Application Integration Engineer
McLean, VA
Experience: 0
Category: Information Technology
Contractor Work Model: Onsite
Brand: System One
Job ID: 379067
Date Posted: 08/25/2026
Shortcut: http://jobs.systemone.com/r5o7c6
Application Integration Engineer
Security Clearance: US Citizenship and the ability to obtain a public trust
Responsibilities
Responsibility 1: Implement application integration capabilities in support of a large-scale platform modernization program delivered through iterative agile execution.
Responsibility 2: Develop, configure, test, and support RESTful APIs, service integrations, messaging flows, data transformation logic, orchestration components, and interface services connecting legacy Java applications with cloud-native or microservices platforms.
Responsibility 3: Work under guidance to apply architecture patterns, API standards, security, and data integration approaches.
Responsibility 4: Select and implement integration patterns including synchronous APIs, asynchronous messaging, event-driven integration, batch processing, and workflow orchestration.
Responsibility 5: Design secure AWS access and connectivity with IAM, KMS, Secrets Manager, VPC, resource policies, and secure API exposure.
Responsibility 6: Establish operational visibility through CloudWatch metrics, logging, alarms, distributed tracing, and operational runbooks.
Responsibility 7: Support deployment and operations with strategies for deployment, rollback, incident response, capacity management, and cost considerations.
Responsibility 8: Implement secure integrations using OAuth2, OpenID Connect (OIDC), SAML, JWT, or similar standards.
Responsibility 9: support event-driven architectures, messaging systems, and asynchronous processing with SQS, SNS, EventBridge, Kafka, or similar.
Responsibility 10: Develop and support Oracle databases and SQL activities including query development, troubleshooting, and performance tuning.
Responsibility 11: Collaborate with cross-functional teams to clarify requirements, resolve dependencies, and support testing.
Responsibility 12: Document technical details, interface behavior, data mappings, API contracts, and operational procedures.
Responsibility 13: Troubleshoot defects, interoperability issues, data quality problems, API errors, authentication, database performance, cloud service issues, and deployment challenges.
Responsibility 14: Support CI/CD pipelines, automated testing, release planning, and operational transition activities.
Responsibility 15: Contribute to continuous improvement efforts to increase reliability, reduce manual effort, and improve platform maintainability.
Requirements
Requirement 1: Bachelor’s degree required.
Requirement 2: Minimum of five (5) to eight (8) years of professional experience in software engineering, application integration, API development, or related roles.
Requirement 3: Strong proficiency in Java, Spring Boot, RESTful APIs, microservices, and integration patterns, especially between Java applications and modern cloud-native platforms.
Requirement 4: Experience integrating Java and Python applications with APIs, messaging, data transformation, and orchestration.
Requirement 5: Experience with AWS services such as Lambda, ECS/EKS, SQS, SNS, EventBridge, API Gateway, DynamoDB, CloudWatch.
Requirement 6: Knowledge of implementing secure integrations with OAuth2, OIDC, SAML, JWT, or similar.
Requirement 7: Understanding of enterprise integration patterns, event-driven architecture, messaging systems, and asynchronous communication.
Requirement 8: Solid experience with relational databases like Oracle, including data modeling, query development, and performance tuning.
Requirement 9: Working knowledge of NoSQL databases such as DynamoDB, MongoDB, Cassandra.
Requirement 10: Ability to design domain models and implement domain-driven design principles.
Requirement 11: Experience with data integration involving mapping, transformation, validation, and migration.
Requirement 12: Familiarity with CI/CD, automated testing, Git version control, DevSecOps, and SDLC processes.
Requirement 13: Strong analytical and troubleshooting skills across applications, APIs, databases, cloud, and deployment environments.
Requirement 14: Excellent documentation skills including maintaining API details, data mappings, and operational notes.
Requirement 15: Ability to collaborate effectively in Agile teams with Solution Architects, developers, vendors, security, and business stakeholders.
Requirement 16: Self-motivated, adaptable, and capable of working in dynamic environments with minimal supervision.
Requirement 17: Experience provisioning AWS resources via infrastructure as code and deploying via automated pipelines.
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law
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