Top Senior Java Developer Jobs in NYC, NY

Lead technical design and delivery of secure, scalable Java-based microservices on AWS. Guide and coach engineers, drive adoption of AI-assisted development practices, ensure code quality, and influence architecture and operational standards.

The Lead Software Engineer will lead technology projects, develop cloud-based solutions, and work with a team to create a messaging platform for Capital One Travel products.

Lead design and delivery of distributed, event-driven backend services using Java, Kafka, and AWS. Define architecture, ensure scalability/reliability/observability, own production operations, drive API/data modeling, implement CI/CD and testing, and mentor engineering teams.

Lead design, build, and operate scalable, resilient cloud-native Java microservices. Produce high-quality secure code, drive CI/CD and automation, manage Kubernetes deployments on AWS, champion AI-assisted engineering practices, evaluate vendors, and improve operational stability and team standards.

Lead an agile engineering team to design, build, and deliver secure, scalable backend systems. Provide technical guidance, develop and review production code, design low-latency Kafka data pipelines, architect microservices and APIs, provision AWS infrastructure using Terraform, and advocate firmwide engineering best practices.

Lead hands-on design, development, and support of real-time Fixed Income trading systems. Drive modernization, build trading tools, integrate messaging hubs, analyze legacy systems, deliver proofs-of-concept, define KPIs, and collaborate with trading, risk, and P&L stakeholders to ensure scalable, stable solutions.

Lead backend engineering for cloud-native, multi-cloud fintech products. Design scalable, reliable, and secure systems using domain modeling. Build testable, operable code, resolve production incidents, optimize performance and data access, and enable zero-downtime releases. Mentor teammates, drive technical direction, and continuously modernize technologies and patterns.

Lead and deliver secure, high-quality Java/Spring Boot solutions across the SDLC. Drive AI-assisted engineering adoption, improve automation and operational stability, evaluate vendor architectures, coach teams on secure/responsible AI use, and support cloud-native, observability, and event-driven designs within financial services.

Lead design and deliver production-grade trading systems using Python and Java, build AI-native platforms, champion AI-assisted engineering practices, partner with Credit Sales & Trading, support production stability, and drive adoption of secure, automated SDLC and cloud-native solutions.

Lead and contribute to design, develop, and maintain scalable Java/Spring Boot services on AWS. Drive adoption of enterprise-authorized AI-assisted engineering practices, ensure operational stability and monitoring (Prometheus/Grafana), troubleshoot complex issues, participate in architecture and code review, automate remediation, and mentor/lead software engineers.

Lead design, build, and maintain low-latency options algorithmic trading systems. Develop secure, high-quality production code, optimize performance, integrate market data and FIX protocols, apply AI-assisted engineering practices, mentor engineers, and collaborate with product to translate strategies into scalable algorithms while ensuring operational stability and observability.

Lead engineering of secure, scalable blockchain and cloud-native services. Design, develop, review, and troubleshoot production code; improve operational stability and automation; guide architecture evaluations and vendor integrations. Drive adoption and governance of AI-assisted engineering practices and coach teams on secure, compliant usage.

Lead Software Engineer responsible for designing, developing, and delivering secure, high-quality Java backend systems. Duties include coding, code review, test automation, ensuring operational stability for high-throughput low-latency applications, driving AI-assisted engineering practices, evaluating vendors, and using AWS and Terraform alongside messaging systems like Kafka.

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.

Lead and deliver secure, scalable backend services on an agile team: design and implement Java/Spring Boot REST APIs, build low-latency Kafka data pipelines, provision AWS infrastructure with Terraform, mentor engineers, and drive architecture and SDLC best practices.

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.

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.

Designs and delivers scalable Java and Python applications for mortgage technology, trading, analytics, workflows, and reporting. Partners with business, risk, product, and technology teams to integrate platforms and improve processes. Oversees development through testing, implementation, and operational support; applies AI and GenAI to automate workflows and analysis. Resolves complex technical initiatives, follows engineering and CI/CD standards, mentors junior staff, and serves as a subject matter expert.

Develop and maintain brokerage platform software across the full lifecycle, including design, coding, implementation, testing, documentation, deployment, debugging, and user requirements gathering. Work may involve Java Swing front-end trading platforms or Core Java back-end data and transport layers requiring multithreading and high throughput. Candidates should understand complex systems, propose solutions, and collaborate effectively with users and the development team.

Develop Java and J2EE business software applications, with a primary focus on designing and supporting SOAP and REST web services. The role requires more than six years of overall Java/J2EE experience, at least four years working with web services, and experience with Oracle SQL. This is a full-time position located in Long Island, New York.

Develop and maintain applications using Java and related technologies, while also working with Angular JS and Node JS frameworks.

The Core Java Developer will build applications in a Web Sphere environment, collaborate in Agile teams, and ensure high performance and security for applications.

Leads the entire application lifecycle, translating requirements into solutions, designing, developing, testing, and implementing technology solutions aimed at improving operations.

Design, develop, test, deploy, and maintain scalable Java enterprise applications, Spring Boot microservices, REST APIs, and distributed systems. Build Kafka-based event-driven solutions, secure APIs, integrate databases, create CI/CD pipelines, containerize and deploy applications with Docker and Kubernetes, and monitor production systems. Collaborate with architecture, DevOps, QA, product, and engineering teams while contributing to system design, performance optimization, and AI-enabled application initiatives.

Lead the development of an AI-powered AML platform, guiding a team in best practices, architecture, and delivering high-quality software solutions using Java and React.