Senior Java Developer

We are looking for a Senior Java Developer for our client in

Mason, OH Job Title:

Senior Java Developer Job Location:

Mason, OH Job Type:

Contract Job Overview:

Pay Range:

$5 3hr - $58hr

Requirement/Must Have:

8+ years of experience in Java & Spring Boot Microservices / REST APIs . 6+ years of experience in AWS Core Services with Security Fundamentals . 6+ years of experience in AWS Glue & ELT / Data Ingestion Pipelines . 6+ years of experience in Apache Iceberg (Lakehouse Tables) . 6+ years of experience in Database Design & Optimization - Oracle and Aurora MySQL, plus working knowledge of MongoDB .

Responsibilities:

Lead the design and development of microservices and REST APIs using Java and Spring Boot. Define API contracts, implement business logic, validations, standardized error handling, and logging. Apply resiliency patterns (timeouts, retries, circuit breakers, idempotency) and drive performance improvements. Conduct code reviews, enforce engineering standards, and mentor team members. Build and operate services on AWS, following security and operational standards. Support CI/CD, release activities, and production troubleshooting. Design and optimize data access with Oracle, Aurora MySQL, and MongoDB. Support ELT pipelines using AWS Glue for ingestion, transformation, and standardization. Design and work with Apache Iceberg tables. Collaborate with data engineering and analytics teams. Integrate services with existing ML inference endpoints. Nice to

Have:

Athena optimization experience . Kafka/event streaming . Docker/Kubernetes (EKS) or ECS .

Observability tools:

CloudWatch, Splunk/ELK, PrometheGrafana, OpenTelemetry . Python for scripting/automation .

Security:

OAuth2/OIDC, JWT, OWASP . Infrastructure as

Code:

Terraform/CloudFormation .

Qualification and Education:

Strong experience in Java and Spring Boot building production APIs/microservices. Strong AWS experience including S3 and security fundamentals. Hands-on experience with AWS Glue and ELT/data ingestion patterns. Working knowledge of Apache Iceberg tables. Strong database experience with Oracle/Aurora MySQL, plus knowledge of MongoDB. Experience with CI/CD, Git, Maven/Gradle, and automated testing. Strong troubleshooting and communication skills.