Full Stack Java Developer

Job Description:Apex Systems is a world class services business that incorporates industry insights and experience to deliver solutions that fulfill our clients digital visions.Apex has an opportunity for a Full Stack Java Developer to join our fast-paced financial services partner on an exciting initiative!Role: Full Stack Java DeveloperLocation: NYC, Hybrid onsiteTerm: 8+ Mo.Role Overview:Our client is seeking a Full Stack Java Developer to support and modernize a core Java platform that underpins frontoffice trading and capital markets functions. This role is part of a highly technical delivery team focused on uplisting, remediation, and modernization of a mature Java environment within a regulated, highavailability financial services context.This is a handson engineering role for someone who enjoys working close to the code, understands production systems, and is comfortable navigating the controls, governance, and rigor that come with investment banking technology.Key Responsibilities * Design, develop, and enhance Javabased applications supporting frontoffice trading and capital markets workflows * Contribute to application modernization and uplift initiatives, including refactoring legacy components and improving performance, stability, and scalability * Collaborate with other engineers, QA, and stakeholders to deliver highquality solutions in a teambased Agile environment * Support productionoriented development, including troubleshooting, defect resolution, and remediation work * Ensure solutions align with security, compliance, and regulatory standards common to global financial institutions * Document technical designs and actively participate in code reviews and knowledge sharingRequired Qualifications * Strong handson Java development experience (backendleaning full stack) * Proven ability to work independently while collaborating effectively within a team * Experience developing in enterprise or regulated environments (financial services strongly preferred) * Comfortable working on complex, existing codebases rather than greenfield only * Strong verbal and written communication skills; fluent English requiredPreferred / NicetoHave Experience * Exposure to Fixed Income or Capital Markets technology (trading, risk, market data, posttrade, etc.) * Experience with common Santanderadjacent stacks such as: * Spring / Spring Boot * RESTful services and APIbased architectures * SQL and relational databases * Frontend exposure (e.g., Angular, React, or similar) * CI/CD tools (e.g., Jenkins, Gitbased workflows) * Cloud exposure (AWS or similar environments) * Familiarity or curiosity around AIassisted development, automation, or analytics * Spanish language skills (nice to have, not required)Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free co