Top Java Developer Jobs in NYC, NY

Develop, test, and roll out scalable Java-based features within a global team. Analyze existing implementations, collaborate with cross-functional teams, maintain documentation and runbooks, and apply TDD and cloud practices. Contribute to product roadmap, stakeholder communication, and sanctions screening-related functionality.

The Java Developer will propose solutions for client requirements, with 4+ years in Java, 2 years in Spring, and SQL knowledge.

The Core Java Developer will build applications in a Web Sphere environment, collaborate in Agile teams, and ensure high performance and security for applications.

The role involves developing core Java applications, using Spring frameworks, SQL for database management, and leveraging Hadoop technologies. Requires extensive experience in capital markets, multi-threading, and Unix commands.

Seeking a Java Engineer with TCP and multicast experience for data-centric projects, including data analytics and messaging.

Design, build, and maintain efficient, reusable Java backend systems; translate business requirements into applications; optimize performance and stability; review and test code for quality and security; identify and fix bottlenecks and bugs; maintain code quality and system responsiveness.

Lead the development of an AI-powered AML platform, guiding a team in best practices, architecture, and delivering high-quality software solutions using Java and React.

The Lead Java Developer will design, build, and operate large-scale trading platforms, focusing on low latency and cloud services. Responsibilities include development support, process automation, and team collaboration.

Develop, test, and deploy Java application components. Create JUnit tests and component documentation, prepare test environments, run component/assembly/system tests, troubleshoot and support applications, and collaborate with users to validate test results.

Build and enhance Citi's Integrated Digital Assets Platform backend. Collaborate on blockchain-based web applications, deliver functional scope, apply enterprise and web3 design patterns, maintain documentation, support solution engineering, and follow best practices for reliability, scalability, and performance in a distributed Agile team.

Lead a team building cloud-native, distributed microservices and full-stack systems to support credit line calculations for regulatory compliance. Collaborate with product managers, mentor engineers, experiment with emerging tech, and occasionally code and review code using Java, Python, container orchestration, Databricks, and AWS services.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

The Java Developer will enhance data utilization for a state-run project, aggregating and processing data, designing software, and collaborating with teams for testing and support.

Lead design and development of low-latency, high-performance Java microservices for electronic equities trading. Implement complex trading logic, optimize performance, conduct design reviews, partner with product and quant teams, improve testing and CI/CD pipelines, and maintain monitoring, reconciliation, and recovery capabilities while ensuring regulatory and operational risk controls.

Develop and maintain high-performance Java applications, work on web and mobile applications, and collaborate in Agile/Scrum teams.

Lead a team of developers to design, architect, and deliver scalable, secure microservices-based enterprise applications. Hands-on coding, code reviews, performance tuning, CI/CD, cloud deployments, stakeholder collaboration, and mentoring. Drive architecture, HLD/LLD, root-cause analysis, and timely delivery in Agile environments.

Design and optimize low-latency, high-throughput backend systems in payments processing using Java, while leading architectural changes and mentoring peers.

Develop and maintain full‑stack web and enterprise applications using Java and modern JavaScript stacks. Build REST/SOAP services, design data models, implement responsive UIs (AngularJS/React), work with relational and NoSQL databases, apply design patterns, perform testing and debugging, and support deployment on cloud and app servers.

Front-end focused Java Developer responsible for implementing UI mockups using HTML5, Angular, JavaScript and CSS, integrating with server APIs (JSON), debugging across browsers, and collaborating in Agile teams while communicating with clients.

Lead development and maintenance of an e-trading rates derivatives platform. Design architecture, implement business logic and services, own features from requirements through rollout, fix bugs, build QA automation and frameworks, partner with business leaders, and recommend tools and processes to optimize engineering delivery.

Contract Java developer to design and implement server-side J2EE applications using Spring, Web Services and related web technologies. Responsibilities include backend development, database design and tuning, messaging integration, deployment to web/app servers, and supporting cross-asset fixed income domain requirements.

Senior Java developer with strong core Java and web services experience. Requires at least 10 years of Java experience, architecture knowledge is a plus, and a minimum of 2 years in Capital Markets (recent experience preferred). Must have experience with onsite-offshore delivery models, strong written and verbal communication, and be willing to work on-site in New York City.

Senior Java/J2EE developer to design and build UI components that display real-time data from a database. Must use GWT and integrate with Oracle Integration Suite. 6+ month C2C contract based in NYC.

Develop and implement J2EE web applications using Java and Spring on WebSphere. Participate in full lifecycle: requirements, design, coding, testing, performance tuning, deployment, production support, and mentor junior developers.

Contract Java Developer (12-16 month contract) to develop and maintain applications using GWT, Java and J2EE. Must have GWT expertise; Spring, Hibernate and SQL are desirable. Located in New York; requires 5+ years of relevant experience.