Senior Back End Java Engineer

Overview

Senior Back End Java Engineer — Cincinnati, OH

Type: Contract

Category: Development

Industry: Financial Services

Reference : JN -

Date Posted: 01/22/2026

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Onsite in Cincinnati, OH

Our client is a large United States financial institution headquartered in Cincinnati. It operates a significant branch and ATM network across several states and is ranked on the Fortune 500. The organization has grown through mergers and continues to invest in technology to serve retail and commercial customers.

Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.

Rate: $62.00 to $72.00/hr. w2

• Design and develop scalable and secure RESTful APIs used by iOS and Android applications.
• Build and maintain microservices in a cloud-native environment.
• Integrate backend services with mobile capabilities such as authentication, push notifications, and analytics pipelines.
• Conduct code reviews, debugging, monitoring, and performance tuning.
• Ensure reliability, scalability, and observability across backend services.
• Collaborate with mobile, web, Dev Ops, and product teams to deliver features.
• Maintain technical documentation and uphold engineering best practices.
• Participate in the full SDLC including requirements, design, development, testing, and production support.

• 5+ years of hands-on backend development using Java.
• Strong expertise in Spring Boot, RESTful API design, and microservices architecture.
• Experience with Apache Kafka for event-driven systems.
• Proficiency with AWS services such as Lambda, ECS or EKS, S3, API Gateway, and RDS or Dynamo
  
  DB.
• Experience with Kubernetes and containerized deployments.
• Familiarity with Terraform for infrastructure as code.
• Hands-on experience with CI/CD pipelines using Jenkins or similar tools.
• Experience using Dynatrace and/or Splunk for monitoring and logging.
• Understanding of backend support for mobile apps including authentication, performance, and scalability.
• Experience with RAG patterns, vector databases, or embeddings (preferred).
• Familiarity with model safety evaluations or responsible AI frameworks (preferred).
• Prior work building prototypes or proof-of-concept AI tools (preferred).
• Understanding of secure coding principles and adversarial AI risks (preferred).

• Bachelor’s degree in Computer Science or related field, or equivalent experience.
• AWS certification (preferred).

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position.

All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.

W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits…