source/version control such as Git and modern software development practices
Experience developing or executing automated API/integration tests using Postman/Newman or comparable technologies
Experience troubleshooting complex interfaces and data exchanges across multiple enterprise systems
Ability to meet applicable Federal background investigation/security requirements
U.S. Citizen or Permanent Resident required
Reliable internet service for effective telecommuting on remote days
Ability to work occasional extended or weekend hours based on operational needs

Benefits

Comp & perks

Medical, Dental, and Vision
Health Saving Account (when enrolled in eligible plan) with Company contribution
Company paid Life, Accidental Death, Short-term & Long-term Disability
Voluntary Accident, Hospital Indemnity, & Critical Care Insurance
Voluntary Medical & Dependent Care Flexible Spending Accounts
Accrued Paid Time Off & Company Paid Holidays
401(k) Retirement Plan with Company match
Remote telecommuting arrangement
Standard business hours, Monday through Friday