Sr Software Engineer - Java & APIs (Night Shift)

Job Title: Java Developer - Night Shift Location: Reston, VA Type: Contract to Hire Compensation: $79/HR Work Model: Hybrid – onsite and remote Overview Important Requirements (Please Read Before Applying) Night shift role (final schedule assigned after onboarding) Rotating weekend coverage required Onsite interview required 2 to 3 weeks onsite training required This is a hands on engineering plus production support role supporting high visibility, mission critical systems. About the Role We are looking for a Senior Software Engineer with strong Java, API, and production support experience to build, maintain, and support enterprise scale applications used by tens of thousands of users. This role is ideal for engineers who: Thrive in high impact, fast response environmentsEnjoy solving complex production issuesCan balance development plus operational supportAre comfortable working independently during overnight hoursWhat You Will Do Design, build, and enhance enterprise Java applications and APIsTroubleshoot and resolve critical production issues in real timeDevelop and execute unit tests and automated test casesSupport and improve system performance, reliability, and scalabilityWork across teams to deliver high availability systems at scaleContribute to architecture decisions and system designMaintain and improve CI CD pipelines, code quality, and deployment processesMentor junior engineers and contribute to team best practices What You Bring (Required) 5 or more years of software engineering experience Strong Java development experience (Java JEE, Spring ecosystem) Experience building and supporting REST APIs or web servicesProduction support experience (this is critical) Experience with: Spring Boot, MVC, Integration Hibernate or similar ORM frameworks SQL and database design CI CD tools (Jenkins, Maven, etc.) Front end basics: HTML, JavaScript, CSSStrong troubleshooting and problem solving skills Ability to work independently during overnight shiftsNice to Have API Management (APIM) experience Experience with Angular or ReactKnowledge of OAuth2, SSO, or security frameworksExperience with cloud platforms (AWS or Azure)Exposure to Big Data technologiesWhat Sets You Apart You write clean, efficient, production ready codeYou stay calm under pressure and can resolve critical issues quicklyYou are comfortable owning systems end to end You proactively identify improvements and drive them forward Reality of the Role (No Surprises) This is not a typical 9 to 5 development role. You will be: Working overnight shiftsSupporting live production systemsHandling high priority issues in real timeIn return, you will have: High ownership and visibility Opportunity to work on large scale, mission critical systemsA team that values strong, reliable engineers An opportunity to convert to a full-time employee of the client, based on eligibility and performance. 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. #M-1 #LI-AJ1 Ref: #851-Rockville-S1