Freelance Java Backend Developer Jobs in Cincinnati, OH

Hello,
We're seeking a skilled Backend Engineer with expertise in Java Spring Boot and .NET Full Stack Development to modernize legacy systems and build scalable backend solutions.
Job Title: Backend Modernization Engineer III
Location: Cincinnati, OH - Onsite
Payrate : $50/hr on W2.
TOP SKILLS:
Must Have:
Application Dev.
Java Spring Boot
.Net Full Stack Development
Nice To Have
Containerization (Docker, ECS, EKS, Kubenetes)
Jenkins
Terraform
What You'll Do
About This Role
We're seeking a versatile Backend Software Engineer who thrives at the intersection of technical excellence and collaborative innovation. This intermediate-level position is designed for a professional who brings both .NET and Java Spring Boot expertise while actively contributing to architectural decisions and driving solutions that make a real impact.
What You'll Do
Drive Technical Solutions Build robust, scalable backend systems using Java Spring Boot re-platforming systems that are currently .NET. Designing APIs and microservices that power critical business applications. You'll ensure high-quality code that meets our standards for performance, security, and maintainability.
Lead Through Collaboration Participate actively in agile ceremonies, contributing ideas that shape project direction and technical approach
Innovate and Optimize Develop applications in OpenShift with future potential for building cloud-native applications on AWS. Build containerized microservices, implement CI/CD pipelines, and create automated solutions that improve operational excellence. Stay ahead of technology trends and bring fresh perspectives to our development practices.
Ensure Excellence Write comprehensive unit tests, conduct thorough code reviews, and maintain security best practices. Collaborate with DevOps and operations teams to troubleshoot issues, optimize performance, and ensure our applications deliver exceptional user experiences while meeting compliance requirements.
What You'll Get
Competitive base salary
Medical, dental, and vision insurance coverage
Optional life and disability insurance provided
401(k) with a company match and optional profit sharing
Paid vacation time
Paid Bench time
Training allowance offering
You'll be eligible to earn referral bonuses!
What You Bring
Core Technical Skills
5-10 years professional software development experience with proven ability to deliver production-quality applications
Strong proficiency in Java Spring Boot (Java 17+) with deep understanding of Spring ecosystem (Security, Data, Cloud)
Solid experience with .NET Core/.NET 6+ and ASP.NET Core, including Web API development and Entity Framework
API Development expertise in designing and implementing RESTful services, including authentication, versioning, and documentation
Modern Development Practices
Cloud-native development experience with AWS services (EC2, RDS, S3, Lambda, ECS)
Containerization skills using Docker and orchestration with Kubernetes or ECS
Testing expertise with comprehensive unit testing (JUnit, NUnit/xUnit) and integration testing strategies
Version control mastery using Git with branching strategies and code review processes
Agile methodology experience with active participation in sprint planning, standups, and retrospectives
Professional Qualities
Problem-solving mindset with ability to analyze complex requirements and design elegant solutions
Communication skills that enable effective collaboration with technical and non-technical stakeholders
Learning agility with demonstrated ability to quickly adopt new technologies and frameworks
Quality focus with attention to code craftsmanship, documentation, and operational excellence
Bonus Points For
Advanced Technical Experience
Event-driven architecture using Apache Kafka, RabbitMQ, or AWS SNS/SQS
Advanced AWS services (API Gateway, CloudFormation, Systems Manager, Secrets Manager)
DevOps and Infrastructure
Infrastructure as Code with Terraform or AWS CDK
CI/CD pipeline design using Jenkins, GitHub Actions, or AWS CodePipeline
Security tooling including HashiCorp Vault, AWS IAM, and vulnerability scanning
Production troubleshooting and incident response experience