Senior API & Integration Engineer — Hybrid

Concept Solutions, LLC

Reston (VA)

Hybrid

USD 170,000 - 180,000

Full time

4 days ago

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Job summary

Concept Solutions, LLC in Reston, VA is seeking a Senior Integration Engineer to support a mission-critical DoW application modernization. You will maintain integration services across an portfolio of applications, working with API gateways, legacy interfaces, and modern integration patterns to ensure reliable communication.

Location is hybrid with on-site work in Northern Virginia and approved remote locations in the United States; travel is 0–10%.

Qualifications

7+ years of experience in integration engineering, including REST APIs, OpenAPI specifications, API gateways, and message-based or Change Data Capture (CDC) integration patterns.
Demonstrated experience working with legacy interfaces and integrating systems developed by other teams or vendors.
Ability to troubleshoot complex integration issues and support production application environments.

Responsibilities

Maintain privileged access to integration services and API gateways connecting the application portfolio.
Troubleshoot and resolve integration incidents, defects, and connectivity issues to ensure system reliability and continuity.
Maintain integration contracts, correlation identifiers, and acknowledgment mechanisms across connected systems.
Establish and maintain OpenAPI contracts at the platform gateway to standardize existing integrations.
Support the platform team's data feeds and integration requirements.
Work with legacy interfaces and existing application integrations to support modernization without disrupting ongoing operations.