Senior Java API Engineer (remote)

Job Title: Senior Java API Engineer
Location: Baltimore, MD, OFFSITE
Job Type: 6 months contract + extensions / contract to hire
Contractor Work Model: REMOTE
Time Zone: Ideally, 11am - 8pm EDT, however starting between 9am - 12pm EDT will also be considered

Job Overview
We are seeking a Senior Java API Engineer to support and enhance a REST-based API platform that powers native iOS and Android mobile applications. This role is ideal for engineers who thrive on building and supporting scalable, high-availability backend services using modern Java frameworks, including Micronaut, within a cloud-hosted Azure environment. The work involves solving complex backend challenges, supporting mobile-first architecture, and contributing to systems that demand strong reliability, security, and performance.

In this role, you will have meaningful ownership over critical backend services and the opportunity to influence API evolution, architecture decisions, and system improvements. Engineers are trusted to work independently, apply sound technical judgment, and deliver solutions that have visible, real-world impact for client-facing applications. This position plays a key role in ensuring stability, scalability, and continued growth of mobile application services within a fast-paced consulting environment.

Reports To
The Senior Java API Engineer will report to the Engineering Manager or Technical Lead


Responsibilities and Duties

• Maintain and enhance Java-based REST APIs that support native mobile applications across iOS and Android platforms.
• Develop new backend features and integrations while ensuring system reliability, scalability, and performance.
• Troubleshoot and resolve production issues across application, API, and infrastructure layers.
• Collaborate with mobile developers, QA engineers, project managers, and client stakeholders to deliver technical solutions aligned with business requirements.
• Participate in architecture and technical design discussions related to backend services and API development.
• Monitor application health, identify performance bottlenecks, and implement improvements to optimize system stability.
• Develop new backend features and integrations using Java and the Micronaut framework while ensuring system reliability, scalability, and performance.
• Collaborate with client engineering teams to support integrations involving Micronaut-based backend services and enterprise middleware platforms.
• Contribute to CI/CD processes, deployment activities, and operational best practices within an Azure-hosted environment.
• Participate in on-call support rotations and assist with incident response and root cause analysis as needed.
• Write clean, maintainable, and well-documented code following established engineering standards and best practices.
• Conduct code reviews and provide technical mentorship to other developers on the team.
• Collaborate with client engineering teams to support integrations involving custom middleware platforms and backend services.
• Stay informed on emerging backend engineering trends, security practices, and API development standards.

• Must be a U.S. citizen and currently based in the United States and authorized to work in the U.S. without sponsorship.
• Bachelor’s degree in computer science, Information Systems, Software Engineering, or a related technical field, or equivalent professional experience.
• 5+ years of professional software engineering experience with a focus on Java backend development.
• Experience developing and maintaining RESTful APIs in enterprise or production environments.
• Experience working with cloud-hosted applications, preferably within Microsoft Azure environments.
• Sound understanding of backend application architecture, API security, authentication, and integration patterns.
• Experience troubleshooting and supporting distributed applications in production environments.
• Familiarity with CI/CD pipelines, source control systems, and modern software delivery practices.
• Experience collaborating with cross-functional teams in Agile or iterative development environments.
• Experience working with the Micronaut framework or similar modern Java frameworks such as Spring Boot.
• Must be comfortable working in environments where the use of AI-assisted coding tools may be restricted due to client security or compliance requirements.
• Ability to communicate effectively with both technical and non-technical stakeholders.
• Ability to work independently while managing multiple priorities in a consulting or client-services environment.
• Experience supporting mobile application backend services is strongly preferred.
• Experience mentoring developers and participating in technical design discussions is preferred.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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