Top Senior Java Developer Jobs in NYC, NY

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.

Develop and architect scalable Java software for NinjaOne’s endpoint management platform. The role involves building high-availability services, leading technical initiatives, making architectural decisions, improving quality practices, collaborating cross-functionally, mentoring engineers, and addressing scalability, performance, and technical debt challenges.

Develop and scale backend patch-management software using Java and Kotlin for millions of endpoints. Implement enterprise software, design scalable systems, build REST services, work with relational databases and caching systems, and uphold rigorous testing and quality standards. Collaborate with AI workflow, server, platform, design, and product teams. React or Angular experience may support occasional frontend work.

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.

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.

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.

Leads and mentors a distributed Agile software team while remaining hands-on in architecture, Java and Spring Boot development, Angular applications, REST APIs, AWS infrastructure, containerization, CI/CD, databases, observability, security, and production troubleshooting. Translates customer requirements into technical solutions, drives engineering best practices, supports capacity planning and performance feedback, and oversees scalable, resilient enterprise applications using AWS, Docker, Terraform/OpenTofu, and modern software development practices.

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.

Build and optimize latency-sensitive Java trading systems end-to-end: design algorithmic order types, tune JVM hot paths, maintain algo pipeline, integrate market-data and venue connectivity, partner with quant researchers, and migrate legacy Java services onto current LTS releases.

Build and maintain scalable full-stack applications using React and Java or Python. Develop microservices, optimize high-throughput systems, resolve architectural and performance issues, and deliver production-grade software in Agile environments. The role includes end-to-end implementation ownership, cloud development, AI-assisted engineering, and mentoring or leading developers.

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.

Leads full-stack development and modernization of cloud-based investment technology platforms. Designs APIs, user interfaces, AWS infrastructure, integrations, CI/CD pipelines, and production support processes. Oversees code reviews, testing, security, documentation, root-cause analysis, and operational improvements. Partners with investment, product, operations, vendors, and technology stakeholders to define requirements and deliver scalable solutions. Provides technical leadership, mentorship, governance, and delivery oversight across employees, contractors, and vendor teams.

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.

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.

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.

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.

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, containerized deployments, integrations, observability, and secure distributed systems. Troubleshoot production issues and improve performance, resilience, and maintainability while collaborating with product, UX, QA, DevOps, architecture, and engineering teams.

Build enterprise workforce management software for forecasting, staffing, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, PostgreSQL data models, integrations, and cloud-native deployments. Support CI/CD, production troubleshooting, performance optimization, architecture discussions, code reviews, and stakeholder collaboration across product, QA, DevOps, UX, and operations.

Develop and support scalable cloud-native applications using Java, Spring Boot, React, TypeScript, Node.js, PostgreSQL, and microservices. Responsibilities include building REST APIs, integrations, CI/CD pipelines, containerized deployments, observability, automated testing, and production support. The engineer will collaborate with product, UX, QA, DevOps, architecture, and clients while improving application performance, resilience, and maintainability. Workforce Management, Customer Experience, contact center, cloud, messaging, and secure API experience are advantageous.

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.

Senior Backend Engineer responsible for designing scalable Java Spring microservices, implementing features, resolving defects, and improving backend architecture. The role involves event-driven systems, relational and NoSQL databases, testing, code quality, mentoring engineers, technical leadership, and collaboration with product teams. Engineers will also validate AI-assisted code, promote AI development practices, and work with cloud-native tools across AWS, Docker, Kubernetes, and continuous delivery systems.

Design, build, and maintain scalable Java backend and microservices systems using Spring Boot. Develop and optimize Apache Spark data pipelines, databases, and secure REST APIs. Lead code reviews, enforce engineering standards, mentor developers, and collaborate with frontend, product, and DevOps teams. The role also involves performance optimization, cross-functional delivery, and ownership from concept through deployment.

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. The role involves performance optimization, concurrency, high-throughput architecture, automated testing, monitoring, reconciliation, application recovery, stakeholder collaboration, project execution, and mentoring junior engineers.