Application Integration Engineer

Job Title: Application Integration Engineer 
Location: Remote
Type: Contract To Hire
Compensation: $130,000.00
Work Model: Remote
Hours: 40 hours a week 

Fed Gov end client requires W-2 only

Responsibilities
• Implement application integration capabilities in support of a large-scale platform modernization program delivered through iterative agile execution.
• 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.
• Work under guidance to apply architecture patterns, API standards, security, and data integration approaches.
• Select and implement integration patterns including synchronous APIs, asynchronous messaging, event-driven integration, batch processing, and workflow orchestration.
• Design secure AWS access and connectivity with IAM, KMS, Secrets Manager, VPC, resource policies, and secure API exposure.
• Establish operational visibility through CloudWatch metrics, logging, alarms, distributed tracing, and operational runbooks.
• Support deployment and operations with strategies for deployment, rollback, incident response, capacity management, and cost considerations.
• Implement secure integrations using OAuth2, OpenID Connect (OIDC), SAML, JWT, or similar standards.
• Support event-driven architectures, messaging systems, and asynchronous processing with SQS, SNS, EventBridge, Kafka, or similar.
• Develop and support Oracle databases and SQL activities including query development, troubleshooting, and performance tuning.
• Collaborate with cross-functional teams to clarify requirements, resolve dependencies, and support testing.
• Document technical details, interface behavior, data mappings, API contracts, and operational procedures.
• Troubleshoot defects, interoperability issues, data quality problems, API errors, authentication, database performance, cloud service issues, and deployment challenges.
• Support CI/CD pipelines, automated testing, release planning, and operational transition activities.
• Contribute to continuous improvement efforts to increase reliability, reduce manual effort, and improve platform maintainability.

Requirements
• Bachelor’s degree required.
• 5+ years of professional experience in software engineering, application integration, API development, or related roles.
• Strong proficiency in Java, Spring Boot, RESTful APIs, microservices, and integration patterns, especially between Java applications and modern cloud-native platforms.
• Experience integrating Java and Python applications with APIs, messaging, data transformation, and orchestration.
• Experience with AWS services such as Lambda, ECS/EKS, SQS, SNS, EventBridge, API Gateway, DynamoDB, CloudWatch.
• Knowledge of implementing secure integrations with OAuth2, OIDC, SAML, JWT, or similar.
• Understanding of enterprise integration patterns, event-driven architecture, messaging systems, and asynchronous communication.
• Solid experience with relational databases like Oracle, including data modeling, query development, and performance tuning.
• Working knowledge of NoSQL databases such as DynamoDB, MongoDB, Cassandra.
• Ability to design domain models and implement domain-driven design principles.
• Experience with data integration involving mapping, transformation, validation, and migration.
• Familiarity with CI/CD, automated testing, Git version control, DevSecOps, and SDLC processes.
• Strong analytical and troubleshooting skills across applications, APIs, databases, cloud, and deployment environments.
• Excellent documentation skills including maintaining API details, data mappings, and operational notes.
• Ability to collaborate effectively in Agile teams with Solution Architects, developers, vendors, security, and business stakeholders.
• Self-motivated, adaptable, and capable of working in dynamic environments with minimal supervision.
• 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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Ref: #851-Rockville-S1