Top Java Developer Jobs in NYC, NY

Design, develop, test, deploy, and maintain scalable Java applications, services, and platforms supporting investment and business workflows. Build distributed systems, APIs, data platforms, and event-driven architectures; modernize existing technology; improve performance, reliability, and scalability; and contribute to architecture and technical strategy. Partner with users and engineering teams throughout the software development lifecycle to deliver production-quality solutions.

Lead development of scalable Java backend applications and high-availability cloud services. Design architectures, REST APIs, databases, caching systems, and distributed session infrastructure. Mentor engineers, drive technical initiatives, address performance and scalability challenges, and uphold quality and automation practices for endpoint management products.

Leads development of secure, scalable Java and cloud applications; designs, codes, tests, debugs, and reviews production software. Drives AI-assisted engineering practices, automation, monitoring, operational stability, secure SDLC adoption, and application resiliency. Evaluates vendor and internal architectural solutions while coaching teams on responsible AI use, secure coding, testing, and agile delivery.

Leads the design, development, testing, troubleshooting, and operational support of secure, scalable Java backend applications. Builds cloud-native microservices, resilient distributed systems, and RESTful solutions using SQL and NoSQL databases. Reviews code, resolves production issues, automates recurring remediation, supports continuous delivery, promotes modern engineering practices, and mentors teams across software engineering.

Develops secure, scalable Java software and microservices using Spring Boot, J2EE, REST, CQRS, Kafka, and Spark. Designs architectures, writes production code, troubleshoots systems, and maintains operational stability. Builds data and event contracts, integrates Oracle and Cassandra databases, and uses testing, observability, CI/CD, and automation tools. Applies AI-assisted development responsibly, validates generated outputs, analyzes data for system improvements, and contributes to secure agile engineering practices.

Develop secure, scalable software for JPMorganChase’s Wealth Management Account Opening platform. Responsibilities include designing, coding, testing, troubleshooting, and maintaining React and Java applications; integrating upstream and downstream systems; applying SDLC, agile, CI/CD, security, and resiliency practices; working with cloud platforms, Kubernetes, Kafka, and databases; analyzing data to resolve problems; and contributing to stable application delivery and inclusive team culture.

Lead development of full-stack cloud-native applications using Java, TypeScript, Spring Boot, Spring Cloud, and AWS. Responsibilities include designing microservices, APIs, agentic workflows, reactive systems, infrastructure as code, CI/CD, observability, databases, and performance testing. The role also leads responsible adoption of AI-assisted engineering tools, coaches teams on secure validation practices, and troubleshoots multi-agent environments.

Develop and support full-stack applications for prime brokerage and securities financing using Java, Scala, and Angular. Responsibilities include software design, development, testing, troubleshooting, production deployment, technical analysis, and system support. The role requires collaboration with global technology teams and trading and operations users, applying test-driven development and engineering best practices. Candidates will work with JVM technologies, databases, CI tools, Unix/Linux environments, and AI-assisted development tools in an agile environment.

Develop and support scalable full-stack cloud applications using Java, TypeScript, DB2, Snowflake, and AWS services. Translate stakeholder requirements into technical solutions, lead implementation initiatives, configure and deploy AWS infrastructure, and ensure testing, resiliency, and high availability. Collaborate independently with business users and Agile teams while using AI-assisted development tools to improve productivity and code quality.

Lead development of high-volume Java applications for financial margin calculation and risk management. Responsibilities include technical design, performance optimization, concurrent and distributed processing, batch and event-driven workflows, testing, production troubleshooting, resiliency improvements, code reviews, mentoring, and end-to-end delivery. The role partners with global technology, business, risk, and operations teams while ensuring security, regulatory, audit, and technology-control compliance.

Builds and enhances enterprise applications using Java and AWS. Responsibilities include gathering business requirements, independently driving implementation projects, deploying and configuring AWS infrastructure, testing applications, establishing resilient cloud setups, and using AI development tools. The role requires collaboration with users and strong analytical, problem-solving, communication, and technical skills.

Develops and owns scalable personalization software on GCP using Java and Python. Designs cloud-native, microservices, batch, real-time data processing, and distributed systems; writes code and tests, performs architecture and code reviews, supports application availability, and collaborates with product owners. Drives agile engineering practices, technical planning, continuous improvement, innovation, and mentorship across enterprise platforms.

Build and maintain scalable Java backend services and APIs for internal platforms. Integrate services with Salesforce and other systems, contribute to internal web applications, troubleshoot distributed systems, and ensure strong testing, observability, resilience, and CI/CD practices. Collaborate with product, technical program management, and business teams to deliver reliable tools supporting operations, marketing, support, risk, and data functions.

Architect, develop, and maintain highly concurrent, resilient, low-latency Java backend systems for Citi’s FX eCommerce trading platform. Partner with product and technology teams, define system enhancements, ensure architectural alignment, establish coding and testing standards, analyze complex technical problems, and support new product delivery. Advise and coach mid-level developers while managing risk, compliance, and project priorities.

Develop, test, troubleshoot, and maintain secure, stable, scalable software using Java, Spring Boot, REST APIs, microservices, and AWS. Collaborate within an agile team across the full SDLC, consider upstream and downstream system impacts, apply automation and AI-assisted development tools responsibly, analyze data to solve technical problems, and support application resiliency and security.

Develop and maintain high-impact trading applications for the Equity Finance Technology team using Core Java. Analyze complex business and system processes, ensure architectural alignment, establish coding and testing standards, and deliver solutions through agile practices. Collaborate with traders and global technology teams, perform QA and TDD/BDD, manage stakeholder expectations, assess risks, and mentor mid-level developers and analysts.

Develop and optimize high-performance, low-latency Java microservices for Citi’s electronic equities trading platform. Responsibilities include implementing trading logic, improving system performance and resiliency, leading technical design and code reviews, collaborating with quantitative and product teams, enhancing testing and deployment processes, and maintaining monitoring, reconciliation, and recovery solutions. The role requires expertise in JVM internals, concurrency, distributed systems, financial market protocols, and automated trading platforms.

Develop and operate low-latency Java connectivity platforms for equities electronic trading, including exchange and client connectivity, order management, algorithmic access, and direct market access. Optimize performance, concurrency, throughput, testing, monitoring, reconciliation, and application recovery. Partner with business, product, quantitative research, infrastructure, and support teams; resolve complex technology problems; manage projects; mentor junior engineers; and promote engineering best practices and production resilience.

Develop and lead backend Java development for a high-volume margin calculation platform supporting financial risk management. Responsibilities include technical design, performance optimization, concurrency, batch and event-driven processing, testing, production support, resiliency improvements, code review, mentoring, and cross-functional delivery. The role requires ownership of business-critical functionality while meeting security, regulatory, audit, and technology-control requirements.

Designs and delivers scalable Java and Python applications for mortgage trading, analytics, workflows, and reporting. Partners with business, risk, product, and technology teams to integrate platforms and develop products. Applies AI and GenAI to automate workflows and analysis, manages the software development lifecycle, supports production applications, resolves complex initiatives, and mentors junior team members.

Lead full‑stack development for hedge fund technology: gather requirements, design and implement Java/Python/React applications, support AWS/Terraform infrastructure and RDS databases, drive AI‑assisted engineering practices, mentor engineers, integrate third‑party vendor systems, and ensure secure, scalable, test‑driven delivery.

Develop and maintain secure, high-quality Core Java and Spring Boot software in large-scale environments. Design components, troubleshoot complex issues, implement automated unit, integration, and performance testing, and work with AWS infrastructure. Apply SDLC, Agile, CI/CD, resiliency, and security practices. Collaborate cross-functionally on Java support applications, cloud-native solutions, and potentially front-end technologies and analytics platforms.

Design, develop, debug, and operate Java applications, libraries, and distributed systems for capital markets technology. Responsibilities include writing efficient documented code, evolving messaging protocols, testing and benchmarking systems, conducting code reviews, troubleshooting performance issues, and collaborating through pairing and Agile development practices.

Develop scalable Java and Python applications for mortgage trading, quantitative analytics, workflows, and reporting. Integrate AI and generative AI capabilities, collaborate with business and technology teams, and oversee application development from analysis through production. Responsibilities include coding, testing, CI/CD, debugging, operational support, process improvement, and resolving complex technical initiatives. The role also advises stakeholders and coaches junior analysts while working with limited supervision.

Design, develop, test, deploy, and support scalable cloud-native applications using Java, Spring Boot, React, TypeScript, Node.js, PostgreSQL, microservices, and REST APIs. Build CI/CD pipelines, integrations, observability, and secure distributed systems while troubleshooting production issues and improving performance. Collaborate with Product, UX, QA, DevOps, Architecture, and clients throughout delivery.