Top Senior Java Developer Jobs in NYC, NY

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.

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.

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.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Lead design, development, testing, deployment and support of cloud-native Java microservices and APIs. Build event-driven data pipelines using Kafka, work with AWS EKS/ECR/EC2/Beanstalk, implement CI/CD and containerization, collaborate in Agile teams, and drive technical alignment and innovation across IB Tech & CRM/Analytics.

Design, build, and maintain large-scale, cloud-native microservices and data pipelines for risk platforms. Write quality Java code, implement unit and automation tests, create CI/CD pipelines, perform refactoring, ensure availability, and collaborate across teams to improve scalability, reliability, and deployment automation.

Lead design and delivery of scalable, resilient distributed systems. Act as technical authority across teams, mentor engineers, drive architecture and CI/CD best practices, troubleshoot production issues, optimize performance, and enhance observability while writing production-grade Java.

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 the Java client library and high-performance C/C++ server applications. Implement message parsers and feed handlers, optimize for extreme throughput and low latency, build tools for petabyte-scale processing, collaborate on build/deploy/CI practices, monitor uptime, and support smooth feature rollouts.

Design, build, and maintain low-latency, high-availability Java backend services and REST APIs. Troubleshoot production issues, contribute to distributed microservice architectures, and participate in on-call rotations while working with Bots & Automation to build a bot runtime platform.

Design, develop, and maintain scalable Java/Micronaut enterprise frameworks and cloud-native microservices on Azure. Build and deploy services to AKS, create CI/CD pipelines with Azure DevOps, implement batch/asynchronous workflows, integrate messaging systems, optimize databases, and ensure security, observability, and resilience.

As a Senior Software Engineer, you will build cloud solutions, define migration strategies, mentor junior engineers, and ensure architectural integrity while collaborating with peers.

As a Senior Developer, you will modernize COBOL systems to Java, enhancing functionality and performance while collaborating with stakeholders and ensuring coding standards are met.

Designs, implements, and runs Java Spring Boot microservices and REST APIs; leads design, CI/CD, TDD, performance tuning, security, and cross-product collaboration. Coaches teams and owns product KPIs and production support.

The role involves developing and enhancing a margin calculation platform, resolving complex problems, and mentoring developers. Emphasis on collaboration and delivering robust software solutions within finance operations.

This role involves designing and implementing scalable Java applications for margin calculations in finance, leading problem resolution, and mentoring developers.

Design, build, and deliver scalable Java full-stack and microservices solutions for ETF platforms. Lead architecture, ensure security and quality (TDD/BDD), drive cloud-native modernization, support production stability, and apply DevOps, observability, and AI-assisted development to improve reliability and delivery.

Design, implement, test, and maintain scalable Java/J2EE microservices using Spring technologies. Collaborate with architects, follow SDLC, perform unit/system testing, troubleshoot distributed cloud applications, and work in Agile teams to meet enterprise performance and security standards.

Lead Software Engineer responsible for designing, developing, testing, and maintaining a distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements, implement cloud and big-data solutions (Spark/Hadoop), and ensure program standards and reliable delivery.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

Senior Java developer responsible for designing, implementing and testing Java/J2EE web applications. Work with Spring, Hibernate, JMS, web frameworks (Struts/JSF), frontend technologies (Angular, Bootstrap), relational databases (Oracle/SQL Server/MySQL), CI/build tools (Maven/Ant), testing tools, and application servers. Participate in Agile ceremonies, estimations, design sessions, and full SDLC activities.

Develop and maintain ATG/Java J2EE applications and web services. Implement front-end features (AngularJs, jQuery, HTML/CSS/JavaScript), use frameworks (Struts, Spring, Hibernate), work with WebLogic and Oracle (JDBC, PL/SQL), and collaborate across teams. Support microservices, RabbitMQ, AWS, and iOS/Swift components; participate in full SDLC activities.

Develop and maintain enterprise-class software for centralized management of hyper-converged data center products. Collaborate with architects, product management, QA and system test in Agile/Scrum, design integrations, implement REST APIs, troubleshoot complex technical issues, and ensure code quality and supportability.