Top Java Developer Jobs in NYC, NY

Leads the architecture, development, and delivery of a global equity derivatives pricing platform and RFQ workflow. Develops Java server and C# client features, designs REST-based solutions, maintains automated test suites, improves CI/CD pipelines, and supports deployment strategies. The role includes requirements refinement, architecture planning, proof-of-concepts, agile delivery, compliance, mentoring engineers, and collaboration with business and platform partners.

Develop and maintain scalable Java backend systems using Spring Boot and microservices architecture. Collaborate with customer teams, review specifications, write clean code, participate in code reviews, document solutions, and troubleshoot and optimize backend performance, reliability, and security. The role also contributes technical expertise to training next-generation AI systems, though prior AI experience is not required.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Hands-on senior engineer responsible for designing, building, and operating a multi-threaded, Linux-based, real-time Java platform for Equity Swaps. Drive architecture, mentor engineers, own core components (including cashflow calculator), operate and tune sharded MongoDB, improve CI/CD and test automation, lead L3 support, and use AI tooling to accelerate the SDLC.

Design, develop, test, deploy, and support scalable cloud-native applications using Java, Spring Boot, React, TypeScript, Node.js, PostgreSQL, and microservices. Build REST APIs, integrations, CI/CD pipelines, containerized deployments, and observable production systems. Collaborate with Product, UX, QA, DevOps, Architecture, and engineering teams while troubleshooting issues and improving application performance, resilience, and maintainability.

Design and build scalable media platform systems for uploading, processing, managing, and serving image, video, and audio assets. Own complex backend projects, develop reliable distributed systems and REST APIs, integrate cloud services and GenAI technologies, collaborate across engineering teams, mentor teammates, and participate in production on-call rotations.

Design, develop, test, document, and maintain high-performance Java trading and brokerage systems. Build backend services integrating REST, WebSockets, and FIX; troubleshoot complex issues; provide escalated support; collaborate across product and engineering teams; and deliver reliable, low-latency features within a mature codebase.

Develop and maintain scalable backend applications and services using Java and Spring Boot. Build and consume RESTful APIs, manage builds and dependencies with Maven, and use Git for source control. Troubleshoot, optimize, and support backend applications in a collaborative Agile development environment. The role requires U.S. citizenship and eligibility to pass an extensive background investigation and clearance process before project start.

Develop and maintain Java-based applications, integrations, workflows, and services supporting an Oracle Identity Manager IAM platform. Responsibilities include troubleshooting production issues, performing root cause analysis, developing SOAP and REST integrations, configuring connectors, supporting Oracle SOA workflows, assisting with upgrades and modernization, and maintaining security and change-management documentation. The role collaborates with government stakeholders and requires the ability to obtain an IT-II security clearance.

Build and maintain Java backend services, REST APIs, and full-stack web application features. Develop frontend functionality with modern JavaScript frameworks, use Python for supporting work, and leverage AI coding tools such as Claude Code. Write tests, debug issues, support deployment and maintenance, and collaborate on design decisions, code reviews, and application quality improvements.

Leads and mentors application engineers while designing Java and Spring Boot microservices. Oversees application modernization, VM-to-container migration, GCP and GKE deployments, Kubernetes troubleshooting, CI/CD, testing, database integration, observability, and distributed systems. Coordinates technical dependencies across a large application portfolio and collaborates with platform, DevOps, security, and architecture teams. Uses AI-assisted engineering tools to accelerate development, modernization, testing, documentation, and automation.

Build and operate cloud-native, AI-enabled applications for a financial services client. Develop React and TypeScript/JavaScript front ends with Java and Spring Boot microservices, deploy scalable AWS-based systems, integrate LLMs, RAG, MCP, and agent frameworks, maintain CI/CD pipelines, conduct automated and performance testing, and implement observability, security, and reliability practices. Collaborate with cross-functional stakeholders and troubleshoot production issues while working fully onsite.

Design, develop, test, deploy, and support scalable cloud-native workforce management and customer experience applications. Build Java and Spring Boot backend services, React and TypeScript interfaces, Node.js components, REST APIs, microservices, PostgreSQL data models, integrations, and CI/CD pipelines. Contribute to containerized cloud deployments, observability, security, performance optimization, production troubleshooting, and cross-functional technical collaboration.

Design, develop, deploy, and maintain secure, scalable Java and Spring Boot services for a multi-tenant ecommerce SaaS platform. Build REST APIs, optimize MySQL data access, operate AWS workloads, and support CI/CD, observability, testing, and production troubleshooting. Contribute to architecture and technical decisions, mentor engineers, use AI-assisted development tools responsibly, and help maintain PCI DSS compliance.

Design, develop, test, deploy, and support scalable cloud-native Workforce Management, Customer Experience, and operational applications. Build Java and Spring Boot backend services, React and TypeScript frontends, REST APIs, microservices, PostgreSQL data models, and system integrations. Contribute to containerization, Jenkins CI/CD, observability, security, production troubleshooting, performance improvements, and cross-functional engineering collaboration.

Leads full-stack engineering and AI modernization initiatives, designing scalable enterprise applications and architecture. Responsibilities include coding, testing, technical discovery, application modernization, security and privacy integration, engineering standards, mentoring, stakeholder consulting, and strategic technology leadership. The role requires collaboration across product, operations, data, and security teams while balancing innovation, platform stability, and delivery commitments.

Design, develop, deploy, and optimize high-volume Java backend applications for financial transactions and pricing. Build scalable microservices, transactional databases, APIs, messaging systems, and secure AWS deployment pipelines. Improve performance, reliability, and zero-downtime operations while supporting financial security standards. Collaborate across teams, lead code reviews, mentor engineers, and contribute to migrating monoliths to distributed architectures.

Leads and develops software engineering teams while remaining hands-on with Java and Spring Boot development. Responsibilities include setting architecture and technical roadmaps, delivering scalable enterprise applications, guiding Agile planning, improving CI/CD and DevOps practices, supporting production reliability, mentoring talent, and partnering with product and business stakeholders. The role manages hiring, performance, succession planning, and engineering excellence initiatives.

Designs, develops, and deploys enterprise applications using Java, Spring Boot, microservices, REST APIs, cloud services, databases, DevOps tools, and Angular or React. The role also involves AI exposure with Python, LangChain, and LangGraph, along with application security, monitoring, performance, deployment, and collaboration with project teams. The position is onsite in McLean, Virginia.

Lead development and delivery of pricing and yield-curve systems for fixed-income and repo products. Integrate live market and futures data, standardize curve risk buckets, implement consistent pricing via pricers and curve builders, roll out Fast Pricer APIs, and collaborate with traders, quants, and technology teams to ensure accurate risk and P&L in a real-time Java graph framework.

Lead development of high-performance financial trading applications and Order Management System features across Java backends and JavaScript frontends. Responsibilities include architecture, performance optimization, troubleshooting, code reviews, mentoring, technical planning, documentation, and collaboration with product managers and engineers. The role requires full-stack engineering experience, strong testing and problem-solving skills, and knowledge of the financial trading ecosystem.

Staff Java Software Engineer responsible for architecting, building, and operating scalable backend services, distributed systems, APIs, event-driven architectures, and third-party integrations. The role provides technical leadership, mentors engineers, establishes engineering standards, drives cross-functional delivery, manages production reliability, and partners with business and platform teams. Strong Java, architecture, integration, operational excellence, and communication skills are required; experience with Kafka, AWS, regulated systems, web UIs, AI platforms, and Salesforce is preferred.

Investigates customer escalations, performs root-cause analysis across complex Java codebases, and delivers production-ready fixes. Uses AI-assisted tools for log analysis, defect diagnosis, code remediation, test generation, and validation. Communicates issue status, documents resolutions, maintains knowledge content, supports teammates, and contributes to product enhancements. The role includes periodic after-hours and weekend pager coverage.

Develop and lead Java backend development for a high-volume margin calculation platform. Responsibilities include technical design, performance optimization, batch and event-driven processing, testing, production support, resiliency improvements, code reviews, mentoring, and stakeholder collaboration. The role translates complex financial requirements into secure, scalable solutions while supporting risk management and regulatory controls.

Develop and lead Java backend engineering for a high-volume margin calculation platform. Responsibilities include technical design, performance optimization, concurrent and distributed processing, batch and event-driven workflows, testing, production support, monitoring, resiliency, and root-cause analysis. The role translates complex financial requirements into reliable software, mentors engineers, establishes development standards, and partners with global technology, risk, operations, and business teams.