Senior Core Java Developer

Job-ID: 409709Sector: Technology and ITLocation: New York, NYContract: ContractPosted: 2026-09-01Deadline: 0001-01-01Our client, a leading organization in the financial services industry, is seeking a dedicated and experienced Senior Core Java Developer to join their dynamic team. As a Senior Core Java Developer, you will be an integral part of the software development department supporting critical backend systems. The ideal candidate will demonstrate strong problem-solving skills, adaptability, and a collaborative spirit, which will align successfully within the organization.Job Title: Senior Core Java DeveloperLocation: New York, NY / HybridWhat's the Job?Develop and maintain high-performance, real-time, low-latency multithreaded server-side applications using Core Java. Implement new features and optimize existing codebases leveraging Java 18+ features such as Executor framework and Generics. Design, develop, and query databases using SQL Server, Sybase, and Oracle to support application functionalities. Collaborate with cross-functional teams to ensure seamless integration of web services and web frameworks like Spring and J2EE. Participate in code reviews, testing, and documentation to uphold quality standards and best practices.What's Needed?Extensive experience in real-time, low-latency, multithreaded server-side application development. Proficiency in Core Java (preferably Java 18 and above), including features like Executor framework and Generics. Strong knowledge of collections, concurrency packages, HashMap, ArrayList, and sorting algorithms. Experience with database management systems such as SQL Server, Sybase, and Oracle, including designing and querying databases. Fair understanding of J2EE web frameworks like Spring and web services development.What's in it for me?Opportunity to work on cutting-edge technology projects in a collaborative environment. Engagement with a reputable organization committed to innovation and professional growth. Supportive team culture that values diversity, inclusion, and continuous learning. Potential for career advancement within a global organization. Competitive compensation aligned with your expertise and experience.If this is a role that interests you and you'd like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!About ManpowerGroup, Parent Company of: Manpower, Experis and Talent Solutions.Experis is a global leader in technology services and part of the ManpowerGroup (NYSE: MAN) family of brands. We connect skilled technology professionals with meaningful opportunities where they can grow their careers, expand their expertise and make a real impact. Guided by the belief that it takes Human Ingenuity to unlock the true potential of technology, Experis helps people gain experience with leading organizations, build sought-after skills and take the next step toward a brighter future. Backed by ManpowerGroup's 75+ years of workforce expertise and global reach across more than 70 countries and territories, Experis brings the scale, insight and opportunity to help people and businesses thrive. ManpowerGroup is consistently recognized for its commitment to inclusion, ethics and responsible business, including being named one of the World's Most Ethical Companies. Learn more at Experis.com.