Crystal Equation Corporation ยท 6 hours ago
Full Stack Engineer
Ridgefield Park, NJ
Contract
Onsite
Senior Level, Lead/Staff
$50/hr - $55/hr
9+ years expCrystal Equation Corporation is seeking a Full Stack Engineer who will primarily focus on Java-based Full-Stack application development while also supporting existing Android Mobile Applications. The ideal candidate will lead Java Full-Stack development and provide operational support for Android applications to ensure service continuity and operational stability.
Information TechnologyStaffing Agency
Hiring Manager
Justin Butler
Responsibilities
Lead and perform Java Full-Stack application development as the primary responsibility
Design, develop, and enhance backend services using Java, Spring / Spring Boot
Implement and maintain frontend components using HTML, CSS, JavaScript and modern frameworks
Support existing Java-based services and develop future enhancements based on business requirements
Provide operational support and maintenance for existing Android Mobile Applications
Understand Android application architecture and source code
Perform minor code changes, bug fixes, build, and deployment for Android applications
Support incident handling and troubleshooting related to Android mobile services
Provide application-level operational support for both Java and Android systems
Participate in incident response, root cause analysis, and corrective actions
Ensure system stability, service continuity, and reduced operational risk
Maintain technical documentation and support knowledge transfer
Collaborate with cross-functional teams to ensure smooth operations and enhancement delivery
Qualification
Required
Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience)
9+ years of professional experience in Java Full-Stack application development
Strong expertise in: Java, Spring / Spring Boot
Web technologies (HTML, CSS, JavaScript, React/Angular or equivalent)
RESTful API design and database integration
Experience in application operations, maintenance, and incident support
Ability to understand existing Android Mobile App source code
Experience or capability to: Modify existing Android code (Kotlin and/or Java)
Build and package Android applications
Perform deployment and operational support tasks
Junior-level Android skills are acceptable, as long as the candidate can independently support maintenance, build, and deployment
Preferred
Experience supporting enterprise-scale or production-critical systems
Familiarity with DevOps practices, CI/CD pipelines, and monitoring tools
Experience working in cloud or hybrid infrastructure environments
Background in both development-focused and operations-focused roles
Company
Crystal Equation Corporation
Crystal Equation Corporation is an information technology company providing staffing solutions.
201-500 employees
H1B Sponsorship
Crystal Equation Corporation has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (10)
2024 (7)
2023 (4)
2022 (4)
2021 (9)
2020 (9)
Funding
Current Stage
Growth StageRecent News
Business Standard India
2025-09-09
Trak.in - Indian Business of Tech, Mobile & Startups
2025-09-08
Company data provided by crunchbase