Principal Java Backend Software Engineer

Quantum Technologies LLC; Cincinnati (OH); On-site; USD 99,000 - 141,000; Full time

Job summary

Quantum Technologies. LLC is seeking a Principal Java Backend Software Engineer to design, build, and scale backend services in a fast-paced environment.

You will guide architecture decisions and lead agile squads while delivering high-quality code and robust APIs. The role requires expert Java and Spring experience, AWS proficiency, and a proven ability to mentor developers, implement secure coding practices, and collaborate across DevOps and product teams.

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, or related field.
• 12+ years of experience in backend software development.
• Strong expertise in Java and related technologies.
• Hands-on experience with Spring and Spring Boot frameworks.
• Experience building and consuming RESTful APIs.
• Proficiency with AWS cloud services.
• Experience with Git/GitHub and modern version control practices.
• Familiarity with DevOps tools such as Jenkins.
• Experience with Kafka or other messaging systems.
• Strong understanding of software design patterns (OOP and functional programming).
• Knowledge of secure coding practices and application security.
• Excellent problem-solving, communication, and collaboration skills.

Responsibilities

• Design, develop, and enhance backend features and applications with a focus on scalability, performance, and reliability.
• Define and drive the long-term technical vision and architecture across multiple services and systems.
• Act as a technical leader within agile squads, participating in all ceremonies from design to delivery.
• Develop high-quality, maintainable, and testable code following industry standards and metrics.
• Lead and mentor developers by conducting code reviews, defining standards, and sharing knowledge.
• Architect and integrate distributed systems, microservices, and RESTful APIs.
• Collaborate with DevOps and operations teams to improve system performance and reliability.
• Automate processes to achieve operational excellence.
• Stay updated with emerging technologies and industry trends.
• Troubleshoot and resolve complex technical issues for internal and external stakeholders.
• Maintain documentation, operational procedures, and ensure audit/compliance readiness.
• Identify, assess, and manage risks in alignment with organizational policies.

Skills

Java backend

Spring Framework

REST APIs

AWS

Git/GitHub

DevOps tooling

Kafka messaging

OO/FP design patterns

Secure coding

Communication

Problem solving

Education

Bachelor's degree in CS/IS or related

Tools

GitHub

Jenkins

AWS

Job description

Principal Java Backend Software Engineer

Location:

Duration:

6Months+ Extension

Domain Exposure:

Client:

To Be Discussed Later

Employment Type:

W-2, 1099, C2C

Work Authorization:

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Job Title:Principal Java Backend Software Engineer

Duration: 6 Months + Extension

Bill Rate: $87/hour (C2C)

Job Type: W-2, 1099, C2C

Client: To Be Discussed Later

Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description:

• Design, develop, and enhance backend features and applications with a focus on scalability, performance, and reliability
• Define and drive the long-term technical vision and architecture across multiple services and systems
• Act as a technical leader within agile squads, participating in all ceremonies from design to delivery
• Develop high-quality, maintainable, and testable code following industry standards and metrics
• Lead and mentor developers by conducting code reviews, defining standards, and sharing knowledge
• Architect and integrate distributed systems, microservices, and RESTful APIs
• Collaborate with DevOps and operations teams to improve system performance and reliability
• Automate processes to achieve operational excellence
• Stay updated with emerging technologies and industry trends
• Troubleshoot and resolve complex technical issues for internal and external stakeholders
• Maintain documentation, operational procedures, and ensure audit/compliance readiness
• Identify, assess, and manage risks in alignment with organizational policies

Required Skills & Qualifications

• Bachelor’s degree in Computer Science, Information Systems, or related field
• 12+ years of experience in backend software development
• Strong expertise in Java and related technologies
• Hands-on experience with Spring and Spring Boot frameworks
• Experience building and consuming RESTful APIs
• Proficiency with AWS cloud services
• Experience with Git/GitHub and modern version control practices
• Familiarity with DevOps tools such as Jenkins
• Experience with Kafka or other messaging systems
• Strong understanding of software design patterns (OOP and functional programming)
• Knowledge of secure coding practices and application security
• Excellent problem-solving, communication, and collaboration skills

Preferred Skills

• Experience with microservices architecture
• Exposure to GitHub Copilot or AI-assisted development tools
• Experience in financial services or fintech domain

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.