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Freelance Java Backend Developer Jobs in Columbus, OH

Ampcus Inc

Java Backend Developer

Columbus, OH · On-site

$48.75 - $63.25/hr

We are seeking a skilled Java Backend Developer with strong expertise in Spring Framework to design, build, and maintain scalable backend systems. Responsibilities : • Develop and maintain backend ...

Sidram Technologies

Java Backend Developer

Columbus, OH · On-site

Java Backend Developer No sponsorship, local to Columbus, OH with 4 days' work in Easton office. Rate - $70 -80/hr on w2 Salary - $120,000/Yearly - $130,000/yearly + Benefits Must be in Columbus OH ...

Ampcus Inc

Java Backend Developer

Columbus, OH · On-site

$47.50 - $61.75/hr

This role blends hands-on software engineering with platform, infrastructure, and operational ownership. The engineer will support a modern AWS-based portal while also maintaining critical on-prem ...

SysMind Tech

Sr Java Developer - PA

Westerville, OH · On-site

$55.25 - $70.50/hr

... Strong backend experience to develop Data Layer using at least one of tperson frameworks like ... Can we use Freelancer? : No * Named Job Posting? (if Yes - needs to be approved by SCSC) : No

Hirekeyz Inc

Java AWS Lead

Columbus, OH · On-site

... back-end developer role Design and developer application using Core Java Design and developer ... application using J2EE. Experience in J2EE design patterns Create/consume Rest APIs & Microservices ...

InterSources Inc

Java Developer

Columbus, OH · On-site

$49.25 - $63.75/hr

They are seeking a Java Developer with a strong background in backend and frontend development, particularly in Java and React, to contribute to application development and operational stability.

Virtusa Corporation

Java Developer

Columbus, OH · On-site

$49.25 - $63.75/hr

Mandatory skills - Backend Java development with Spring boot, Microservices, Kafka work experience ... Should Be a Java Full Stack Developer. Bachelor's or Master's degree in Computer Science or related ...

Virtusa

Java Developer

Columbus, OH

$49.25 - $63.75/hr

Mandatory skills - Backend Java development with Spring boot, Microservices, Kafka work experience ... Should Be a Java Full Stack Developer. Bachelor's or Master's degree in Computer Science or related ...

Tech Tammina

Java Developer

Columbus, OH · On-site

$49.25 - $63.75/hr

Java Developer Location: Columbus OH Length: 6 Months + Mode of hire: Contract Interview Type ... Good mid-tier ability to make connections from front end to back end data sources and applications ...

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How much do freelance java backend developer jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for freelance java backend developer in Columbus, OH is $52.77, according to ZipRecruiter salary data. Most workers in this role earn between $46.92 and $60.82 per hour, depending on experience, location, and employer.

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Java Backend Developer

Ampcus Inc

Columbus, OH • On-site

$48.75 - $63.25/hr

Full-time

Re-posted 18 days ago

Job description

Job Summary:
Ampcus Inc. is a certified global provider of a broad range of Technology and Business consulting services. We are seeking a skilled Java Backend Developer with strong expertise in Spring Framework to design, build, and maintain scalable backend systems.
Responsibilities:
• Develop and maintain backend services using Java and Spring Boot.
• Design RESTful APIs and integrate with front-end applications and third-party services.
• Optimize application performance, scalability, and reliability.
• Collaborate with cross-functional teams (front-end, QA, DevOps) to deliver end-to-end solutions.
• Implement security and data protection best practices.
• Write unit and integration tests to ensure code quality.
• Participate in code reviews and contribute to continuous improvement.
• Troubleshoot, debug, and upgrade existing systems.
Qualifications:
Required:
• Strong proficiency in Java (Java 8)
• Hands-on experience with Spring Framework (Spring Boot, Spring MVC, Spring Data, Spring Security)
• Solid understanding of RESTful APIs and microservices architecture
• Experience with SQL/NoSQL databases (e.g., MySQL, PostgreSQL, MongoDB)
• Familiarity with version control systems (Git)
• Knowledge of CI/CD pipelines and cloud platforms (AWS, Azure, or GCP) is a plus
• Strong problem-solving skills and ability to work in an agile environment
Preferred:
• Experience with Docker/Kubernetes for containerization
• Familiarity with message brokers (Kafka, RabbitMQ)
• Exposure to test-driven development (TDD)
• Understanding of DevOps practices
Company:
Ampcus is a global business, technology consulting and an staff augmentation firm specializing in AI/ML,digital solutions, Cybersecurity & Risk management, Testing, Forensics & Fraud services and human capital management. Founded in 2004, the company is headquartered in Chantilly, USA, with a team of 1001-5000 employees. The company is currently Late Stage.
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About Ampcus

Sourced by ZipRecruiter

Ampcus Inc. is a ISO 20000, ISO 27000, ISO 9001, CMMI DEV/3 SM and CMMI SVC/3 SM certified global provider of a broad range of Technology and Business consulting services. From strategy to execution, our disciplined yet flexible approach starts and ends with our clients. By listening hard and working harder, client goals become our goals. Their success is our satisfaction. It’s why our clients sleep well at night. We believe that the success of an engagement is determined by strong project management, as well as clear communication and mutual commitment working collaboratively. Our methodology begins with listening to the customer about their needs, then working with their team to gain a clear understanding of the requirements, while providing knowledge transfer of best practices for the organization.

Industry

It services

Company size

1,001 - 5,000 Employees

Headquarters location

Chantilly, VA, US

Year founded

2004

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