Top Java Developer Jobs in NYC, NY

As a Full Stack Java Developer, you will design and maintain scalable applications, develop RESTful APIs, enhance Java applications, and work on frontend components, while collaborating on system architecture and CI/CD processes.

Design and build high-performance Java/Spring Boot backend microservices and event-driven systems for global post-trade accounting. Integrate Snowflake and SQL Server, use Kafka for streaming, and Redis for low-latency caching. Participate in design, code reviews, testing, performance tuning, and cross-functional collaboration; occasionally support light UI updates and automation tasks. Focus on reliability, maintainability, and production readiness.

Lead design and delivery of high-throughput, fault-tolerant backend systems for Aladdin. Build microservices, streaming architectures, and distributed applications; collaborate with product and global teams; apply test-driven development, perform code reviews, and provide production support while mentoring engineers and driving technical roadmap.

Design, implement, and evolve scalable Java backend services powering Squarespace's Email product. Lead architecture and system design, build RESTful APIs, ensure reliability and observability, mentor engineers, troubleshoot production incidents, participate in on-call rotations, and collaborate cross-functionally to deliver customer-facing email capabilities.

Design, develop and deliver full stack applications using Java, AngularJS, and SQL, while collaborating in engineering pods through the software development lifecycle.

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

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.

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.

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.

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.

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.

Develop and maintain Java-based applications using SQL and Unix/Linux. Troubleshoot web components and networking, work with scheduling (Autosys) and monitoring tools (QTP), and apply domain knowledge in wealth management, banking, portfolio and trade processing. Collaborate on business systems architecture and infrastructure.

Develop and maintain Java-based applications in Unix/Linux environments; work with SQL databases, scheduling (Autosys) and monitoring/testing tools (QTP). Troubleshoot web/network components, apply scripting, and support business systems architecture related to wealth management, banking, portfolio and trade processing.

Develop and maintain Java middleware applications using Spring and Struts. Implement Spring Integration and RESTful services, build web UIs with JavaScript/jQuery/HTML/CSS, perform SQL work with MS SQL/Oracle, participate in design/architecture reviews, SDLC and project lifecycle activities, and work within financial services in a global delivery environment.

Design, develop, and test Java-based applications and web services using JPA/Hibernate, Spring/Struts, MQ, and REST/SOAP. Build database-backed solutions (MS SQL/Oracle), develop web UIs (JavaScript/jQuery/HTML/CSS), participate in SDLC, perform design and architecture reviews, and work in a financial services global delivery environment.

Design, develop, troubleshoot and implement enterprise integration solutions using Mule ESB and J2EE technologies across the full SDLC. Apply EAI/SOA best practices, build SOAP/REST services, use JMS, XSLT, CXF and Spring Framework, work in Agile teams, and support banking/financial services projects.

Develop and maintain Java-based systems using SQL on Unix/Linux. Troubleshoot web/network components, use scheduling tools (Autosys), familiarity with QTP, scripting, business systems architecture, and domain knowledge in wealth management, banking, portfolio and trade processing.

Design, develop, troubleshoot and implement enterprise integrations using Mule ESB and Java/J2EE technologies across the full SDLC. Apply EAI/SOA best practices, work in Agile teams, and deliver solutions in financial services environments.

Lead and develop enterprise Java applications in a WebSphere environment. Design and build REST/SOAP services, ensure thread-safe concurrency, tune high-volume systems, use J2EE/Spring frameworks and ORMs, work in Agile teams, write automated tests, integrate with MQ and databases, and mentor a small development team.

Develop and maintain high-end web applications using AngularJS, HTML5, CSS3 and Java. Work in an onsite-offshore delivery model, follow SDLC and Agile practices, liaise with senior client managers, and collaborate in a global delivery environment. Financial services experience is a plus.

Develop front-end features using HTML5, CSS, and object-oriented JavaScript. Build responsive user interfaces with frameworks (AngularJS, React, Ember.js), perform web performance tuning, and collaborate across teams. Requires ~4+ years IT experience and U.S. work authorization.

Design, develop, and support scalable, distributed market-risk engines and services in Java on Linux. Process large data volumes, work with DB2/RDBMS and XML/SOAP, write scripts for data analysis, and collaborate with global teams to deliver computationally intensive risk analytics.

Hiring 18 Java developers for three on-site locations (NY, Chicago, Dowingtown PA). Candidates must have 6-8 years Java experience, SCJP certification, and strong skills in Oracle, UML/design, Hibernate, Spring, Servlets, Struts, and front-end technologies (JavaScript/HTML/CSS/AJAX).

Lead full‑stack engineering teams to build cloud-based, microservices solutions for risk and compliance. Mentor developers, collaborate with product managers, and deliver scalable systems using React, Java, Python, cloud services, containerization, and databases to meet regulatory requirements.