API Integration Engineer

Koniag Services, Inc.; Washington (District of Columbia); Remote; USD 120,000 - 160,000; Full time

Benefits offered by this job

Health insurance

401(k) retirement plan

Paid time off

Job summary

Tuknik Government Services, LLC, a Koniag Government Services company, is seeking an API Integration Engineer with a Secret security clearance to support a U.S. Army program in the DC Metro area.

This is a contingent recruiting profile with the opening and staffing subject to final contract authorization. The role focuses on designing, building, securing, and monitoring interfaces between legacy systems and modern APIs, including REST, SOAP, data mappings, and security controls.

Qualifications

• Bachelor's degree in computer science, engineering, information systems, or related field.
• 5+ years designing and supporting enterprise integrations and APIs.
• Experience with REST, SOAP, JSON, XML, schemas, authentication, certificates, and monitoring.
• Experience integrating workflow platforms, relational databases, and external systems under change control.
• U.S. citizenship and active security clearance or eligibility at start of performance.

Responsibilities

• Inventory inbound/outbound interfaces, owners, schemas, endpoints, and monitoring needs.
• Develop interface decision matrices, ICDs, data mappings, and procedures.
• Design secure REST, SOAP, and event-based integrations using approved patterns.
• Create API facades/adapters preserving legacy contracts during transition.
• Support interfaces with PIEE, GEX, GFEBS, SAM.gov, FPDS, and Army services.
• Implement authentication, certificates, encryption, auditing, and error handling.
• Develop tests for contracts, schemas, transformations, and performance.
• Instrument interfaces with logs, health checks, and dashboards.
• Coordinate network/identity/DNS/certificates changes before cutover.
• Support migration, parallel operation, conformance, security, and retirement.

Skills

API integration engineering

Interface security

Schemas and data standards

Monitoring and recovery

Cutover coordination

Education

Bachelor's degree in CS/Engineering/IS

Experience may substitute for education

Tools

Appian Integration Objects

PIEE/GEX/SAM.gov/FPDS/VANTAGE integrations

Job description

Tuknik Government Services, LLC, a Koniag Government Services company, is seeking an API Integration Engineer with a Secret security clearance to support TGS in supporting our government customer in the DC Metro area. This position is for a Future New Business Opportunity.

Benefits include medical, dental, and vision insurance, 401(k) retirement plan, paid time off, paid parental leave, life and disability insurance, flexible spending accounts, commuter benefits and tuition reimbursement.

Tuknik Government Services, LLC, Koniag Government Services (KGS) is seeking qualified candidates for this role supporting our U.S. Army customer on a large-scale Army contracting systems modernization and automation program. Designs, builds, secures, tests, and monitors the interfaces connecting current and migrated capabilities with DLA PIEE modules and external Army and Federal systems. The engineer preserves existing data standards while decoupling legacy components through versioned APIs and adapters. This is a contingent recruiting profile; the opening, employing subsidiary, compensation, work location, and staffing remain subject to final contract authorization.

Essential Functions, Responsibilities & Duties may include, but are not limited to:

• Inventory inbound and outbound interfaces, owners, classifications, endpoints, authentication, schemas, dependencies, approval lead times, monitoring, and recovery requirements.
• Develop and maintain interface decision matrices, Interface Control Documents, data mappings, record layouts, and operational procedures.
• Design and implement secure REST, SOAP, message, file-transfer, and event-based integrations using approved Appian and conventional-code patterns.
• Create API facades and adapters that preserve legacy contracts while capabilities and schemas transition into a new solution.
• Support integrations involving GEX, GFEBS, FPDS/SAM, VANTAGE, EDA, Closeout, and other authorized PIEE or Army services.
• Implement approved authentication, authorization, certificates, secrets, encryption, validation, error handling, retry, idempotency, and audit logging.
• Develop automated contract, schema, transformation, negative-case, exception, performance, and recovery tests.
• Instrument interfaces with correlation identifiers, health checks, structured logs, alerts, and dashboards for rapid fault isolation.
• Coordinate network, identity, DNS, certificate, firewall, boundary, and partner-system changes before cutover.
• Support interface migration, parallel operation, conformance, security, regression, operational acceptance, rollback, and retirement.

Education and Experience Required:

• Bachelor's degree in computer science, engineering, information systems, or a related field; additional relevant experience may substitute for education.
• Five or more years designing and supporting enterprise integrations and APIs.
• Experience with REST, SOAP, JSON, XML, schemas, authentication, certificates, message/file transfer, API testing, and production monitoring.
• Experience integrating workflow platforms, relational databases, conventional applications, and external systems under controlled change processes.
• U.S. citizenship and the active security clearance or eligibility required for the assigned work by the start of performance, with ongoing eligibility thereafter.
• Ability to communicate clearly with Government, technical, and business stakeholders and to maintain accurate work records in approved systems.
• Ability to protect Controlled Unclassified Information and classified information, when assigned, and comply with required access, training, and handling procedures.

Education and Experience Desired:

• Experience with Appian Integration Objects, Connected Systems, web APIs, plug-ins, or integration SDKs.
• Experience with PIEE, GEX, GFEBS, SAM.gov, FPDS, VANTAGE, PDS/PRDS, or other acquisition interfaces.
• Experience supporting interfaces across IL-5 and IL-6 boundaries without assuming cross-domain data movement.

Required Skills and Competencies:

• API and enterprise integration engineering
• Interface security and identity
• Schemas, transformations, and data standards
• Monitoring, fault isolation, and recovery
• ICDs, partner coordination, and controlled cutover

Work Environment and Travel:

Work may occur remotely when authorized, at Government facilities, or in controlled office and data-center environments. Work involving classified information or SIPRNet will be performed at a Government-approved secure location using authorized systems. The role generally supports Government business hours, with occasional release, incident-response, maintenance-window, or approved travel requirements. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.

Our Equal Employment Opportunity Policy

The company is an equal opportunity employer. The company shall not discriminate against any employee or applicant because of race, color, religion, creed, ethnicity, sex, sexual orientation, gender or gender identity (except where gender is a bona fide occupational qualification), national origin or ancestry, age, disability, citizenship, military/veteran status, marital status, genetic information or any other characteristicprotected by applicable federal, state, or local law. We are committed to equal employment opportunity in all decisions related to employment, promotion, wages, benefits, and all other privileges, terms, and conditions of employment.

The company is dedicated to seeking all qualified applicants. If you require an accommodation to navigate or apply for a position on our website, please get in touch with Heaven Wood via e-mail at [e-mail] or by calling 703-488-9377 to request accommodations.

Koniag Government Services (KGS) is an Alaska Native Owned corporation supporting the values and traditions of our native communities through an agile employee and corporate culture that delivers Enterprise Solutions, Professional Services and Operational Management to Federal Government Agencies. As a wholly owned subsidiary of Koniag, we apply our proven commercial solutions to a deep knowledge of Defense and Civilian missions to provide forward leaning technical, professional, and operational solutions. KGS enables successful mission outcomes for our customers through solution-oriented business partnerships and a commitment to exceptional service delivery. We ensure long-term success with a continuous improvement approach while balancing the collective interests of our customers, employees, and native communities. For more information, please visit www.koniag-gs.com.

Equal Opportunity Employer/Veterans/Disabled.Shareholder Preference in accordance with Public Law 88-352