Temporary Java Developer Startup Jobs in New Jersey

Date Posted: 08/26/2026
Hiring Organization: Rose International
Position Number: 506348
Industry: Financial Services
Job Title: Lead Java Developer
Job Location: Rutherford, NJ, USA, 07070
Work Model: Hybrid
Work Model Details: 3 days onsite and 2 days remote
Employment Type: Temp to Hire
FT/PT: Full-Time
Estimated Duration (In months): 7
Min Hourly Rate($): 100.00
Max Hourly Rate($): 110.00
Must Have Skills/Attributes: Agile, JMS, Oracle
Experience Desired: Experience in Java development (10 yrs); Understanding of Core Java, Java EE, Spring boot (10 yrs); Knowledge in Spring Microservices architecture and design patterns (10 yrs)
Required Minimum Education: Bachelor's Degree
Preferred Education: Master's Degree
**C2C is not available**
Job Description
Required Education:
Bachelor's degree in computer science
Preferred Education:
Master's degree preferred
Required Experience:
Minimum of 10 years of experience in Java development
Agile experience with application servers and web application servers
Full-stack developer with 8-10+ years of experience in designing and developing robust, scalable, and maintainable applications applying Object Oriented Design principles
Java Core with extensive hands-on experience with concurrent programming.
Hands-on experience in Web technologies (HTML, CSS), REST APIs, and Backend using Java/J2EE technologies.
Experience with Agile software development processes with a strong emphasis on test-driven development
Preferred Experience:
Experience with React JS
Experience in the financial or banking sector, automated testing experience
Experience with AI Dev tools such as Copilot
Required Technical Skills and Abilities:
Knowledge of Python, PySpark, and working in a Big Data environment is a plus
Knowledge of hardware and operating systems (Unix-based systems)
Knowledge of event-based architecture, JMS
Understanding of relational databases (Oracle)
Spring Framework including Core, Integration, Batch, JDBC, Hibernate.
Databases -RDBMS preferably Oracle, NoSQL preferably MongoDB.
Familiarity with Linux environment including scripting skills.
SDLC/Dev Ops - GitHub, CI/CD pipeline frameworks such as Jenkins, SonarQube, JIRA, any secure coding toolkits
In-depth knowledge in building enterprise web applications
In-depth knowledge and understanding of Core Java, Java EE, Spring Boot
Excellent knowledge of Spring Microservices architecture and design patterns
In-depth knowledge of Multithreading, Concurrency, JPA, Hibernate
Extensively used Eclipse or IntelliJ
Required Soft Skills:
Strong leadership skills, excellent communication, time management, planning, negotiation skills, and presentation skills are highly desirable.
Excellent analytical, problem-solving, and troubleshooting skills
Ability to work both independently and as part of a team
Ability to lead and coach a team of developers
Position Summary:
This is a Lead development position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to build robust, high-performance, large-scale applications.
We are seeking a candidate with strong knowledge of CI/CD pipelines and experience in tools such as JIRA, BlackDuck, SONAR, etc. The ideal candidate will have a demonstrated capacity to build sophisticated tooling for development and production team use.
The role requires an individual who is results-focused, proactive, highly collaborative, confident under pressure, and has demonstrated skills in both solution evangelism and expectation management. Someone who can operate with minimal level of direct supervision.
Responsibilities:
Agentic System Design: Lead the architectural design and implementation of multi-agent systems and autonomous AI solutions, ensuring scalability, robustness, and performance.
AI Agent Development: Develop, train, and fine-tune individual AI agents for tasks such as natural language understanding, decision-making, and task execution.
Orchestration & Integration: Design and implement frameworks for agent orchestration, communication, and collaboration within a larger ecosystem. Integrate agentic AI solutions with existing enterprise platforms and data sources.
Research & Innovation: Stay abreast of the latest advancements in agentic AI, multi-agent systems, and related fields. Conduct research and rapid prototyping of new AI technologies and methodologies.
Manage multiple teams of professionals to accomplish established goals and conduct personnel duties for the team (e.g. performance evaluations, hiring and disciplinary actions)
Provide strategic influence and exercise control over resources, budget management and planning while monitoring end results
Utilize in-depth knowledge of concepts and procedures within own area and basic knowledge of other areas to resolve issues
Ensure essential procedures are followed and contribute to defining standards
Integrate in-depth knowledge of applications development with overall technology function to achieve established goals
Provide evaluative judgement based on analysis of facts in complicated, unique, and dynamic situations, including drawing from internal and external sources
Influence and negotiate with senior leaders across functions, as well as communicate with external parties as necessary
Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Client, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency, as well as effectively supervise the activity of others and create accountability with those who fail to maintain these standards.
Collaborate with the business/Technical product owner & SMEs to perform detailed requirements analysis
Responsible for Components Design, Construction & Unit Testing of assigned components/modules
Perform technical review and resolve any technical challenges
Coordinate with customer stakeholders and bridge the offshore communication
Understanding of agile /waterfall development methodologies and test-driven development practices
Responsible for overall deliverables and highlight if any risks
#CT1

• **Only those lawfully authorized to work in the designated country associated with the position will be considered.**

• **Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client's business needs and requirements.**

Benefits:
For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.
California Pay Equity:
For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations' website here.
Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances.
If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department.
Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).